Moved around checkboxes.h pendig plans for that code.

1 files changed, 134 insertions, 0 deletions

diff --git a/wintable/new/checkboxes.h b/wintable/new/checkboxes.h
new file mode 100644
index 0000000..87c6c9a
--- /dev/null
+++ b/wintable/new/checkboxes.h
@@ -0,0 +1,134 @@
+// 16 august 2014
+
+enum {
+        checkboxStateChecked = 1 << 0,
+        checkboxStateHot = 1 << 1,
+        checkboxStatePushed = 1 << 2,
+        checkboxnStates = 1 << 3,
+};
+
+// TODO actually make this
+#define panichresult(a, b) panic(a)
+
+static UINT dfcState(int cbstate)
+{
+	UINT ret;
+
+	ret = DFCS_BUTTONCHECK;
+	if ((cbstate & checkboxStateChecked) != 0)
+		ret |= DFCS_CHECKED;
+	if ((cbstate & checkboxStateHot) != 0)
+		ret |= DFCS_HOT;
+	if ((cbstate & checkboxStatePushed) != 0)
+		ret |= DFCS_PUSHED;
+	return ret;
+}
+
+static void drawFrameControlCheckbox(HDC dc, RECT *r, int cbState)
+{
+	if (DrawFrameControl(dc, r, DFC_BUTTON, dfcState(cbState)) == 0)
+		panic("error drawing Table checkbox image with DrawFrameControl()");
+}
+
+static void getFrameControlCheckboxSize(HDC dc, int *width, int *height, HTHEME theme)
+{
+	// there's no real metric around
+	// let's use SM_CX/YSMICON and hope for the best
+	*width = GetSystemMetrics(SM_CXSMICON);
+	*height = GetSystemMetrics(SM_CYSMICON);
+}
+
+static int themestates[checkboxnStates] = {
+	CBS_UNCHECKEDNORMAL,			// 0
+	CBS_CHECKEDNORMAL,				// checked
+	CBS_UNCHECKEDHOT,				// hot
+	CBS_CHECKEDHOT,					// checked | hot
+	CBS_UNCHECKEDPRESSED,			// pushed
+	CBS_CHECKEDPRESSED,				// checked | pushed
+	CBS_UNCHECKEDPRESSED,			// hot | pushed
+	CBS_CHECKEDPRESSED,				// checked | hot | pushed
+};
+
+static SIZE getStateSize(HDC dc, int cbState, HTHEME theme)
+{
+	SIZE s;
+	HRESULT res;
+
+	res = GetThemePartSize(theme, dc, BP_CHECKBOX, themestates[cbState], NULL, TS_DRAW, &s);
+	if (res != S_OK)
+		panichresult("error getting theme part size for Table checkboxes", res);
+	return s;
+}
+
+static void drawThemeCheckbox(HDC dc, RECT *r, int cbState, HTHEME theme)
+{
+	HRESULT res;
+
+	res = DrawThemeBackground(theme, dc, BP_CHECKBOX, themestates[cbState], r, NULL);
+	if (res != S_OK)
+		panichresult("error drawing Table checkbox image from theme", res);
+}
+
+static void getThemeCheckboxSize(HDC dc, int *width, int *height, HTHEME theme)
+{
+	SIZE size;
+	int cbState;
+
+	size = getStateSize(dc, 0, theme);
+	for (cbState = 1; cbState < checkboxnStates; cbState++) {
+		SIZE against;
+
+		against = getStateSize(dc, cbState, theme);
+		if (size.cx != against.cx || size.cy != against.cy)
+			// TODO make this use a no-information (or two ints) panic()
+			panic("size mismatch in Table checkbox states");
+	}
+	*width = (int) size.cx;
+	*height = (int) size.cy;
+}
+
+static void drawCheckbox(struct table *t, HDC dc, int x, int y, int cbState)
+{
+	RECT r;
+
+	r.left = x;
+	r.top = y;
+	r.right = r.bottom + t->checkboxWidth;
+	r.bottom = r.top + t->checkboxHeight;
+	if (t->theme != NULL) {
+		drawThemeCheckbox(dc, &r, cbState, t->theme);
+		return;
+	}
+	drawFrameControlCheckbox(dc, &r, cbState);
+}
+
+static void freeCheckboxThemeData(struct table *t)
+{
+	if (t->theme != NULL) {
+		HRESULT res;
+
+		res = CloseThemeData(t->theme);
+		if (res != S_OK)
+			panichresult("error closing Table checkbox theme", res);
+		t->theme = NULL;
+	}
+}
+
+static void loadCheckboxThemeData(struct table *t)
+{
+	HDC dc;
+
+	freeCheckboxThemeData(t);
+	dc = GetDC(t->hwnd);
+	if (dc == NULL)
+		panic("error getting Table DC for loading checkbox theme data");
+	// ignore error; if it can't be done, we can fall back to DrawFrameControl()
+	if (t->theme == NULL)		// try to open the theme
+		t->theme = OpenThemeData(t->hwnd, L"button");
+	if (t->theme != NULL)		// use the theme
+		getThemeCheckboxSize(dc, &(t->checkboxWidth), &(t->checkboxHeight), t->theme);
+	else						// couldn't open; fall back
+		getFrameControlCheckboxSize(dc, &(t->checkboxWidth), &(t->checkboxHeight), t->theme);
+	if (ReleaseDC(t->hwnd, dc) == 0)
+		panic("error releasing Table DC for loading checkbox theme data");
+}