reactos/base/applications/rapps/appview.cpp

/*
 * PROJECT:     ReactOS Applications Manager
 * LICENSE:     GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
 * PURPOSE:     Application view class and other classes used by it
 * COPYRIGHT:   Copyright 2020 He Yang (1160386205@qq.com)
 *              Copyright 2022,2023 Mark Jansen <mark.jansen@reactos.org>
 */

#include "rapps.h"
#include "appview.h"
#include "gui.h"
#include <windowsx.h>

using namespace Gdiplus;

// **** CMainToolbar ****

VOID
CMainToolbar::AddImageToImageList(HIMAGELIST hImageList, UINT ImageIndex)
{
    HICON hImage;

    if (!(hImage =
              (HICON)LoadImageW(hInst, MAKEINTRESOURCE(ImageIndex), IMAGE_ICON, m_iToolbarHeight, m_iToolbarHeight, 0)))
    {
        return;
    }

    ImageList_AddIcon(hImageList, hImage);
    DeleteObject(hImage);
}

HIMAGELIST
CMainToolbar::InitImageList()
{
    HIMAGELIST hImageList;

    /* Create the toolbar icon image list */
    hImageList = ImageList_Create(m_iToolbarHeight, m_iToolbarHeight, ILC_MASK | GetSystemColorDepth(), 1, 1);
    if (!hImageList)
    {
        return NULL;
    }

    AddImageToImageList(hImageList, IDI_INSTALL);
    AddImageToImageList(hImageList, IDI_UNINSTALL);
    AddImageToImageList(hImageList, IDI_MODIFY);
    AddImageToImageList(hImageList, IDI_CHECK_ALL);
    AddImageToImageList(hImageList, IDI_REFRESH);
    AddImageToImageList(hImageList, IDI_UPDATE_DB);
    AddImageToImageList(hImageList, IDI_SETTINGS);
    AddImageToImageList(hImageList, IDI_EXIT);

    return hImageList;
}

CMainToolbar::CMainToolbar() : m_iToolbarHeight(24), m_dButtonsWidthMax(0)
{
}

VOID
CMainToolbar::OnGetDispInfo(LPTOOLTIPTEXT lpttt)
{
    UINT idButton = (UINT)lpttt->hdr.idFrom;

    switch (idButton)
    {
        case ID_EXIT:
            lpttt->lpszText = MAKEINTRESOURCEW(IDS_TOOLTIP_EXIT);
            break;

        case ID_INSTALL:
            lpttt->lpszText = MAKEINTRESOURCEW(IDS_TOOLTIP_INSTALL);
            break;

        case ID_UNINSTALL:
            lpttt->lpszText = MAKEINTRESOURCEW(IDS_TOOLTIP_UNINSTALL);
            break;

        case ID_MODIFY:
            lpttt->lpszText = MAKEINTRESOURCEW(IDS_TOOLTIP_MODIFY);
            break;

        case ID_SETTINGS:
            lpttt->lpszText = MAKEINTRESOURCEW(IDS_TOOLTIP_SETTINGS);
            break;

        case ID_REFRESH:
            lpttt->lpszText = MAKEINTRESOURCEW(IDS_TOOLTIP_REFRESH);
            break;

        case ID_RESETDB:
            lpttt->lpszText = MAKEINTRESOURCEW(IDS_TOOLTIP_UPDATE_DB);
            break;
    }
}

HWND
CMainToolbar::Create(HWND hwndParent)
{
    CStringW szInstallBtn;
    CStringW szUninstallBtn;
    CStringW szModifyBtn;
    CStringW szSelectAllBtn;
    CStringW szRefreshBtn;
    CStringW szUpdateDbBtn;

    /* Load tooltip strings */
    szInstallBtn.LoadStringW(IDS_TOOLTIP_INSTALL);
    szUninstallBtn.LoadStringW(IDS_TOOLTIP_UNINSTALL);
    szModifyBtn.LoadStringW(IDS_TOOLTIP_MODIFY);
    szSelectAllBtn.LoadStringW(IDS_TOOLTIP_SELECT_ALL);
    szRefreshBtn.LoadStringW(IDS_TOOLTIP_REFRESH);
    szUpdateDbBtn.LoadStringW(IDS_TOOLTIP_UPDATE_DB);

    /* Create buttons */
    TBBUTTON Buttons[] = {
        /* iBitmap, idCommand, fsState, fsStyle, bReserved[2], dwData, iString */
        {0, ID_INSTALL, TBSTATE_ENABLED, BTNS_BUTTON | BTNS_AUTOSIZE, {0}, 0, (INT_PTR)szInstallBtn.GetString()},
        {1, ID_UNINSTALL, TBSTATE_ENABLED, BTNS_BUTTON | BTNS_AUTOSIZE, {0}, 0, (INT_PTR)szUninstallBtn.GetString()},
        {2, ID_MODIFY, TBSTATE_ENABLED, BTNS_BUTTON | BTNS_AUTOSIZE, {0}, 0, (INT_PTR)szModifyBtn.GetString()},
        {3, ID_CHECK_ALL, TBSTATE_ENABLED, BTNS_BUTTON | BTNS_AUTOSIZE, {0}, 0, (INT_PTR)szSelectAllBtn.GetString()},
        {-1, 0, TBSTATE_ENABLED, BTNS_SEP, {0}, 0, 0},
        {4, ID_REFRESH, TBSTATE_ENABLED, BTNS_BUTTON | BTNS_AUTOSIZE, {0}, 0, (INT_PTR)szRefreshBtn.GetString()},
        {5, ID_RESETDB, TBSTATE_ENABLED, BTNS_BUTTON | BTNS_AUTOSIZE, {0}, 0, (INT_PTR)szUpdateDbBtn.GetString()}};

    m_hWnd = CreateWindowExW(
        0, TOOLBARCLASSNAMEW, NULL, WS_CHILD | WS_VISIBLE | TBSTYLE_FLAT | TBSTYLE_TOOLTIPS | TBSTYLE_LIST, 0, 0, 0, 0,
        hwndParent, 0, hInst, NULL);

    if (!m_hWnd)
    {
        return FALSE;
    }

    SendMessageW(TB_SETEXTENDEDSTYLE, 0, TBSTYLE_EX_HIDECLIPPEDBUTTONS);
    SetButtonStructSize();

    /* Set image list */
    HIMAGELIST hImageList = InitImageList();

    if (hImageList)
    {
        ImageList_Destroy(SetImageList(hImageList));
    }

    AddButtons(_countof(Buttons), Buttons);

    /* Remember ideal width to use as a max width of buttons */
    SIZE size;
    GetIdealSize(FALSE, &size);
    m_dButtonsWidthMax = size.cx;

    return m_hWnd;
}

VOID
CMainToolbar::HideButtonCaption()
{
    DWORD dCurrentExStyle = (DWORD)SendMessageW(TB_GETEXTENDEDSTYLE, 0, 0);
    SendMessageW(TB_SETEXTENDEDSTYLE, 0, dCurrentExStyle | TBSTYLE_EX_MIXEDBUTTONS);
}

VOID
CMainToolbar::ShowButtonCaption()
{
    DWORD dCurrentExStyle = (DWORD)SendMessageW(TB_GETEXTENDEDSTYLE, 0, 0);
    SendMessageW(TB_SETEXTENDEDSTYLE, 0, dCurrentExStyle & ~TBSTYLE_EX_MIXEDBUTTONS);
}

DWORD
CMainToolbar::GetMaxButtonsWidth() const
{
    return m_dButtonsWidthMax;
}
// **** CMainToolbar ****

// **** CSearchBar ****

CSearchBar::CSearchBar() : m_Width(180), m_Height(22)
{
}

VOID
CSearchBar::SetText(LPCWSTR lpszText)
{
    SendMessageW(SB_SETTEXT, SBT_NOBORDERS, (LPARAM)lpszText);
}

HWND
CSearchBar::Create(HWND hwndParent)
{
    CStringW szBuf;
    m_hWnd = CreateWindowExW(
        WS_EX_CLIENTEDGE, L"Edit", NULL, WS_CHILD | WS_VISIBLE | ES_LEFT | ES_AUTOHSCROLL, 0, 0, m_Width, m_Height,
        hwndParent, (HMENU)NULL, hInst, 0);

    SendMessageW(WM_SETFONT, (WPARAM)GetStockObject(DEFAULT_GUI_FONT), 0);
    szBuf.LoadStringW(IDS_SEARCH_TEXT);
    SetWindowTextW(szBuf);
    return m_hWnd;
}
// **** CSearchBar ****

// **** CComboBox ****

CComboBox::CComboBox() : m_Width(80), m_Height(22)
{
}

HWND
CComboBox::Create(HWND hwndParent)
{
    m_hWnd = CreateWindowW(
        WC_COMBOBOX, L"", CBS_DROPDOWNLIST | CBS_HASSTRINGS | WS_CHILD | WS_OVERLAPPED | WS_VISIBLE, 0, 0, m_Width,
        m_Height, hwndParent, NULL, 0, NULL);

    SendMessageW(WM_SETFONT, (WPARAM)GetStockObject(DEFAULT_GUI_FONT), 0);

    for (int i = 0; i < (int)_countof(m_TypeStringID); i++)
    {
        CStringW szBuf;
        szBuf.LoadStringW(m_TypeStringID[i]);
        SendMessageW(CB_ADDSTRING, 0, (LPARAM)(LPCWSTR)szBuf);
    }

    SendMessageW(CB_SETCURSEL, m_DefaultSelectType, 0); // select the first item

    return m_hWnd;
}
// **** CComboBox ****

// **** CAppRichEdit ****

VOID
CAppRichEdit::LoadAndInsertText(UINT uStringID, const CStringW &szText, DWORD TextFlags)
{
    CStringW szLoadedText;
    if (!szText.IsEmpty() && szLoadedText.LoadStringW(uStringID))
    {
        const DWORD StringFlags = CFE_BOLD;
        InsertText(szLoadedText, StringFlags);
        InsertText(szText, TextFlags);
    }
}

VOID
CAppRichEdit::LoadAndInsertText(UINT uStringID, DWORD StringFlags)
{
    CStringW szLoadedText;
    if (szLoadedText.LoadStringW(uStringID))
    {
        InsertText(L"\n", 0);
        InsertText(szLoadedText, StringFlags);
        InsertText(L"\n", 0);
    }
}

VOID
CAppRichEdit::InsertTextWithString(UINT StringID, const CStringW &Text, DWORD TextFlags)
{
    if (!Text.IsEmpty())
    {
        LoadAndInsertText(StringID, Text, TextFlags);
    }
}

VOID
CAppRichEdit::SetWelcomeText()
{
    CStringW szText;

    szText.LoadStringW(IDS_WELCOME_TITLE);
    SetText(szText, CFE_BOLD);

    szText.LoadStringW(IDS_WELCOME_TEXT);
    InsertText(szText, 0);

    szText.LoadStringW(IDS_WELCOME_URL);
    InsertText(szText, CFM_LINK);
}
// **** CAppRichEdit ****

int
ScrnshotDownloadCallback(pASYNCINET AsyncInet, ASYNC_EVENT Event, WPARAM wParam, LPARAM lParam, VOID *Extension)
{
    ScrnshotDownloadParam *DownloadParam = (ScrnshotDownloadParam *)Extension;
    switch (Event)
    {
        case ASYNCINET_DATA:
            DWORD BytesWritten;
            WriteFile(DownloadParam->hFile, (LPCVOID)wParam, (DWORD)lParam, &BytesWritten, NULL);
            break;
        case ASYNCINET_COMPLETE:
            CloseHandle(DownloadParam->hFile);
            SendMessage(
                DownloadParam->hwndNotify, WM_RAPPS_DOWNLOAD_COMPLETE, (WPARAM)ERROR_SUCCESS, (LPARAM)DownloadParam);
            break;
        case ASYNCINET_CANCELLED:
            CloseHandle(DownloadParam->hFile);
            SendMessage(
                DownloadParam->hwndNotify, WM_RAPPS_DOWNLOAD_COMPLETE, (WPARAM)ERROR_CANCELLED, (LPARAM)DownloadParam);
            break;
        case ASYNCINET_ERROR:
            CloseHandle(DownloadParam->hFile);
            SendMessage(DownloadParam->hwndNotify, WM_RAPPS_DOWNLOAD_COMPLETE, wParam, (LPARAM)DownloadParam);
            break;
        default:
            ATLASSERT(FALSE);
            break;
    }
    return 0;
}

// **** CAppScrnshotPreview ****

CAppScrnshotPreview::CAppScrnshotPreview(const CStringW &BasePath) : m_BasePath(BasePath)
{
}

BOOL
CAppScrnshotPreview::ProcessWindowMessage(
    HWND hwnd,
    UINT Msg,
    WPARAM wParam,
    LPARAM lParam,
    LRESULT &theResult,
    DWORD dwMapId)
{
    theResult = 0;
    switch (Msg)
    {
        case WM_CREATE:
            hBrokenImgIcon =
                (HICON)LoadImage(hInst, MAKEINTRESOURCE(IDI_BROKEN_IMAGE), IMAGE_ICON, BrokenImgSize, BrokenImgSize, 0);
            break;
        case WM_SIZE:
        {
            if (BrokenImgSize != min(min(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)), BROKENIMG_ICON_SIZE))
            {
                BrokenImgSize = min(min(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)), BROKENIMG_ICON_SIZE);

                if (hBrokenImgIcon)
                {
                    DeleteObject(hBrokenImgIcon);
                    hBrokenImgIcon = (HICON)LoadImage(
                        hInst, MAKEINTRESOURCE(IDI_BROKEN_IMAGE), IMAGE_ICON, BrokenImgSize, BrokenImgSize, 0);
                }
            }
            break;
        }
        case WM_RAPPS_DOWNLOAD_COMPLETE:
        {
            ScrnshotDownloadParam *DownloadParam = (ScrnshotDownloadParam *)lParam;
            AsyncInetRelease(AsyncInet);
            AsyncInet = NULL;
            switch (wParam)
            {
                case ERROR_SUCCESS:
                    if (ContentID == DownloadParam->ID)
                    {
                        DisplayFile(DownloadParam->DownloadFileName);
                        // send a message to trigger resizing
                        ::SendMessageW(::GetParent(m_hWnd), WM_RAPPS_RESIZE_CHILDREN, 0, 0);
                        InvalidateRect(0, 0);
                        TempImagePath =
                            DownloadParam->DownloadFileName; // record tmp file path in order to delete it when cleanup
                    }
                    else
                    {
                        // the picture downloaded is already outdated. delete it.
                        DeleteFileW(DownloadParam->DownloadFileName);
                    }
                    break;
                case ERROR_CANCELLED:
                    DeleteFileW(DownloadParam->DownloadFileName);
                    break;
                default:
                    DisplayFailed();
                    // send a message to trigger resizing
                    ::SendMessageW(::GetParent(m_hWnd), WM_RAPPS_RESIZE_CHILDREN, 0, 0);
                    InvalidateRect(0, 0);
                    DeleteFileW(DownloadParam->DownloadFileName);
                    break;
            }
            delete DownloadParam;
            break;
        }
        case WM_PAINT:
        {
            PAINTSTRUCT ps;
            HDC hdc = BeginPaint(&ps);
            CRect rect;
            GetClientRect(&rect);

            PaintOnDC(hdc, rect.Width(), rect.Height(), ps.fErase);

            EndPaint(&ps);
            break;
        }
        case WM_PRINTCLIENT:
        {
            if (lParam & PRF_CHECKVISIBLE)
            {
                if (!IsWindowVisible())
                    break;
            }
            CRect rect;
            GetClientRect(&rect);

            PaintOnDC((HDC)wParam, rect.Width(), rect.Height(), lParam & PRF_ERASEBKGND);
            break;
        }
        case WM_ERASEBKGND:
        {
            return TRUE; // do not erase to avoid blinking
        }
        case WM_TIMER:
        {
            switch (wParam)
            {
                case TIMER_LOADING_ANIMATION:
                    LoadingAnimationFrame++;
                    LoadingAnimationFrame %= (LOADING_ANIMATION_PERIOD * LOADING_ANIMATION_FPS);
                    HDC hdc = GetDC();
                    CRect rect;
                    GetClientRect(&rect);

                    PaintOnDC(hdc, rect.Width(), rect.Height(), TRUE);
                    ReleaseDC(hdc);
            }
            break;
        }
        case WM_DESTROY:
        {
            PreviousDisplayCleanup();
            DeleteObject(hBrokenImgIcon);
            hBrokenImgIcon = NULL;
            break;
        }
    }
    return FALSE;
}

VOID
CAppScrnshotPreview::DisplayLoading()
{
    SetStatus(SCRNSHOT_PREV_LOADING);
    if (bLoadingTimerOn)
    {
        KillTimer(TIMER_LOADING_ANIMATION);
    }
    LoadingAnimationFrame = 0;
    bLoadingTimerOn = TRUE;
    SetTimer(TIMER_LOADING_ANIMATION, 1000 / LOADING_ANIMATION_FPS, 0);
}

VOID
CAppScrnshotPreview::DisplayFailed()
{
    InterlockedIncrement64(&ContentID);
    SetStatus(SCRNSHOT_PREV_FAILED);
    PreviousDisplayCleanup();
}

BOOL
CAppScrnshotPreview::DisplayFile(LPCWSTR lpszFileName)
{
    PreviousDisplayCleanup();
    SetStatus(SCRNSHOT_PREV_IMAGE);
    pImage = Bitmap::FromFile(lpszFileName, 0);
    if (pImage->GetLastStatus() != Ok)
    {
        DisplayFailed();
        return FALSE;
    }
    return TRUE;
}

VOID
CAppScrnshotPreview::SetStatus(SCRNSHOT_STATUS Status)
{
    ScrnshotPrevStauts = Status;
}

VOID
CAppScrnshotPreview::PaintOnDC(HDC hdc, int width, int height, BOOL bDrawBkgnd)
{
    // use an off screen dc to avoid blinking
    HDC hdcMem = CreateCompatibleDC(hdc);
    HBITMAP hBitmap = CreateCompatibleBitmap(hdc, width, height);
    SelectObject(hdcMem, hBitmap);

    if (bDrawBkgnd)
    {
        HBRUSH hOldBrush = (HBRUSH)SelectObject(hdcMem, (HGDIOBJ)GetSysColorBrush(COLOR_BTNFACE));
        PatBlt(hdcMem, 0, 0, width, height, PATCOPY);
        SelectObject(hdcMem, hOldBrush);
    }

    switch (ScrnshotPrevStauts)
    {
        case SCRNSHOT_PREV_EMPTY:
        {
        }
        break;

        case SCRNSHOT_PREV_LOADING:
        {
            Graphics graphics(hdcMem);
            Color color(255, 0, 0);
            SolidBrush dotBrush(Color(255, 100, 100, 100));

            graphics.SetSmoothingMode(SmoothingMode::SmoothingModeAntiAlias);

            // Paint three dot
            float DotWidth = GetLoadingDotWidth(width, height);
            graphics.FillEllipse(
                (Brush *)(&dotBrush), (REAL)width / 2.0 - min(width, height) * 2.0 / 16.0 - DotWidth / 2.0,
                (REAL)height / 2.0 -
                    GetFrameDotShift(LoadingAnimationFrame + LOADING_ANIMATION_FPS / 4, width, height) - DotWidth / 2.0,
                DotWidth, DotWidth);

            graphics.FillEllipse(
                (Brush *)(&dotBrush), (REAL)width / 2.0 - DotWidth / 2.0,
                (REAL)height / 2.0 - GetFrameDotShift(LoadingAnimationFrame, width, height) - DotWidth / 2.0, DotWidth,
                DotWidth);

            graphics.FillEllipse(
                (Brush *)(&dotBrush), (REAL)width / 2.0 + min(width, height) * 2.0 / 16.0 - DotWidth / 2.0,
                (REAL)height / 2.0 -
                    GetFrameDotShift(LoadingAnimationFrame - LOADING_ANIMATION_FPS / 4, width, height) - DotWidth / 2.0,
                DotWidth, DotWidth);
        }
        break;

        case SCRNSHOT_PREV_IMAGE:
        {
            if (pImage)
            {
                // always draw entire image inside the window.
                Graphics graphics(hdcMem);
                float ZoomRatio =
                    min(((float)width / (float)pImage->GetWidth()), ((float)height / (float)pImage->GetHeight()));
                float ZoomedImgWidth = ZoomRatio * (float)pImage->GetWidth();
                float ZoomedImgHeight = ZoomRatio * (float)pImage->GetHeight();

                graphics.DrawImage(
                    pImage, ((float)width - ZoomedImgWidth) / 2.0, ((float)height - ZoomedImgHeight) / 2.0,
                    ZoomedImgWidth, ZoomedImgHeight);
            }
        }
        break;

        case SCRNSHOT_PREV_FAILED:
        {
            DrawIconEx(
                hdcMem, (width - BrokenImgSize) / 2, (height - BrokenImgSize) / 2, hBrokenImgIcon, BrokenImgSize,
                BrokenImgSize, NULL, NULL, DI_NORMAL | DI_COMPAT);
        }
        break;
    }

    // copy the content form off-screen dc to hdc
    BitBlt(hdc, 0, 0, width, height, hdcMem, 0, 0, SRCCOPY);
    DeleteDC(hdcMem);
    DeleteObject(hBitmap);
}

float
CAppScrnshotPreview::GetLoadingDotWidth(int width, int height)
{
    return min(width, height) / 20.0;
}

float
CAppScrnshotPreview::GetFrameDotShift(int Frame, int width, int height)
{
    return min(width, height) * (1.0 / 16.0) * (2.0 / (2.0 - sqrt(3.0))) *
           (max(sin((float)Frame * 2 * PI / (LOADING_ANIMATION_PERIOD * LOADING_ANIMATION_FPS)), sqrt(3.0) / 2.0) -
            sqrt(3.0) / 2.0);
}

ATL::CWndClassInfo &
CAppScrnshotPreview::GetWndClassInfo()
{
    DWORD csStyle = CS_VREDRAW | CS_HREDRAW;
    static ATL::CWndClassInfo wc = {
        {sizeof(WNDCLASSEX), csStyle, StartWindowProc, 0, 0, NULL, 0, LoadCursorW(NULL, IDC_ARROW),
         (HBRUSH)(COLOR_BTNFACE + 1), 0, L"RAppsScrnshotPreview", NULL},
        NULL,
        NULL,
        IDC_ARROW,
        TRUE,
        0,
        _T("")};
    return wc;
}

HWND
CAppScrnshotPreview::Create(HWND hParent)
{
    RECT r = {0, 0, 0, 0};

    return CWindowImpl::Create(hParent, r, L"", WS_CHILD | WS_VISIBLE);
}

VOID
CAppScrnshotPreview::PreviousDisplayCleanup()
{
    if (bLoadingTimerOn)
    {
        KillTimer(TIMER_LOADING_ANIMATION);
        bLoadingTimerOn = FALSE;
    }
    LoadingAnimationFrame = 0;
    if (pImage)
    {
        delete pImage;
        pImage = NULL;
    }
    if (AsyncInet)
    {
        AsyncInetCancel(AsyncInet);
    }
    if (!TempImagePath.IsEmpty())
    {
        DeleteFileW(TempImagePath.GetString());
        TempImagePath.Empty();
    }
}

VOID
CAppScrnshotPreview::DisplayEmpty()
{
    InterlockedIncrement64(&ContentID);
    SetStatus(SCRNSHOT_PREV_EMPTY);
    PreviousDisplayCleanup();
}

BOOL
CAppScrnshotPreview::DisplayImage(LPCWSTR lpszLocation)
{
    LONGLONG ID = InterlockedIncrement64(&ContentID);
    PreviousDisplayCleanup();

    if (PathIsURLW(lpszLocation))
    {
        DisplayLoading();

        ScrnshotDownloadParam *DownloadParam = new ScrnshotDownloadParam;
        if (!DownloadParam)
            return FALSE;

        DownloadParam->hwndNotify = m_hWnd;
        DownloadParam->ID = ID;
        // generate a filename
        CStringW ScrnshotFolder = m_BasePath;
        PathAppendW(ScrnshotFolder.GetBuffer(MAX_PATH), L"screenshots");
        ScrnshotFolder.ReleaseBuffer();

        if (!PathIsDirectoryW(ScrnshotFolder.GetString()))
        {
            CreateDirectoryW(ScrnshotFolder.GetString(), NULL);
        }

        if (!GetTempFileNameW(
                ScrnshotFolder.GetString(), L"img", 0, DownloadParam->DownloadFileName.GetBuffer(MAX_PATH)))
        {
            DownloadParam->DownloadFileName.ReleaseBuffer();
            delete DownloadParam;
            DisplayFailed();
            return FALSE;
        }
        DownloadParam->DownloadFileName.ReleaseBuffer();

        DownloadParam->hFile = CreateFileW(
            DownloadParam->DownloadFileName.GetString(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
            NULL);
        if (DownloadParam->hFile == INVALID_HANDLE_VALUE)
        {
            delete DownloadParam;
            DisplayFailed();
            return FALSE;
        }

        AsyncInet = AsyncInetDownload(
            0, INTERNET_OPEN_TYPE_PRECONFIG, 0, 0, lpszLocation, TRUE, ScrnshotDownloadCallback, DownloadParam);
        if (!AsyncInet)
        {
            CloseHandle(DownloadParam->hFile);
            DeleteFileW(DownloadParam->DownloadFileName.GetBuffer());
            delete DownloadParam;
            DisplayFailed();
            return FALSE;
        }
        return TRUE;
    }
    else
    {
        return DisplayFile(lpszLocation);
    }
}

int
CAppScrnshotPreview::GetRequestedWidth(int Height) // calculate requested window width by given height
{
    switch (ScrnshotPrevStauts)
    {
        case SCRNSHOT_PREV_EMPTY:
            return 0;
        case SCRNSHOT_PREV_LOADING:
            return 200;
        case SCRNSHOT_PREV_IMAGE:
            if (pImage)
            {
                // return the width needed to display image inside the window.
                // and always keep window w/h ratio inside [ 1/SCRNSHOT_MAX_ASPECT_RAT, SCRNSHOT_MAX_ASPECT_RAT ]
                return (int)floor(
                    (float)Height *
                    max(min((float)pImage->GetWidth() / (float)pImage->GetHeight(), (float)SCRNSHOT_MAX_ASPECT_RAT),
                        1.0 / (float)SCRNSHOT_MAX_ASPECT_RAT));
            }
            return 0;
        case SCRNSHOT_PREV_FAILED:
            return 200;
        default:
            return 0;
    }
}

CAppScrnshotPreview::~CAppScrnshotPreview()
{
    PreviousDisplayCleanup();
}
// **** CAppScrnshotPreview ****

// **** CAppInfoDisplay ****

BOOL
CAppInfoDisplay::ProcessWindowMessage(
    HWND hwnd,
    UINT message,
    WPARAM wParam,
    LPARAM lParam,
    LRESULT &theResult,
    DWORD dwMapId)
{
    theResult = 0;
    switch (message)
    {
        case WM_CREATE:
        {
            RichEdit = new CAppRichEdit();
            RichEdit->Create(hwnd);

            CStringW Directory;
            ::GetStorageDirectory(Directory);
            ScrnshotPrev = new CAppScrnshotPreview(Directory);
            ScrnshotPrev->Create(hwnd);
            break;
        }
        case WM_SIZE:
        {
            ResizeChildren(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
            break;
        }
        case WM_RAPPS_RESIZE_CHILDREN:
        {
            ResizeChildren();
            break;
        }
        case WM_COMMAND:
        {
            OnCommand(wParam, lParam);
            break;
        }
        case WM_NOTIFY:
        {
            NMHDR *NotifyHeader = (NMHDR *)lParam;
            if (NotifyHeader->hwndFrom == RichEdit->m_hWnd)
            {
                switch (NotifyHeader->code)
                {
                    case EN_LINK:
                        OnLink((ENLINK *)lParam);
                        break;
                }
            }
            break;
        }
    }

    return FALSE;
}

VOID
CAppInfoDisplay::ResizeChildren()
{
    CRect rect;
    GetWindowRect(&rect);
    ResizeChildren(rect.Width(), rect.Height());
}

VOID
CAppInfoDisplay::ResizeChildren(int Width, int Height)
{
    int ScrnshotWidth = ScrnshotPrev->GetRequestedWidth(Height);

    // make sure richedit always have room to display
    ScrnshotWidth = min(ScrnshotWidth, Width - INFO_DISPLAY_PADDING - RICHEDIT_MIN_WIDTH);

    DWORD dwError = ERROR_SUCCESS;
    HDWP hDwp = BeginDeferWindowPos(2);

    if (hDwp)
    {
        hDwp = ::DeferWindowPos(hDwp, ScrnshotPrev->m_hWnd, NULL, 0, 0, ScrnshotWidth, Height, 0);

        if (hDwp)
        {
            // hide the padding if scrnshot window width == 0
            int RicheditPosX = ScrnshotWidth ? (ScrnshotWidth + INFO_DISPLAY_PADDING) : 0;

            hDwp = ::DeferWindowPos(hDwp, RichEdit->m_hWnd, NULL, RicheditPosX, 0, Width - RicheditPosX, Height, 0);

            if (hDwp)
            {
                EndDeferWindowPos(hDwp);
            }
            else
            {
                dwError = GetLastError();
            }
        }
        else
        {
            dwError = GetLastError();
        }
    }
    else
    {
        dwError = GetLastError();
    }

#if DBG
    ATLASSERT(dwError == ERROR_SUCCESS);
#endif
    UNREFERENCED_PARAMETER(dwError);

    UpdateWindow();
}

VOID
CAppInfoDisplay::OnLink(ENLINK *Link)
{
    switch (Link->msg)
    {
        case WM_LBUTTONUP:
        case WM_RBUTTONUP:
        {
            if (pLink)
                HeapFree(GetProcessHeap(), 0, pLink);

            pLink = (LPWSTR)HeapAlloc(
                GetProcessHeap(), 0,
                (max(Link->chrg.cpMin, Link->chrg.cpMax) - min(Link->chrg.cpMin, Link->chrg.cpMax) + 1) *
                    sizeof(WCHAR));
            if (!pLink)
            {
                /* TODO: Error message */
                return;
            }

            RichEdit->SendMessageW(EM_SETSEL, Link->chrg.cpMin, Link->chrg.cpMax);
            RichEdit->SendMessageW(EM_GETSELTEXT, 0, (LPARAM)pLink);

            ShowPopupMenuEx(m_hWnd, m_hWnd, IDR_LINKMENU, -1);
        }
        break;
    }
}

ATL::CWndClassInfo &
CAppInfoDisplay::GetWndClassInfo()
{
    DWORD csStyle = CS_VREDRAW | CS_HREDRAW;
    static ATL::CWndClassInfo wc = {/*.m_wc=*/
                                    {/*cbSize=*/sizeof(WNDCLASSEX),
                                     /*style=*/csStyle,
                                     /*lpfnWndProc=*/StartWindowProc,
                                     /*cbClsExtra=*/0,
                                     /*cbWndExtra=*/0,
                                     /*hInstance=*/NULL,
                                     /*hIcon=*/NULL,
                                     /*hCursor*/ NULL,
                                     /*hbrBackground=*/(HBRUSH)(COLOR_BTNFACE + 1),
                                     /*lpszMenuName=*/NULL,
                                     /*lpszClassName=*/L"RAppsAppInfo",
                                     /*hIconSm=*/NULL},
                                    /*m_lpszOrigName=*/NULL,
                                    /*pWndProc=*/NULL,
                                    /*m_lpszCursorID=*/IDC_ARROW,
                                    /*m_bSystemCursor*/ TRUE,
                                    /*m_atom=*/0,
                                    /*m_szAutoName=*/_T("")};
    return wc;
}

HWND
CAppInfoDisplay::Create(HWND hwndParent)
{
    RECT r = {0, 0, 0, 0};

    return CWindowImpl::Create(hwndParent, r, L"", WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS);
}

VOID
CAppInfoDisplay::ShowAppInfo(CAppInfo *Info)
{
    CStringW ScrnshotLocation;
    if (Info->RetrieveScreenshot(ScrnshotLocation))
    {
        ScrnshotPrev->DisplayImage(ScrnshotLocation);
    }
    else
    {
        ScrnshotPrev->DisplayEmpty();
    }
    ResizeChildren();
    Info->ShowAppInfo(RichEdit);
}

VOID
CAppInfoDisplay::SetWelcomeText()
{
    ScrnshotPrev->DisplayEmpty();
    ResizeChildren();
    RichEdit->SetWelcomeText();
}

VOID
CAppInfoDisplay::OnCommand(WPARAM wParam, LPARAM lParam)
{
    WORD wCommand = LOWORD(wParam);

    switch (wCommand)
    {
        case ID_OPEN_LINK:

            ShellExecuteW(m_hWnd, L"open", pLink, NULL, NULL, SW_SHOWNOACTIVATE);
            HeapFree(GetProcessHeap(), 0, pLink);
            pLink = NULL;
            break;

        case ID_COPY_LINK:
            CopyTextToClipboard(pLink);
            HeapFree(GetProcessHeap(), 0, pLink);
            pLink = NULL;
            break;
    }
}

CAppInfoDisplay::~CAppInfoDisplay()
{
    delete RichEdit;
    delete ScrnshotPrev;
}
// **** CAppInfoDisplay ****

// **** CAppsListView ****

CAppsListView::CAppsListView()
{
}

CAppsListView::~CAppsListView()
{
    if (m_hImageListView)
    {
        ImageList_Destroy(m_hImageListView);
    }
}

LRESULT
CAppsListView::OnEraseBackground(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL &bHandled)
{
    LRESULT lRes = this->DefWindowProc(uMsg, wParam, lParam);
    if (!m_Watermark.IsEmpty())
    {
        RECT rc;
        GetClientRect(&rc);
        HGDIOBJ oldFont = SelectFont(HDC(wParam), GetStockFont(DEFAULT_GUI_FONT));
        DrawShadowText(
            HDC(wParam), m_Watermark.GetString(), m_Watermark.GetLength(), &rc,
            DT_CENTER | DT_VCENTER | DT_NOPREFIX | DT_SINGLELINE, GetSysColor(COLOR_GRAYTEXT),
            GetSysColor(COLOR_GRAYTEXT), 1, 1);
        SelectFont(HDC(wParam), oldFont);
    }
    return lRes;
}

VOID
CAppsListView::SetWatermark(const CStringW &Text)
{
    m_Watermark = Text;
}

VOID
CAppsListView::SetCheckboxesVisible(BOOL bIsVisible)
{
    if (bIsVisible)
    {
        SetExtendedListViewStyle(LVS_EX_CHECKBOXES | LVS_EX_FULLROWSELECT);
    }
    else
    {
        SetExtendedListViewStyle(LVS_EX_FULLROWSELECT);
    }

    bHasCheckboxes = bIsVisible;
}

VOID
CAppsListView::ColumnClick(LPNMLISTVIEW pnmv)
{
    HWND hHeader;
    HDITEMW hColumn;
    INT nHeaderID = pnmv->iSubItem;

    if ((GetWindowLongPtr(GWL_STYLE) & ~LVS_NOSORTHEADER) == 0)
        return;

    hHeader = (HWND)SendMessage(LVM_GETHEADER, 0, 0);
    ZeroMemory(&hColumn, sizeof(hColumn));

    /* If the sorting column changed, remove the sorting style from the old column */
    if ((nLastHeaderID != -1) && (nLastHeaderID != nHeaderID))
    {
        bIsAscending = TRUE; // also reset sorting method to ascending
        hColumn.mask = HDI_FORMAT;
        Header_GetItem(hHeader, nLastHeaderID, &hColumn);
        hColumn.fmt &= ~(HDF_SORTUP | HDF_SORTDOWN);
        Header_SetItem(hHeader, nLastHeaderID, &hColumn);
    }

    /* Set the sorting style to the new column */
    hColumn.mask = HDI_FORMAT;
    Header_GetItem(hHeader, nHeaderID, &hColumn);

    hColumn.fmt &= ~(HDF_SORTDOWN | HDF_SORTUP);
    hColumn.fmt |= (bIsAscending ? HDF_SORTUP : HDF_SORTDOWN);
    Header_SetItem(hHeader, nHeaderID, &hColumn);

    /* Sort the list, using the current values of nHeaderID and bIsAscending */
    SortContext ctx = {this, nHeaderID};
    SortItems(s_CompareFunc, &ctx);

    /* Save new values */
    nLastHeaderID = nHeaderID;
    bIsAscending = !bIsAscending;
}

BOOL
CAppsListView::AddColumn(INT Index, CStringW &Text, INT Width, INT Format)
{
    LVCOLUMNW Column;

    ZeroMemory(&Column, sizeof(Column));

    Column.mask = LVCF_FMT | LVCF_TEXT | LVCF_WIDTH | LVCF_SUBITEM;
    Column.iSubItem = Index;
    Column.pszText = const_cast<LPWSTR>(Text.GetString());
    Column.cx = Width;
    Column.fmt = Format;

    return SendMessage(LVM_INSERTCOLUMN, Index, (LPARAM)(&Column));
}

void
CAppsListView::DeleteColumn(INT Index)
{
    SendMessage(LVM_DELETECOLUMN, Index, 0);
    return;
}

INT
CAppsListView::AddItem(INT ItemIndex, INT IconIndex, LPCWSTR lpText, LPARAM lParam)
{
    LVITEMW Item;

    ZeroMemory(&Item, sizeof(Item));

    Item.mask = LVIF_TEXT | LVIF_PARAM | LVIF_STATE;
    Item.pszText = const_cast<LPWSTR>(lpText);
    Item.lParam = lParam;
    Item.iItem = ItemIndex;
    Item.iImage = IconIndex;

    if (IconIndex >= 0)
    {
        Item.iImage = IconIndex;
        Item.mask |= LVIF_IMAGE;
    }
    return InsertItem(&Item);
}

HIMAGELIST
CAppsListView::GetImageList(int iImageList)
{
    return (HIMAGELIST)SendMessage(LVM_GETIMAGELIST, iImageList, 0);
}

INT CALLBACK
CAppsListView::s_CompareFunc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)
{
    SortContext *ctx = ((SortContext *)lParamSort);
    return ctx->lvw->CompareFunc(lParam1, lParam2, ctx->iSubItem);
}

INT
CAppsListView::CompareFunc(LPARAM lParam1, LPARAM lParam2, INT iSubItem)
{
    CStringW Item1, Item2;
    LVFINDINFOW IndexInfo;
    INT Index;

    IndexInfo.flags = LVFI_PARAM;

    IndexInfo.lParam = lParam1;
    Index = FindItem(-1, &IndexInfo);
    GetItemText(Index, iSubItem, Item1.GetBuffer(MAX_STR_LEN), MAX_STR_LEN);
    Item1.ReleaseBuffer();

    IndexInfo.lParam = lParam2;
    Index = FindItem(-1, &IndexInfo);
    GetItemText(Index, iSubItem, Item2.GetBuffer(MAX_STR_LEN), MAX_STR_LEN);
    Item2.ReleaseBuffer();

    return bIsAscending ? Item1.Compare(Item2) : Item2.Compare(Item1);
}

HWND
CAppsListView::Create(HWND hwndParent)
{
    RECT r = {205, 28, 465, 250};
    DWORD style = WS_CHILD | WS_VISIBLE | LVS_SORTASCENDING | LVS_REPORT | LVS_SINGLESEL | LVS_SHOWSELALWAYS |
                  LVS_AUTOARRANGE | LVS_SHAREIMAGELISTS;

    HWND hwnd = CListView::Create(hwndParent, r, NULL, style, WS_EX_CLIENTEDGE);

    if (hwnd)
    {
        SetCheckboxesVisible(FALSE);
    }

    m_hImageListView = ImageList_Create(LISTVIEW_ICON_SIZE, LISTVIEW_ICON_SIZE, GetSystemColorDepth() | ILC_MASK, 0, 1);

    SetImageList(m_hImageListView, LVSIL_SMALL);
    SetImageList(m_hImageListView, LVSIL_NORMAL);

#pragma push_macro("SubclassWindow")
#undef SubclassWindow
    m_hWnd = NULL;
    SubclassWindow(hwnd);
#pragma pop_macro("SubclassWindow")

    return hwnd;
}

BOOL
CAppsListView::GetCheckState(INT item)
{
    return (BOOL)(GetItemState(item, LVIS_STATEIMAGEMASK) >> 12) - 1;
}

VOID
CAppsListView::SetCheckState(INT item, BOOL fCheck)
{
    if (bHasCheckboxes)
    {
        SetItemState(item, INDEXTOSTATEIMAGEMASK((fCheck) ? 2 : 1), LVIS_STATEIMAGEMASK);
    }
}

VOID
CAppsListView::CheckAll()
{
    if (bHasCheckboxes)
    {
        if (CheckedItemCount == ItemCount)
        {
            // clear all
            SetCheckState(-1, FALSE);
        }
        else
        {
            // check all
            SetCheckState(-1, TRUE);
        }
    }
}

PVOID
CAppsListView::GetFocusedItemData()
{
    INT item = GetSelectionMark();
    if (item == -1)
    {
        return (PVOID)0;
    }
    return (PVOID)GetItemData(item);
}

BOOL
CAppsListView::SetDisplayAppType(APPLICATION_VIEW_TYPE AppType)
{
    if (!DeleteAllItems())
        return FALSE;
    ApplicationViewType = AppType;

    bIsAscending = TRUE;

    ItemCount = 0;
    CheckedItemCount = 0;

    // delete old columns
    while (ColumnCount)
    {
        DeleteColumn(--ColumnCount);
    }

    ImageList_RemoveAll(m_hImageListView);

    // add new columns
    CStringW szText;
    switch (AppType)
    {
        case AppViewTypeInstalledApps:

            /* Add columns to ListView */
            szText.LoadStringW(IDS_APP_NAME);
            AddColumn(ColumnCount++, szText, 250, LVCFMT_LEFT);

            szText.LoadStringW(IDS_APP_INST_VERSION);
            AddColumn(ColumnCount++, szText, 90, LVCFMT_RIGHT);

            szText.LoadStringW(IDS_APP_DESCRIPTION);
            AddColumn(ColumnCount++, szText, 300, LVCFMT_LEFT);

            // disable checkboxes
            SetCheckboxesVisible(FALSE);
            break;

        case AppViewTypeAvailableApps:

            /* Add columns to ListView */
            szText.LoadStringW(IDS_APP_NAME);
            AddColumn(ColumnCount++, szText, 250, LVCFMT_LEFT);

            szText.LoadStringW(IDS_APP_INST_VERSION);
            AddColumn(ColumnCount++, szText, 90, LVCFMT_RIGHT);

            szText.LoadStringW(IDS_APP_DESCRIPTION);
            AddColumn(ColumnCount++, szText, 300, LVCFMT_LEFT);

            // enable checkboxes
            SetCheckboxesVisible(TRUE);
            break;

        default:
            break;
    }

    return TRUE;
}

BOOL
CAppsListView::SetViewMode(DWORD ViewMode)
{
    return SendMessage(LVM_SETVIEW, (WPARAM)ViewMode, 0) == 1;
}

BOOL
CAppsListView::AddApplication(CAppInfo *AppInfo, BOOL InitialCheckState)
{
    if (ApplicationViewType == AppViewTypeInstalledApps)
    {
        /* Load icon from registry */
        HICON hIcon = NULL;
        CStringW szIconPath;
        int IconIndex;
        if (AppInfo->RetrieveIcon(szIconPath))
        {
            IconIndex = PathParseIconLocationW(szIconPath.GetBuffer());
            szIconPath.ReleaseBuffer();

            ExtractIconExW(szIconPath.GetString(), IconIndex, &hIcon, NULL, 1);
        }

        /* Use the default icon if none were found in the file, or if it is not supported (returned 1) */
        if (!hIcon || (hIcon == (HICON)1))
        {
            /* Load default icon */
            hIcon = LoadIconW(hInst, MAKEINTRESOURCEW(IDI_MAIN));
        }

        IconIndex = ImageList_AddIcon(m_hImageListView, hIcon);
        DestroyIcon(hIcon);

        int Index = AddItem(ItemCount, IconIndex, AppInfo->szDisplayName, (LPARAM)AppInfo);
        SetItemText(Index, 1, AppInfo->szDisplayVersion.IsEmpty() ? L"---" : AppInfo->szDisplayVersion);
        SetItemText(Index, 2, AppInfo->szComments.IsEmpty() ? L"---" : AppInfo->szComments);

        ItemCount++;
        return TRUE;
    }
    else if (ApplicationViewType == AppViewTypeAvailableApps)
    {
        /* Load icon from file */
        HICON hIcon = NULL;
        CStringW szIconPath;
        if (AppInfo->RetrieveIcon(szIconPath))
        {
            hIcon = (HICON)LoadImageW(
                NULL, szIconPath, IMAGE_ICON, LISTVIEW_ICON_SIZE, LISTVIEW_ICON_SIZE, LR_LOADFROMFILE);
        }

        if (!hIcon)
        {
            /* Load default icon */
            hIcon = LoadIconW(hInst, MAKEINTRESOURCEW(IDI_MAIN));
        }

        int IconIndex = ImageList_AddIcon(m_hImageListView, hIcon);
        DestroyIcon(hIcon);

        int Index = AddItem(ItemCount, IconIndex, AppInfo->szDisplayName, (LPARAM)AppInfo);

        if (InitialCheckState)
        {
            SetCheckState(Index, TRUE);
        }

        SetItemText(Index, 1, AppInfo->szDisplayVersion);
        SetItemText(Index, 2, AppInfo->szComments);

        ItemCount++;
        return TRUE;
    }
    else
    {
        return FALSE;
    }
}

// this function is called when parent window receiving an notification about checkstate changing
VOID
CAppsListView::ItemCheckStateNotify(int iItem, BOOL bCheck)
{
    if (bCheck)
    {
        CheckedItemCount++;
    }
    else
    {
        CheckedItemCount--;
    }
}
// **** CAppsListView ****

// **** CApplicationView ****

BOOL
CApplicationView::ProcessWindowMessage(
    HWND hwnd,
    UINT message,
    WPARAM wParam,
    LPARAM lParam,
    LRESULT &theResult,
    DWORD dwMapId)
{
    theResult = 0;
    switch (message)
    {
        case WM_CREATE:
        {
            BOOL bSuccess = TRUE;
            m_Panel = new CUiPanel();
            m_Panel->m_VerticalAlignment = UiAlign_Stretch;
            m_Panel->m_HorizontalAlignment = UiAlign_Stretch;

            bSuccess &= CreateToolbar();
            bSuccess &= CreateSearchBar();
            bSuccess &= CreateComboBox();
            bSuccess &= CreateHSplitter();
            bSuccess &= CreateListView();
            bSuccess &= CreateAppInfoDisplay();

            m_Toolbar->AutoSize();

            RECT rTop;

            ::GetWindowRect(m_Toolbar->m_hWnd, &rTop);
            m_HSplitter->m_Margin.top = rTop.bottom - rTop.top;
            if (!bSuccess)
            {
                return -1; // creation failure
            }
        }
        break;

        case WM_NOTIFY:
        {
            LPNMHDR pNotifyHeader = (LPNMHDR)lParam;
            if (pNotifyHeader->hwndFrom == m_ListView->GetWindow())
            {
                switch (pNotifyHeader->code)
                {
                    case LVN_ITEMCHANGED:
                    {
                        LPNMLISTVIEW pnic = (LPNMLISTVIEW)lParam;

                        /* Check if this is a valid item
                         * (technically, it can be also an unselect) */
                        INT ItemIndex = pnic->iItem;
                        if (ItemIndex == -1 || ItemIndex >= ListView_GetItemCount(pnic->hdr.hwndFrom))
                        {
                            break;
                        }

                        /* Check if the focus has been moved to another item */
                        if ((pnic->uChanged & LVIF_STATE) && (pnic->uNewState & LVIS_FOCUSED) &&
                            !(pnic->uOldState & LVIS_FOCUSED))
                        {
                            ItemGetFocus((LPVOID)pnic->lParam);
                        }

                        /* Check if the item is checked/unchecked */
                        if (pnic->uChanged & LVIF_STATE)
                        {
                            int iOldState = STATEIMAGETOINDEX(pnic->uOldState);
                            int iNewState = STATEIMAGETOINDEX(pnic->uNewState);

                            if (iOldState == STATEIMAGE_UNCHECKED && iNewState == STATEIMAGE_CHECKED)
                            {
                                // this item is just checked
                                m_ListView->ItemCheckStateNotify(pnic->iItem, TRUE);
                                ItemCheckStateChanged(TRUE, (LPVOID)pnic->lParam);
                            }
                            else if (iOldState == STATEIMAGE_CHECKED && iNewState == STATEIMAGE_UNCHECKED)
                            {
                                // this item is just unchecked
                                m_ListView->ItemCheckStateNotify(pnic->iItem, FALSE);
                                ItemCheckStateChanged(FALSE, (LPVOID)pnic->lParam);
                            }
                        }
                    }
                    break;

                    case LVN_COLUMNCLICK:
                    {
                        LPNMLISTVIEW pnmv = (LPNMLISTVIEW)lParam;

                        m_ListView->ColumnClick(pnmv);
                    }
                    break;

                    case NM_DBLCLK:
                    {
                        LPNMITEMACTIVATE Item = (LPNMITEMACTIVATE)lParam;
                        if (Item->iItem != -1)
                        {
                            /* this won't do anything if the program is already installed */

                            if (ApplicationViewType == AppViewTypeAvailableApps)
                            {
                                m_MainWindow->InstallApplication(
                                    (CAppInfo *)m_ListView->GetItemData(Item->iItem));
                            }
                        }
                    }
                    break;

                    case NM_RCLICK:
                    {
                        if (((LPNMLISTVIEW)lParam)->iItem != -1)
                        {
                            ShowPopupMenuEx(m_hWnd, m_hWnd, 0, ID_INSTALL);
                        }
                    }
                    break;
                }
            }
            else if (pNotifyHeader->hwndFrom == m_Toolbar->GetWindow())
            {
                switch (pNotifyHeader->code)
                {
                    case TTN_GETDISPINFO:
                        m_Toolbar->OnGetDispInfo((LPTOOLTIPTEXT)lParam);
                        break;
                }
            }
        }
        break;

        case WM_SYSCOLORCHANGE:
        {
            /* Forward WM_SYSCOLORCHANGE to common controls */
            m_ListView->SendMessageW(WM_SYSCOLORCHANGE, wParam, lParam);
            m_ListView->SendMessageW(EM_SETBKGNDCOLOR, 0, GetSysColor(COLOR_BTNFACE));
            m_Toolbar->SendMessageW(WM_SYSCOLORCHANGE, wParam, lParam);
            m_ComboBox->SendMessageW(WM_SYSCOLORCHANGE, wParam, lParam);
        }
        break;

        case WM_SIZE:
        {
            OnSize(hwnd, wParam, lParam);
            break;
        }

        case WM_COMMAND:
        {
            OnCommand(wParam, lParam);
        }
        break;
    }
    return FALSE;
}

BOOL
CApplicationView::CreateToolbar()
{
    m_Toolbar = new CMainToolbar();
    m_Toolbar->m_VerticalAlignment = UiAlign_LeftTop;
    m_Toolbar->m_HorizontalAlignment = UiAlign_Stretch;
    m_Panel->Children().Append(m_Toolbar);

    return m_Toolbar->Create(m_hWnd) != NULL;
}

BOOL
CApplicationView::CreateSearchBar()
{
    m_SearchBar = new CUiWindow<CSearchBar>();
    m_SearchBar->m_VerticalAlignment = UiAlign_LeftTop;
    m_SearchBar->m_HorizontalAlignment = UiAlign_RightBtm;
    m_SearchBar->m_Margin.top = 4;
    m_SearchBar->m_Margin.right = TOOLBAR_PADDING;

    return m_SearchBar->Create(m_Toolbar->m_hWnd) != NULL;
}

BOOL
CApplicationView::CreateComboBox()
{
    m_ComboBox = new CUiWindow<CComboBox>();
    m_ComboBox->m_VerticalAlignment = UiAlign_LeftTop;
    m_ComboBox->m_HorizontalAlignment = UiAlign_RightBtm;
    m_ComboBox->m_Margin.top = 4;

    return m_ComboBox->Create(m_Toolbar->m_hWnd) != NULL;
}

BOOL
CApplicationView::CreateHSplitter()
{
    m_HSplitter = new CUiSplitPanel();
    m_HSplitter->m_VerticalAlignment = UiAlign_Stretch;
    m_HSplitter->m_HorizontalAlignment = UiAlign_Stretch;
    m_HSplitter->m_DynamicFirst = TRUE;
    m_HSplitter->m_Horizontal = TRUE;
    m_HSplitter->m_Pos = INT_MAX; // set INT_MAX to use lowest possible position (m_MinSecond)
    m_HSplitter->m_MinFirst = 10;
    m_HSplitter->m_MinSecond = 140;
    m_Panel->Children().Append(m_HSplitter);

    return m_HSplitter->Create(m_hWnd) != NULL;
}

BOOL
CApplicationView::CreateListView()
{
    m_ListView = new CAppsListView();
    m_ListView->m_VerticalAlignment = UiAlign_Stretch;
    m_ListView->m_HorizontalAlignment = UiAlign_Stretch;
    m_HSplitter->First().Append(m_ListView);

    return m_ListView->Create(m_hWnd) != NULL;
}

BOOL
CApplicationView::CreateAppInfoDisplay()
{
    m_AppsInfo = new CAppInfoDisplay();
    m_AppsInfo->m_VerticalAlignment = UiAlign_Stretch;
    m_AppsInfo->m_HorizontalAlignment = UiAlign_Stretch;
    m_HSplitter->Second().Append(m_AppsInfo);

    return m_AppsInfo->Create(m_hWnd) != NULL;
}

void
CApplicationView::SetRedraw(BOOL bRedraw)
{
    CWindow::SetRedraw(bRedraw);
    m_ListView->SetRedraw(bRedraw);
}

void
CApplicationView::SetFocusOnSearchBar()
{
    m_SearchBar->SetFocus();
}

VOID
CApplicationView::OnSize(HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    if (wParam == SIZE_MINIMIZED)
        return;

    /* Size tool bar */
    m_Toolbar->AutoSize();

    /* Automatically hide captions */
    DWORD dToolbarTreshold = m_Toolbar->GetMaxButtonsWidth();
    DWORD dSearchbarMargin = (LOWORD(lParam) - m_SearchBar->m_Width - m_ComboBox->m_Width - TOOLBAR_PADDING * 2);

    if (dSearchbarMargin > dToolbarTreshold)
    {
        m_Toolbar->ShowButtonCaption();
    }
    else if (dSearchbarMargin < dToolbarTreshold)
    {
        m_Toolbar->HideButtonCaption();
    }

    RECT r = {0, 0, LOWORD(lParam), HIWORD(lParam)};
    HDWP hdwp = NULL;
    INT count = m_Panel->CountSizableChildren();

    hdwp = BeginDeferWindowPos(count);
    if (hdwp)
    {
        hdwp = m_Panel->OnParentSize(r, hdwp);
        if (hdwp)
        {
            EndDeferWindowPos(hdwp);
        }
    }

    count = m_SearchBar->CountSizableChildren();
    hdwp = BeginDeferWindowPos(count);
    if (hdwp)
    {
        hdwp = m_SearchBar->OnParentSize(r, hdwp);
        if (hdwp)
        {
            EndDeferWindowPos(hdwp);
        }
    }

    m_ComboBox->m_Margin.right = m_SearchBar->m_Width + m_SearchBar->m_Margin.right + TOOLBAR_PADDING;
    count = m_ComboBox->CountSizableChildren();
    hdwp = BeginDeferWindowPos(count);
    if (hdwp)
    {
        hdwp = m_ComboBox->OnParentSize(r, hdwp);
        if (hdwp)
        {
            EndDeferWindowPos(hdwp);
        }
    }
}

VOID
CApplicationView::OnCommand(WPARAM wParam, LPARAM lParam)
{
    if (lParam)
    {
        if ((HWND)lParam == m_SearchBar->GetWindow())
        {
            CStringW szBuf;
            switch (HIWORD(wParam))
            {
                case EN_SETFOCUS:
                {
                    CStringW szWndText;

                    szBuf.LoadStringW(IDS_SEARCH_TEXT);
                    m_SearchBar->GetWindowTextW(szWndText);
                    if (szBuf == szWndText)
                    {
                        m_SearchBar->SetWindowTextW(L"");
                    }
                }
                break;

                case EN_KILLFOCUS:
                {
                    m_SearchBar->GetWindowTextW(szBuf);
                    if (szBuf.IsEmpty())
                    {
                        szBuf.LoadStringW(IDS_SEARCH_TEXT);
                        m_SearchBar->SetWindowTextW(szBuf.GetString());
                    }
                }
                break;

                case EN_CHANGE:
                {
                    CStringW szWndText;

                    szBuf.LoadStringW(IDS_SEARCH_TEXT);
                    m_SearchBar->GetWindowTextW(szWndText);
                    if (szBuf == szWndText)
                    {
                        szWndText = L"";
                        m_MainWindow->SearchTextChanged(szWndText);
                    }
                    else
                    {
                        m_MainWindow->SearchTextChanged(szWndText);
                    }
                }
                break;
            }

            return;
        }
        else if ((HWND)lParam == m_ComboBox->GetWindow())
        {
            int NotifyCode = HIWORD(wParam);
            switch (NotifyCode)
            {
                case CBN_SELCHANGE:
                    int CurrSelection = m_ComboBox->SendMessageW(CB_GETCURSEL);

                    int ViewModeList[] = {LV_VIEW_DETAILS, LV_VIEW_LIST, LV_VIEW_TILE};
                    ATLASSERT(CurrSelection < (int)_countof(ViewModeList));
                    if (!m_ListView->SetViewMode(ViewModeList[CurrSelection]))
                    {
                        MessageBoxW(L"View mode invalid or unimplemented");
                    }
                    break;
            }

            return;
        }
        else if ((HWND)lParam == m_Toolbar->GetWindow())
        {
            // the message is sent from Toolbar. fall down to continue process
        }
        else
        {
            return;
        }
    }

    // the LOWORD of wParam contains a Menu or Control ID
    WORD wCommand = LOWORD(wParam);

    switch (wCommand)
    {
        case ID_INSTALL:
        case ID_UNINSTALL:
        case ID_MODIFY:
        case ID_REGREMOVE:
        case ID_REFRESH:
        case ID_RESETDB:
        case ID_CHECK_ALL:
            m_MainWindow->SendMessageW(WM_COMMAND, wCommand, 0);
            break;
    }
}

CApplicationView::CApplicationView(CMainWindow *MainWindow) : m_MainWindow(MainWindow)
{
}

CApplicationView::~CApplicationView()
{
    delete m_Toolbar;
    delete m_SearchBar;
    delete m_ListView;
    delete m_AppsInfo;
    delete m_HSplitter;
}

ATL::CWndClassInfo &
CApplicationView::GetWndClassInfo()
{
    DWORD csStyle = CS_VREDRAW | CS_HREDRAW;
    static ATL::CWndClassInfo wc = {
        {sizeof(WNDCLASSEX), csStyle, StartWindowProc, 0, 0, NULL, NULL, NULL, (HBRUSH)(COLOR_BTNFACE + 1), NULL,
         L"RAppsApplicationView", NULL},
        NULL,
        NULL,
        IDC_ARROW,
        TRUE,
        0,
        _T("")};
    return wc;
}

HWND
CApplicationView::Create(HWND hwndParent)
{
    RECT r = {0, 0, 0, 0};

    HMENU menu = GetSubMenu(LoadMenuW(hInst, MAKEINTRESOURCEW(IDR_APPLICATIONMENU)), 0);

    return CWindowImpl::Create(hwndParent, r, L"", WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS, 0, menu);
}

BOOL
CApplicationView::SetDisplayAppType(APPLICATION_VIEW_TYPE AppType)
{
    if (!m_ListView->SetDisplayAppType(AppType))
    {
        return FALSE;
    }
    ApplicationViewType = AppType;
    m_AppsInfo->SetWelcomeText();

    HMENU hMenu = ::GetMenu(m_hWnd);
    switch (AppType)
    {
        case AppViewTypeInstalledApps:
            EnableMenuItem(hMenu, ID_REGREMOVE, MF_ENABLED);
            EnableMenuItem(hMenu, ID_INSTALL, MF_GRAYED);
            EnableMenuItem(hMenu, ID_UNINSTALL, MF_ENABLED);
            EnableMenuItem(hMenu, ID_MODIFY, MF_ENABLED);

            m_Toolbar->SendMessageW(TB_ENABLEBUTTON, ID_INSTALL, FALSE);
            m_Toolbar->SendMessageW(TB_ENABLEBUTTON, ID_UNINSTALL, TRUE);
            m_Toolbar->SendMessageW(TB_ENABLEBUTTON, ID_MODIFY, TRUE);
            break;

        case AppViewTypeAvailableApps:
            EnableMenuItem(hMenu, ID_REGREMOVE, MF_GRAYED);
            EnableMenuItem(hMenu, ID_INSTALL, MF_ENABLED);
            EnableMenuItem(hMenu, ID_UNINSTALL, MF_GRAYED);
            EnableMenuItem(hMenu, ID_MODIFY, MF_GRAYED);

            m_Toolbar->SendMessageW(TB_ENABLEBUTTON, ID_INSTALL, TRUE);
            m_Toolbar->SendMessageW(TB_ENABLEBUTTON, ID_UNINSTALL, FALSE);
            m_Toolbar->SendMessageW(TB_ENABLEBUTTON, ID_MODIFY, FALSE);
            break;
    }
    return TRUE;
}

BOOL
CApplicationView::AddApplication(CAppInfo *AppInfo, BOOL InitialCheckState)
{
    return m_ListView->AddApplication(AppInfo, InitialCheckState);
}

VOID
CApplicationView::SetWatermark(const CStringW &Text)
{
    m_ListView->SetWatermark(Text);
}

void
CApplicationView::CheckAll()
{
    m_ListView->CheckAll();
}

PVOID
CApplicationView::GetFocusedItemData()
{
    return m_ListView->GetFocusedItemData();
}

int
CApplicationView::GetItemCount()
{
    return m_ListView->GetItemCount();
}

VOID
CApplicationView::AppendTabOrderWindow(int Direction, ATL::CSimpleArray<HWND> &TabOrderList)
{
    m_Toolbar->AppendTabOrderWindow(Direction, TabOrderList);
    m_ComboBox->AppendTabOrderWindow(Direction, TabOrderList);
    m_SearchBar->AppendTabOrderWindow(Direction, TabOrderList);
    m_ListView->AppendTabOrderWindow(Direction, TabOrderList);
    m_AppsInfo->AppendTabOrderWindow(Direction, TabOrderList);
}

// this function is called when a item of listview get focus.
// CallbackParam is the param passed to listview when adding the item (the one getting focus now).
VOID
CApplicationView::ItemGetFocus(LPVOID CallbackParam)
{
    if (CallbackParam)
    {
        CAppInfo *Info = static_cast<CAppInfo *>(CallbackParam);
        m_AppsInfo->ShowAppInfo(Info);

        if (ApplicationViewType == AppViewTypeInstalledApps)
        {
            HMENU hMenu = ::GetMenu(m_hWnd);

            BOOL CanModify = Info->CanModify();

            EnableMenuItem(hMenu, ID_MODIFY, CanModify ? MF_ENABLED : MF_GRAYED);
            m_Toolbar->SendMessageW(TB_ENABLEBUTTON, ID_MODIFY, CanModify);
        }
    }
}

// this function is called when a item of listview is checked/unchecked
// CallbackParam is the param passed to listview when adding the item (the one getting changed now).
VOID
CApplicationView::ItemCheckStateChanged(BOOL bChecked, LPVOID CallbackParam)
{
    m_MainWindow->ItemCheckStateChanged(bChecked, CallbackParam);
}
// **** CApplicationView ****