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[SHIMGVW] Enable scrolling (#6172)

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- Add m_xScrollOffset and m_yScrollOffset to
  PREVIEW_DATA structure.
- Add ZoomWnd_UpdateScroll helper function.
- Handle WM_HSCROLL and WM_VSCROLL messages.
- Enable mouse wheel scrolling.
CORE-19358
This commit is contained in:
Katayama Hirofumi MZ 2023-12-16 19:45:37 +09:00 committed by GitHub
parent 69fb160a48
commit e62d12b140
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 192 additions and 23 deletions
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214
dll/win32/shimgvw/shimgvw.c
View file

@ -101,6 +101,8 @@ typedef struct tagPREVIEW_DATA
HWND m_hwndToolBar;
INT m_nZoomPercents;
ANIME m_Anime; /* Animation */
INT m_xScrollOffset;
INT m_yScrollOffset;
} PREVIEW_DATA, *PPREVIEW_DATA;
static inline PPREVIEW_DATA
@ -125,6 +127,78 @@ Preview_RestartTimer(HWND hwnd)
}
}
static VOID
ZoomWnd_UpdateScroll(PPREVIEW_DATA pData, HWND hwnd, BOOL bResetPos)
{
RECT rcClient;
UINT ImageWidth, ImageHeight, ZoomedWidth, ZoomedHeight;
SCROLLINFO si;
BOOL bShowHorz, bShowVert;
if (bResetPos)
pData->m_xScrollOffset = pData->m_yScrollOffset = 0;
if (!g_pImage)
{
ShowScrollBar(hwnd, SB_BOTH, FALSE);
InvalidateRect(hwnd, NULL, TRUE);
return;
}
GdipGetImageWidth(g_pImage, &ImageWidth);
GdipGetImageHeight(g_pImage, &ImageHeight);
ZoomedWidth = (ImageWidth * pData->m_nZoomPercents) / 100;
ZoomedHeight = (ImageHeight * pData->m_nZoomPercents) / 100;
GetClientRect(hwnd, &rcClient);
bShowHorz = (rcClient.right < ZoomedWidth);
bShowVert = (rcClient.bottom < ZoomedHeight);
ShowScrollBar(hwnd, SB_HORZ, bShowHorz);
ShowScrollBar(hwnd, SB_VERT, bShowVert);
GetClientRect(hwnd, &rcClient);
ZeroMemory(&si, sizeof(si));
si.cbSize = sizeof(si);
si.fMask = SIF_ALL;
if (bShowHorz)
{
GetScrollInfo(hwnd, SB_HORZ, &si);
si.nPage = rcClient.right;
si.nMin = 0;
si.nMax = ZoomedWidth;
si.nPos = (ZoomedWidth - rcClient.right) / 2 + pData->m_xScrollOffset;
si.nPos = max(min(si.nPos, si.nMax - (INT)si.nPage), si.nMin);
SetScrollInfo(hwnd, SB_HORZ, &si, TRUE);
pData->m_xScrollOffset = si.nPos - (ZoomedWidth - rcClient.right) / 2;
}
else
{
pData->m_xScrollOffset = 0;
}
if (bShowVert)
{
GetScrollInfo(hwnd, SB_VERT, &si);
si.nPage = rcClient.bottom;
si.nMin = 0;
si.nMax = ZoomedHeight;
si.nPos = (ZoomedHeight - rcClient.bottom) / 2 + pData->m_yScrollOffset;
si.nPos = max(min(si.nPos, si.nMax - (INT)si.nPage), si.nMin);
SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
pData->m_yScrollOffset = si.nPos - (ZoomedHeight - rcClient.bottom) / 2;
}
else
{
pData->m_yScrollOffset = 0;
}
InvalidateRect(hwnd, NULL, TRUE);
}
static VOID
Preview_UpdateZoom(PPREVIEW_DATA pData, UINT NewZoom, BOOL bEnableBestFit, BOOL bEnableRealSize)
{
@ -148,6 +222,9 @@ Preview_UpdateZoom(PPREVIEW_DATA pData, UINT NewZoom, BOOL bEnableBestFit, BOOL
/* Restart timer if necessary */
Preview_RestartTimer(pData->m_hwnd);
/* Update scroll info */
ZoomWnd_UpdateScroll(pData, pData->m_hwndZoom, FALSE);
}
static VOID
@ -399,11 +476,15 @@ Preview_UpdateUI(PPREVIEW_DATA pData)
BOOL bEnable = (g_pImage != NULL);
PostMessageW(pData->m_hwndToolBar, TB_ENABLEBUTTON, IDC_SAVEAS, bEnable);
PostMessageW(pData->m_hwndToolBar, TB_ENABLEBUTTON, IDC_PRINT, bEnable);
}
static VOID
Preview_UpdateImage(PPREVIEW_DATA pData)
{
if (!Preview_IsMainWnd(pData->m_hwnd))
Preview_ResetZoom(pData);
InvalidateRect(pData->m_hwndZoom, NULL, FALSE);
ZoomWnd_UpdateScroll(pData, pData->m_hwndZoom, TRUE);
}
static SHIMGVW_FILENODE*
@ -651,7 +732,9 @@ ZoomWnd_OnDraw(
rect.top = (rcClient.bottom - ZoomedHeight) / 2;
rect.right = rect.left + ZoomedWidth;
rect.bottom = rect.top + ZoomedHeight;
OffsetRect(&rect, -prcPaint->left, -prcPaint->top);
OffsetRect(&rect,
-prcPaint->left - pData->m_xScrollOffset,
-prcPaint->top - pData->m_yScrollOffset);
InflateRect(&rect, +1, +1); /* Add Rectangle() pen width */
@ -807,6 +890,98 @@ ZoomWnd_OnButtonDown(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
Preview_EndSlideShow(hParent);
}
static VOID
ZoomWnd_OnHVScroll(PPREVIEW_DATA pData, HWND hwnd, WPARAM wParam, BOOL bVertical)
{
UINT ImageWidth, ImageHeight, ZoomedWidth, ZoomedHeight;
RECT rcClient;
UINT nBar = (bVertical ? SB_VERT : SB_HORZ);
SCROLLINFO si = { sizeof(si), SIF_ALL };
GetScrollInfo(hwnd, nBar, &si);
if (!g_pImage)
return;
if (bVertical)
{
if (!(GetWindowLongPtrW(hwnd, GWL_STYLE) & WS_VSCROLL))
return;
}
else
{
if (!(GetWindowLongPtrW(hwnd, GWL_STYLE) & WS_HSCROLL))
return;
}
switch (LOWORD(wParam))
{
case SB_THUMBTRACK:
case SB_THUMBPOSITION:
si.nPos = (SHORT)HIWORD(wParam);
break;
case SB_LINELEFT:
si.nPos -= 48;
break;
case SB_LINERIGHT:
si.nPos += 48;
break;
case SB_PAGELEFT:
si.nPos -= si.nPage;
break;
case SB_PAGERIGHT:
si.nPos += si.nPage;
break;
}
si.fMask = SIF_POS;
SetScrollInfo(hwnd, nBar, &si, TRUE);
GetScrollInfo(hwnd, nBar, &si);
GetClientRect(hwnd, &rcClient);
if (bVertical)
{
GdipGetImageHeight(g_pImage, &ImageHeight);
ZoomedHeight = (ImageHeight * pData->m_nZoomPercents) / 100;
pData->m_yScrollOffset = si.nPos - (ZoomedHeight - rcClient.bottom) / 2;
}
else
{
GdipGetImageWidth(g_pImage, &ImageWidth);
ZoomedWidth = (ImageWidth * pData->m_nZoomPercents) / 100;
pData->m_xScrollOffset = si.nPos - (ZoomedWidth - rcClient.right) / 2;
}
InvalidateRect(hwnd, NULL, TRUE);
}
static VOID
ZoomWnd_OnMouseWheel(HWND hwnd, INT x, INT y, INT zDelta, UINT fwKeys)
{
PPREVIEW_DATA pData = Preview_GetData(hwnd);
if (zDelta == 0)
return;
if (GetKeyState(VK_CONTROL) < 0)
{
Preview_ZoomInOrOut(pData, zDelta > 0);
}
else if (GetKeyState(VK_SHIFT) < 0)
{
if (zDelta > 0)
SendMessageW(hwnd, WM_HSCROLL, SB_LINELEFT, 0);
else
SendMessageW(hwnd, WM_HSCROLL, SB_LINERIGHT, 0);
}
else
{
if (zDelta > 0)
SendMessageW(hwnd, WM_VSCROLL, SB_LINEUP, 0);
else
SendMessageW(hwnd, WM_VSCROLL, SB_LINEDOWN, 0);
}
}
LRESULT CALLBACK
ZoomWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
@ -825,6 +1000,16 @@ ZoomWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
ZoomWnd_OnPaint(pData, hwnd);
break;
}
case WM_MOUSEWHEEL:
{
ZoomWnd_OnMouseWheel(hwnd, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam),
(SHORT)HIWORD(wParam), (UINT)LOWORD(wParam));
break;
}
case WM_HSCROLL:
case WM_VSCROLL:
ZoomWnd_OnHVScroll(pData, hwnd, wParam, uMsg == WM_VSCROLL);
break;
case WM_TIMER:
{
if (Anime_OnTimer(&pData->m_Anime, wParam))
@ -893,23 +1078,13 @@ Preview_OnCreate(HWND hwnd, LPCREATESTRUCT pCS)
g_pCurrentFile = pBuildFileList(szFile);
Preview_pLoadImageFromNode(pData, g_pCurrentFile);
Preview_UpdateImage(pData);
Preview_UpdateUI(pData);
}
return TRUE;
}
static VOID
Preview_OnMouseWheel(HWND hwnd, INT x, INT y, INT zDelta, UINT fwKeys)
{
PPREVIEW_DATA pData = Preview_GetData(hwnd);
if (zDelta != 0)
{
if (GetKeyState(VK_CONTROL) < 0)
Preview_ZoomInOrOut(pData, zDelta > 0);
}
}
static VOID
Preview_OnMoveSize(HWND hwnd)
{
@ -1075,6 +1250,7 @@ Preview_GoNextPic(PPREVIEW_DATA pData, BOOL bNext)
else
g_pCurrentFile = g_pCurrentFile->Prev;
Preview_pLoadImageFromNode(pData, g_pCurrentFile);
Preview_UpdateImage(pData);
Preview_UpdateUI(pData);
}
}
@ -1140,7 +1316,7 @@ Preview_OnCommand(HWND hwnd, UINT nCommandID)
if (g_pImage)
{
GdipImageRotateFlip(g_pImage, Rotate270FlipNone);
Preview_UpdateUI(pData);
Preview_UpdateImage(pData);
}
break;
@ -1148,18 +1324,18 @@ Preview_OnCommand(HWND hwnd, UINT nCommandID)
if (g_pImage)
{
GdipImageRotateFlip(g_pImage, Rotate90FlipNone);
Preview_UpdateUI(pData);
Preview_UpdateImage(pData);
}
break;
case IDC_DELETE:
Preview_Delete(pData);
Preview_UpdateImage(pData);
Preview_UpdateUI(pData);
break;
case IDC_MODIFY:
Preview_Edit(hwnd);
Preview_UpdateUI(pData);
break;
default:
@ -1245,12 +1421,6 @@ PreviewWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
Preview_OnCommand(hwnd, LOWORD(wParam));
break;
}
case WM_MOUSEWHEEL:
{
Preview_OnMouseWheel(hwnd, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam),
(SHORT)HIWORD(wParam), (UINT)LOWORD(wParam));
break;
}
case WM_NOTIFY:
{
return Preview_OnNotify(hwnd, (LPNMHDR)lParam);

1
dll/win32/shimgvw/shimgvw.h
View file

@ -24,7 +24,6 @@
#include <shlwapi.h>
#include <strsafe.h>
#define NDEBUG
#include <debug.h>
#include "resource.h"