New checkbox plan: because DrawThemeBackground() /might/ do AlphaBlend(), we'll just draw checkboxes on the fly.
This commit is contained in:
Pietro Gagliardi
parent
07c599ad1b
commit
d7cf4fa7c5
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@ -1,6 +1,11 @@
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// 16 august 2014
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// TODO instead of caching checkbox images, draw them on the fly, because they could be transparent
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enum {
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checkboxStateChecked = 1 << 0,
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checkboxStateHot = 1 << 1,
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checkboxStatePushed = 1 << 2,
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checkboxnStates = 1 << 3,
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};
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// TODO actually make this
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#define panichresult(a, b) panic(a)
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@ -19,13 +24,13 @@ static UINT dfcState(int cbstate)
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return ret;
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}
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static void dfcImage(HDC dc, RECT *r, int cbState, HTHEME theme)
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static void drawFrameControlCheckbox(HDC dc, RECT *r, int cbState)
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{
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if (DrawFrameControl(dc, r, DFC_BUTTON, dfcState(cbState)) == 0)
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panic("error drawing Table checkbox image with DrawFrameControl()");
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}
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static void dfcSize(HDC dc, int *width, int *height, HTHEME theme)
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static void getFrameControlCheckboxSize(HDC dc, int *width, int *height, HTHEME theme)
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{
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// there's no real metric around
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// let's use SM_CX/YSMICON and hope for the best
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@ -55,7 +60,7 @@ static SIZE getStateSize(HDC dc, int cbState, HTHEME theme)
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return s;
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}
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static void themeImage(HDC dc, RECT *r, int cbState, HTHEME theme)
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static void drawThemeCheckbox(HDC dc, RECT *r, int cbState, HTHEME theme)
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{
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HRESULT res;
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@ -64,7 +69,7 @@ static void themeImage(HDC dc, RECT *r, int cbState, HTHEME theme)
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panichresult("error drawing Table checkbox image from theme", res);
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}
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static void themeSize(HDC dc, int *width, int *height, HTHEME theme)
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static void getThemeCheckboxSize(HDC dc, int *width, int *height, HTHEME theme)
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{
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SIZE size;
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int cbState;
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@ -82,87 +87,48 @@ static void themeSize(HDC dc, int *width, int *height, HTHEME theme)
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*height = (int) size.cy;
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}
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static void makeCheckboxImage(struct table *t, HDC dc, int cbState, void (*drawfunc)(HDC, RECT *, int, HTHEME))
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static void drawCheckbox(struct table *t, HDC dc, int x, int y, int cbState)
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{
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BITMAPINFO bi;
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VOID *ppvBits;
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HBITMAP bitmap;
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RECT r;
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HDC drawDC;
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HBITMAP prevbitmap;
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r.left = 0;
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r.top = 0;
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r.right = t->checkboxWidth;
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r.bottom = t->checkboxHeight;
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ZeroMemory(&bi, sizeof (BITMAPINFO));
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bi.bmiHeader.biSize = sizeof (BITMAPINFOHEADER);
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bi.bmiHeader.biWidth = (LONG) (t->checkboxWidth);
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bi.bmiHeader.biHeight = -((LONG) (t->checkboxHeight)); // negative height to force top-down drawing;
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bi.bmiHeader.biPlanes = 1;
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bi.bmiHeader.biBitCount = 32;
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bi.bmiHeader.biCompression = BI_RGB;
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bi.bmiHeader.biSizeImage = (DWORD) (t->checkboxWidth * t->checkboxHeight * 4);
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bitmap = CreateDIBSection(NULL, &bi, DIB_RGB_COLORS, &ppvBits, 0, 0);
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if (bitmap == NULL)
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panic("error creating HBITMAP for Table checkbox image");
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drawDC = CreateCompatibleDC(dc);
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if (drawDC == NULL)
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panic("error getting DC for drawing Table checkbox image");
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prevbitmap = SelectObject(drawDC, bitmap);
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if (prevbitmap == NULL)
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panic("error selecting Table checkbox image list bitmap into DC");
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(*drawfunc)(drawDC, &r, cbState, t->theme);
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if (SelectObject(drawDC, prevbitmap) != bitmap)
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panic("error selecting previous bitmap into Table checkbox image's DC");
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if (DeleteDC(drawDC) == 0)
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panic("error deleting Table checkbox image's DC");
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t->checkboxImages[cbState] = bitmap;
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r.left = x;
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r.top = y;
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r.right = r.bottom + t->checkboxWidth;
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r.bottom = r.top + t->checkboxHeight;
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if (t->theme != NULL) {
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drawThemeCheckbox(dc, &r, cbState, t->theme);
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return;
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}
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drawFrameControlCheckbox(dc, &r, cbState);
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}
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static void getCheckboxImages(struct table *t, void (*sizefunc)(HDC, int *, int *, HTHEME), void (*drawfunc)(HDC, RECT *, int, HTHEME))
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{
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int cbState;
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HDC dc;
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dc = GetDC(t->hwnd);
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if (dc == NULL)
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panic("error getting DC for making Table checkbox images");
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(*sizefunc)(dc, &(t->checkboxWidth), &(t->checkboxHeight), t->theme);
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for (cbState = 0; cbState < checkboxnStates; cbState++)
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makeCheckboxImage(t, dc, cbState, drawfunc);
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if (ReleaseDC(t->hwnd, dc) == 0)
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panic("error deleting Table DC for making checkbox images");
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}
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static void makeCheckboxImages(struct table *t)
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static void freeCheckboxThemeData(struct table *t)
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{
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if (t->theme != NULL) {
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HRESULT res;
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res = CloseThemeData(t->theme);
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if (res != S_OK)
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panichresult("error closing theme", res);
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panichresult("error closing Table checkbox theme", res);
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t->theme = NULL;
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}
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}
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static void loadCheckboxThemeData(struct table *t)
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{
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HDC dc;
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freeCheckboxThemeData(t);
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dc = GetDC(t->hwnd);
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if (dc == NULL)
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panic("error getting Table DC for loading checkbox theme data");
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// ignore error; if it can't be done, we can fall back to DrawFrameControl()
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if (t->theme == NULL) // try to open the theme
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t->theme = OpenThemeData(t->hwnd, L"button");
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if (t->theme != NULL) { // use the theme
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getCheckboxImages(t, themeSize, themeImage);
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return;
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}
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// couldn't open; fall back
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getCheckboxImages(t, dfcSize, dfcImage);
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}
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static void freeCheckboxImages(struct table *t)
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{
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int cbState;
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for (cbState = 0; cbState < checkboxnStates; cbState++)
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if (DeleteObject(t->checkboxImages[cbState]) == 0)
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panic("error freeing Table checkbox image");
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if (t->theme != NULL) // use the theme
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getThemeCheckboxSize(dc, &(t->checkboxWidth), &(t->checkboxHeight), t->theme);
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else // couldn't open; fall back
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getFrameControlCheckboxSize(dc, &(t->checkboxWidth), &(t->checkboxHeight), t->theme);
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if (ReleaseDC(t->hwnd, dc) == 0)
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panic("error releasing Table DC for loading checkbox theme data");
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}
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@ -50,13 +50,6 @@ static void (*tablePanic)(const char *, DWORD) = NULL;
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#define panic(...) (*tablePanic)(__VA_ARGS__, GetLastError())
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#define abort $$$$ // prevent accidental use of abort()
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enum {
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checkboxStateChecked = 1 << 0,
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checkboxStateHot = 1 << 1,
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checkboxStatePushed = 1 << 2,
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checkboxnStates = 1 << 3,
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};
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struct table {
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HWND hwnd;
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HWND header;
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@ -75,7 +68,6 @@ struct table {
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intptr_t selectedRow;
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intptr_t selectedColumn;
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HTHEME theme;
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HBITMAP checkboxImages[checkboxnStates];
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int checkboxWidth;
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int checkboxHeight;
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};
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@ -130,7 +122,7 @@ static LRESULT CALLBACK tableWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM
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makeHeader(t, cs->hInstance);
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t->selectedRow = -1;
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t->selectedColumn = -1;
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makeCheckboxImages(t);
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loadCheckboxThemeData(t);
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initDummyTableStuff(t);
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SetWindowLongPtrW(hwnd, GWLP_USERDATA, (LONG_PTR) t);
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}
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@ -141,7 +133,7 @@ initDummyTableStuff(t);
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printf("destroy\n");
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// TODO free appropriate (after figuring this part out) components of t
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// TODO send EVENT_OBJECT_DESTROY events to accessibility listeners (when appropriate); see the note on proxy objects as well
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freeCheckboxImages(t);
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freeCheckboxThemeData(t);
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destroyHeader(t);
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tableFree(t, "error allocating internal Table data structure");
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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