132 lines
4.2 KiB
C
132 lines
4.2 KiB
C
// 26 april 2015
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#include "uipriv_windows.h"
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// This contains code used by all OS controls that contain other controls. It also contains the container drawing code.
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static HBRUSH parentBrush = NULL;
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static HWND realParent(HWND hwnd)
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{
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HWND parent;
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int class;
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parent = hwnd;
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for (;;) {
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parent = GetAncestor(parent, GA_PARENT);
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// skip groupboxes; they're (supposed to be) transparent
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// skip uiContainers; they don't draw anything
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class = windowClassOf(parent, L"button", containerClass, NULL);
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if (class != 0 && class != 1)
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break;
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}
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return parent;
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}
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struct parentDraw {
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HDC cdc;
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HBITMAP bitmap;
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HBITMAP prevbitmap;
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};
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static void parentDraw(HDC dc, HWND parent, struct parentDraw *pd)
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{
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RECT r;
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if (GetClientRect(parent, &r) == 0)
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logLastError("error getting parent's client rect in parentDraw()");
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pd->cdc = CreateCompatibleDC(dc);
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if (pd->cdc == NULL)
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logLastError("error creating compatible DC in parentDraw()");
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pd->bitmap = CreateCompatibleBitmap(dc, r.right - r.left, r.bottom - r.top);
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if (pd->bitmap == NULL)
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logLastError("error creating compatible bitmap in parentDraw()");
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pd->prevbitmap = SelectObject(pd->cdc, pd->bitmap);
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if (pd->prevbitmap == NULL)
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logLastError("error selecting bitmap into compatible DC in parentDraw()");
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SendMessageW(parent, WM_PRINTCLIENT, (WPARAM) (pd->cdc), PRF_CLIENT);
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}
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static void endParentDraw(struct parentDraw *pd)
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{
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if (SelectObject(pd->cdc, pd->prevbitmap) != pd->bitmap)
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logLastError("error selecting previous bitmap back into compatible DC in endParentDraw()");
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if (DeleteObject(pd->bitmap) == 0)
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logLastError("error deleting compatible bitmap in endParentDraw()");
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if (DeleteDC(pd->cdc) == 0)
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logLastError("error deleting compatible DC in endParentDraw()");
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}
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// see http://www.codeproject.com/Articles/5978/Correctly-drawn-themed-dialogs-in-WinXP
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static HBRUSH getControlBackgroundBrush(HWND hwnd, HDC dc)
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{
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HWND parent;
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RECT hwndScreenRect;
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struct parentDraw pd;
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HBRUSH brush;
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parent = realParent(hwnd);
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parentDraw(dc, parent, &pd);
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brush = CreatePatternBrush(pd.bitmap);
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if (brush == NULL)
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logLastError("error creating pattern brush in getControlBackgroundBrush()");
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endParentDraw(&pd);
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// now figure out where the control is relative to the parent so we can align the brush properly
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if (GetWindowRect(hwnd, &hwndScreenRect) == 0)
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logLastError("error getting control window rect in getControlBackgroundBrush()");
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// this will be in screen coordinates; convert to parent coordinates
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mapWindowRect(NULL, parent, &hwndScreenRect);
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if (SetBrushOrgEx(dc, -hwndScreenRect.left, -hwndScreenRect.top, NULL) == 0)
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logLastError("error setting brush origin in getControlBackgroundBrush()");
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return brush;
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}
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// TODO
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static void paintContainerBackground(HWND hwnd, HDC dc, RECT *paintRect)
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{
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HWND parent;
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RECT paintRectParent;
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struct parentDraw pd;
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parent = realParent(hwnd);
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parentDraw(dc, parent, &pd);
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paintRectParent = *paintRect;
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mapWindowRect(hwnd, parent, &paintRectParent);
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if (BitBlt(dc, paintRect->left, paintRect->top, paintRect->right - paintRect->left, paintRect->bottom - paintRect->top,
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pd.cdc, paintRectParent.left, paintRectParent.top,
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SRCCOPY) == 0)
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logLastError("error drawing parent background over uiContainer in paintContainerBackground()");
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endParentDraw(&pd);
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}
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// why have this to begin with? http://blogs.msdn.com/b/oldnewthing/archive/2010/03/16/9979112.aspx
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BOOL handleParentMessages(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT *lResult)
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{
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HWND control;
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NMHDR *nm = (NMHDR *) lParam;
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switch (uMsg) {
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case WM_COMMAND:
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return runWM_COMMAND(wParam, lParam, lResult);
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case WM_NOTIFY:
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return runWM_NOTIFY(wParam, lParam, lResult);
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case WM_HSCROLL:
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return runWM_HSCROLL(wParam, lParam, lResult);
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case WM_CTLCOLORSTATIC:
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case WM_CTLCOLORBTN:
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if (parentBrush != NULL)
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if (DeleteObject(parentBrush) == 0)
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logLastError("error deleting old background brush in containerWndProc()");
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if (SetBkMode((HDC) wParam, TRANSPARENT) == 0)
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logLastError("error setting transparent background mode to controls in containerWndProc()");
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parentBrush = getControlBackgroundBrush((HWND) lParam, (HDC) wParam);
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*lResult = (LRESULT) parentBrush;
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return TRUE;
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}
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return FALSE;
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}
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