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https://github.com/reactos/reactos.git
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[EXPLORER] Add 'Show Desktop' button at right edge of taskbar (#4715)
This PR adds a tiny button of window class "TrayShowDesktopButtonWClass" at right/bottom edge of taskbar. This button allows the user to access "Show/Restore Desktop" feature by mouse. You can toggle visibility of this button by registry value "TaskbarSd" in key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced". The button is themed when theme is available. CORE-15369
This commit is contained in:
Katayama Hirofumi MZ
GitHub
parent
34635e1585
commit
26efda4d8d
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@ -2,7 +2,7 @@
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* ReactOS Explorer
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*
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* Copyright 2006 - 2007 Thomas Weidenmueller <w3seek@reactos.org>
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* Copyright 2018 Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>
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* Copyright 2018-2022 Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>
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*
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* this library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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@ -264,6 +264,200 @@ public:
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};
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// This window class name is CONFIRMED on Win10 by WinHier.
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static const WCHAR szTrayShowDesktopButton[] = L"TrayShowDesktopButtonWClass";
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// The 'Show Desktop' button at edge of taskbar
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class CTrayShowDesktopButton :
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public CWindowImpl<CTrayShowDesktopButton, CWindow, CControlWinTraits>
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{
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LONG m_nClickedTime;
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BOOL m_bHovering;
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HTHEME m_hTheme;
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public:
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DECLARE_WND_CLASS_EX(szTrayShowDesktopButton, CS_HREDRAW | CS_VREDRAW, COLOR_3DFACE)
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CTrayShowDesktopButton() : m_nClickedTime(0), m_bHovering(FALSE)
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{
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}
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INT WidthOrHeight() const
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{
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#define SHOW_DESKTOP_MINIMUM_WIDTH 3
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INT cxy = 2 * ::GetSystemMetrics(SM_CXEDGE);
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return max(cxy, SHOW_DESKTOP_MINIMUM_WIDTH);
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}
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HRESULT DoCreate(HWND hwndParent)
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{
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DWORD style = WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS;
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Create(hwndParent, NULL, NULL, style);
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if (!m_hWnd)
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return E_FAIL;
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::SetWindowTheme(m_hWnd, L"TaskBar", NULL);
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return S_OK;
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}
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LRESULT OnClick(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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{
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// The actual action can be delayed as an expected behaviour.
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// But a too late action is an unexpected behaviour.
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LONG nTime0 = m_nClickedTime;
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LONG nTime1 = ::GetMessageTime();
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if (nTime1 - nTime0 >= 600) // Ignore after 0.6 sec
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return 0;
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// Show/Hide Desktop
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::SendMessageW(::GetParent(m_hWnd), WM_COMMAND, TRAYCMD_TOGGLE_DESKTOP, 0);
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return 0;
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}
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#define TSDB_CLICK (WM_USER + 100)
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// This function is called from OnLButtonDown and parent.
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VOID Click()
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{
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// The actual action can be delayed as an expected behaviour.
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m_nClickedTime = ::GetMessageTime();
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PostMessage(TSDB_CLICK, 0, 0);
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}
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LRESULT OnLButtonDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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{
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Click(); // Left-click
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return 0;
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}
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LRESULT OnSettingChanged(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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{
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if (m_hTheme)
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::CloseThemeData(m_hTheme);
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m_hTheme = ::OpenThemeData(m_hWnd, L"TaskBar");
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InvalidateRect(NULL, TRUE);
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return 0;
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}
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// This function is called from OnPaint and parent.
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VOID OnDraw(HDC hdc, LPRECT prc);
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LRESULT OnPaint(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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{
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RECT rc;
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GetClientRect(&rc);
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PAINTSTRUCT ps;
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HDC hdc = BeginPaint(&ps);
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OnDraw(hdc, &rc);
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EndPaint(&ps);
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return 0;
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}
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BOOL PtInButton(POINT pt)
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{
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RECT rc;
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GetWindowRect(&rc);
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INT cxEdge = ::GetSystemMetrics(SM_CXEDGE), cyEdge = ::GetSystemMetrics(SM_CYEDGE);
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::InflateRect(&rc, max(cxEdge, 1), max(cyEdge, 1));
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return ::PtInRect(&rc, pt);
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}
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#define SHOW_DESKTOP_TIMER_ID 999
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#define SHOW_DESKTOP_TIMER_INTERVAL 200
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VOID StartHovering()
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{
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if (m_bHovering)
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return;
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m_bHovering = TRUE;
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SetTimer(SHOW_DESKTOP_TIMER_ID, SHOW_DESKTOP_TIMER_INTERVAL, NULL);
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InvalidateRect(NULL, TRUE);
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::SendMessageW(::GetParent(m_hWnd), WM_NCPAINT, 0, 0);
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}
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LRESULT OnMouseMove(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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{
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StartHovering();
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return 0;
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}
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LRESULT OnTimer(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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{
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if (wParam != SHOW_DESKTOP_TIMER_ID || !m_bHovering)
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return 0;
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POINT pt;
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::GetCursorPos(&pt);
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if (!PtInButton(pt)) // The end of hovering?
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{
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m_bHovering = FALSE;
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KillTimer(SHOW_DESKTOP_TIMER_ID);
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InvalidateRect(NULL, TRUE);
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::SendMessageW(::GetParent(m_hWnd), WM_NCPAINT, 0, 0);
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}
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return 0;
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}
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LRESULT OnDestroy(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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{
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if (m_hTheme)
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{
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CloseThemeData(m_hTheme);
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m_hTheme = NULL;
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}
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return 0;
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}
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BEGIN_MSG_MAP(CTrayShowDesktopButton)
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MESSAGE_HANDLER(WM_LBUTTONDOWN, OnLButtonDown)
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MESSAGE_HANDLER(WM_SETTINGCHANGE, OnSettingChanged)
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MESSAGE_HANDLER(WM_THEMECHANGED, OnSettingChanged)
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MESSAGE_HANDLER(WM_PAINT, OnPaint)
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MESSAGE_HANDLER(WM_TIMER, OnTimer)
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MESSAGE_HANDLER(WM_MOUSEMOVE, OnMouseMove)
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MESSAGE_HANDLER(WM_DESTROY, OnDestroy)
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MESSAGE_HANDLER(TSDB_CLICK, OnClick)
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END_MSG_MAP()
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};
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VOID CTrayShowDesktopButton::OnDraw(HDC hdc, LPRECT prc)
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{
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if (m_hTheme)
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{
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if (m_bHovering) // Draw a hot button
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{
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HTHEME hButtonTheme = ::OpenThemeData(m_hWnd, L"Button");
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::DrawThemeBackground(hButtonTheme, hdc, BP_PUSHBUTTON, PBS_NORMAL, prc, prc);
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::CloseThemeData(hButtonTheme);
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}
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else // Draw a taskbar background
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{
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::DrawThemeBackground(m_hTheme, hdc, TBP_BACKGROUNDTOP, 0, prc, prc);
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}
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}
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else
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{
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RECT rc = *prc;
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if (m_bHovering) // Draw a hot button
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{
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::DrawFrameControl(hdc, &rc, DFC_BUTTON, DFCS_BUTTONPUSH | DFCS_ADJUSTRECT);
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HBRUSH hbrHot = ::CreateSolidBrush(RGB(255, 255, 191));
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::FillRect(hdc, &rc, hbrHot);
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::DeleteObject(hbrHot);
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}
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else // Draw a flattish button
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{
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::DrawFrameControl(hdc, &rc, DFC_BUTTON, DFCS_BUTTONPUSH);
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::InflateRect(&rc, -1, -1);
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::FillRect(hdc, &rc, ::GetSysColorBrush(COLOR_3DFACE));
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}
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}
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}
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class CTrayWindow :
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public CComCoClass<CTrayWindow>,
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public CComObjectRootEx<CComMultiThreadModelNoCS>,
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@ -274,6 +468,7 @@ class CTrayWindow :
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public IContextMenu
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{
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CStartButton m_StartButton;
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CTrayShowDesktopButton m_ShowDesktopButton;
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CComPtr<IMenuBand> m_StartMenuBand;
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CComPtr<IMenuPopup> m_StartMenuPopup;
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@ -327,6 +522,7 @@ public:
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public:
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CTrayWindow() :
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m_StartButton(),
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m_ShowDesktopButton(),
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m_Theme(NULL),
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m_Font(NULL),
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m_DesktopWnd(NULL),
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@ -1617,7 +1813,7 @@ ChangePos:
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/* We're about to resize/move the start button, the rebar control and
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the tray notification control */
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dwp = BeginDeferWindowPos(3);
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dwp = BeginDeferWindowPos(4);
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if (dwp == NULL)
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{
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ERR("BeginDeferWindowPos failed. lastErr=%d\n", GetLastError());
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@ -1655,6 +1851,35 @@ ChangePos:
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}
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}
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if (m_ShowDesktopButton.m_hWnd)
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{
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// Get rectangle from rcClient
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RECT rc = rcClient;
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INT cxyShowDesktop = m_ShowDesktopButton.WidthOrHeight();
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if (Horizontal)
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{
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rc.left = rc.right - cxyShowDesktop;
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rc.right += 5; // excessive
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}
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else
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{
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rc.top = rc.bottom - cxyShowDesktop;
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rc.bottom += 5; // excessive
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}
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/* Resize and reposition the button */
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dwp = m_ShowDesktopButton.DeferWindowPos(dwp, NULL,
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rc.left, rc.top,
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rc.right - rc.left, rc.bottom - rc.top,
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SWP_NOZORDER | SWP_NOACTIVATE);
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// Adjust rcClient
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if (Horizontal)
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rcClient.right -= cxyShowDesktop + ::GetSystemMetrics(SM_CXEDGE);
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else
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rcClient.bottom -= cxyShowDesktop + ::GetSystemMetrics(SM_CYEDGE);
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}
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/* Determine the size that the tray notification window needs */
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if (Horizontal)
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{
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@ -2209,6 +2434,15 @@ ChangePos:
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return m_ContextMenu->GetCommandString(idCmd, uType, pwReserved, pszName, cchMax);
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}
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BOOL IsShowDesktopButtonNeeded() // Read the registry value
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{
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return SHRegGetBoolUSValueW(
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L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Advanced",
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L"TaskbarSd",
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FALSE,
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TRUE);
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}
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/**********************************************************
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* ##### message handling #####
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*/
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@ -2224,6 +2458,10 @@ ChangePos:
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/* Create the Start button */
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m_StartButton.Create(m_hWnd);
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/* Create the 'Show Desktop' button if necessary */
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if (IsShowDesktopButtonNeeded())
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m_ShowDesktopButton.DoCreate(m_hWnd);
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/* Load the saved tray window settings */
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RegLoadSettings();
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@ -2364,19 +2602,34 @@ ChangePos:
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return FALSE;
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}
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// We have to draw non-client area because the 'Show Desktop' button is beyond client area.
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void DrawShowDesktopButton()
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{
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// Get the rectangle in window coordinates
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RECT rcButton, rcWnd;
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GetWindowRect(&rcWnd);
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m_ShowDesktopButton.GetWindowRect(&rcButton);
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::OffsetRect(&rcButton, -rcWnd.left, -rcWnd.top);
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HDC hdc = GetDCEx(NULL, DCX_WINDOW | DCX_CACHE | DCX_NORESETATTRS);
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m_ShowDesktopButton.OnDraw(hdc, &rcButton); // Draw the button
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ReleaseDC(hdc);
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}
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LRESULT OnNcPaint(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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{
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if (!m_Theme)
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{
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bHandled = FALSE;
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return 0;
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}
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else if (g_TaskbarSettings.bLock)
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DefWindowProc(uMsg, wParam, lParam);
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bHandled = TRUE;
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if (!m_Theme || g_TaskbarSettings.bLock)
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{
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DrawShowDesktopButton(); // We have to draw non-client area
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return 0;
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}
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return DrawSizerWithTheme((HRGN) wParam);
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DrawSizerWithTheme((HRGN) wParam);
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DrawShowDesktopButton(); // We have to draw non-client area
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return 0;
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}
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LRESULT OnCtlColorBtn(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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@ -2601,11 +2854,15 @@ ChangePos:
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POINT pt = {GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)};
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WINDOWINFO wi = {sizeof(WINDOWINFO)};
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RECT rcStartBtn;
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bHandled = FALSE;
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if (CheckShowDesktopButtonClick(lParam, bHandled))
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return TRUE;
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RECT rcStartBtn;
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m_StartButton.GetWindowRect(&rcStartBtn);
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GetWindowInfo(m_hWnd, &wi);
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switch (m_Position)
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case ABE_BOTTOM:
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{
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if (pt.x > rcStartBtn.right || pt.y < rcStartBtn.top)
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{
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return 0;
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}
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if (rcStartBtn.bottom + (int)wi.cyWindowBorders * 2 + 1 < wi.rcWindow.bottom &&
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pt.y > rcStartBtn.bottom)
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@ -2764,8 +3019,24 @@ HandleTrayContextMenu:
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return Ret;
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}
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BOOL CheckShowDesktopButtonClick(LPARAM lParam, BOOL& bHandled)
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{
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POINT pt = {GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)};
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if (m_ShowDesktopButton.PtInButton(pt)) // Did you click the button?
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{
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m_ShowDesktopButton.Click();
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bHandled = TRUE;
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return TRUE;
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}
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return FALSE;
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}
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LRESULT OnNcLButtonDblClick(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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{
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if (CheckShowDesktopButtonClick(lParam, bHandled))
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return TRUE;
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/* Let the clock handle the double click */
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::SendMessageW(m_TrayNotify, uMsg, wParam, lParam);
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@ -2931,6 +3202,11 @@ HandleTrayContextMenu:
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LRESULT OnMouseMove(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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{
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POINT pt;
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::GetCursorPos(&pt);
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if (m_ShowDesktopButton.PtInButton(pt))
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m_ShowDesktopButton.StartHovering();
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if (g_TaskbarSettings.sr.AutoHide)
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{
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SetTimer(TIMER_ID_MOUSETRACK, MOUSETRACK_INTERVAL, NULL);
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@ -2954,6 +3230,14 @@ HandleTrayContextMenu:
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return TRUE;
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}
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LRESULT OnNcActivate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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{
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DefWindowProc(uMsg, wParam, lParam);
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DrawShowDesktopButton(); // We have to draw non-client area
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bHandled = TRUE;
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return 0;
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}
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LRESULT OnNcCalcSize(INT code, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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{
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RECT *rc = NULL;
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@ -3124,6 +3408,7 @@ HandleTrayContextMenu:
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MESSAGE_HANDLER(WM_DISPLAYCHANGE, OnDisplayChange)
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MESSAGE_HANDLER(WM_COPYDATA, OnCopyData)
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MESSAGE_HANDLER(WM_NCPAINT, OnNcPaint)
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MESSAGE_HANDLER(WM_NCACTIVATE, OnNcActivate)
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MESSAGE_HANDLER(WM_CTLCOLORBTN, OnCtlColorBtn)
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MESSAGE_HANDLER(WM_MOVING, OnMoving)
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MESSAGE_HANDLER(WM_SIZING, OnSizing)
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