diff options
| -rw-r--r-- | windowspopover/main.c | 71 |
1 files changed, 45 insertions, 26 deletions
diff --git a/windowspopover/main.c b/windowspopover/main.c index c53422c..4ee7b27 100644 --- a/windowspopover/main.c +++ b/windowspopover/main.c @@ -33,51 +33,69 @@ HWND popover; #define ARROWHEIGHT 8 #define ARROWWIDTH 8 /* should be the same for smooth lines */ +HRGN makePopoverRegion(HDC dc, LONG width, LONG height) +{ + POINT pt; + + BeginPath(dc); + pt.x = 0; + pt.y = ARROWHEIGHT; + MoveToEx(dc, pt.x, pt.y, NULL); + pt.y += height - ARROWHEIGHT; + LineTo(dc, pt.x, pt.y); + pt.x += width; + LineTo(dc, pt.x, pt.y); + pt.y -= height - ARROWHEIGHT; + LineTo(dc, pt.x, pt.y); + pt.x -= (width / 2) - ARROWWIDTH; + LineTo(dc, pt.x, pt.y); + pt.x -= ARROWWIDTH; + pt.y -= ARROWHEIGHT; + LineTo(dc, pt.x, pt.y); + pt.x -= ARROWWIDTH; + pt.y += ARROWHEIGHT; + LineTo(dc, pt.x, pt.y); + pt.x = 0; + LineTo(dc, pt.x, pt.y); + EndPath(dc); + return PathToRegion(dc); +} + LRESULT CALLBACK popoverproc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { PAINTSTRUCT ps; HDC dc; HRGN region; - POINT pt; RECT r; LONG width; LONG height; + WINDOWPOS *wp; switch (uMsg) { case WM_NCPAINT: GetWindowRect(hwnd, &r); width = r.right - r.left; height = r.bottom - r.top; - dc = GetDCEx(hwnd, (HRGN) wParam, DCX_WINDOW | DCX_INTERSECTRGN); + dc = GetWindowDC(hwnd); if (dc == NULL) abort(); - BeginPath(dc); - r.left = 0; r.top = 0; // everything's in device coordinates - pt.x = r.left; - pt.y = r.top + ARROWHEIGHT; - if (MoveToEx(dc, pt.x, pt.y, NULL) == 0) abort(); - pt.y += height - ARROWHEIGHT; - if (LineTo(dc, pt.x, pt.y) == 0) abort(); - pt.x += width; - LineTo(dc, pt.x, pt.y); - pt.y -= height - ARROWHEIGHT; - LineTo(dc, pt.x, pt.y); - pt.x -= (width / 2) - ARROWWIDTH; - LineTo(dc, pt.x, pt.y); - pt.x -= ARROWWIDTH; - pt.y -= ARROWHEIGHT; - LineTo(dc, pt.x, pt.y); - pt.x -= ARROWWIDTH; - pt.y += ARROWHEIGHT; - LineTo(dc, pt.x, pt.y); - pt.x = 0; - LineTo(dc, pt.x, pt.y); - EndPath(dc); SetDCBrushColor(dc, RGB(255, 0, 0)); - region = PathToRegion(dc); + region = makePopoverRegion(dc, width, height); FrameRgn(dc, region, GetStockObject(DC_BRUSH), 1, 1); - SetWindowRgn(hwnd, region, TRUE); + DeleteObject(region); ReleaseDC(hwnd, dc); return 0; + case WM_WINDOWPOSCHANGED: + // this must be here; if it's in WM_NCPAINT weird things happen (see http://stackoverflow.com/questions/26288303/why-is-my-client-rectangle-drawing-behaving-bizarrely-pictures-provided-if-i-t) + wp = (WINDOWPOS *) lParam; + if ((wp->flags & SWP_NOSIZE) == 0) { + dc = GetWindowDC(hwnd); + if (dc == NULL) abort(); + region = makePopoverRegion(dc, wp->cx, wp->cy); + SetWindowRgn(hwnd, region, TRUE); + // don't delete the region; the window manager owns it now + ReleaseDC(hwnd, dc); + } + break; // defer to DefWindowProc() case WM_NCCALCSIZE: { RECT *r = (RECT *) lParam; @@ -99,6 +117,7 @@ LRESULT CALLBACK popoverproc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) dc = BeginPaint(hwnd, &ps); GetClientRect(hwnd, &r); FillRect(dc, &r, GetSysColorBrush(COLOR_ACTIVECAPTION)); + FrameRect(dc, &r, GetStockPen(WHITE_PEN)); EndPaint(hwnd, &ps); return 0; } |