First Commit

libui-ng/windows/fontbutton.cpp

@@ -0,0 +1,128 @@
+// 14 april 2016
+#include "uipriv_windows.hpp"
+#include "attrstr.hpp"
+
+struct uiFontButton {
+	uiWindowsControl c;
+	HWND hwnd;
+	struct fontDialogParams params;
+	BOOL already;
+	void (*onChanged)(uiFontButton *, void *);
+	void *onChangedData;
+};
+
+static void uiFontButtonDestroy(uiControl *c)
+{
+	uiFontButton *b = uiFontButton(c);
+
+	uiWindowsUnregisterWM_COMMANDHandler(b->hwnd);
+	uiprivDestroyFontDialogParams(&(b->params));
+	uiWindowsEnsureDestroyWindow(b->hwnd);
+	uiFreeControl(uiControl(b));
+}
+
+static void updateFontButtonLabel(uiFontButton *b)
+{
+	WCHAR *text;
+
+	text = uiprivFontDialogParamsToString(&(b->params));
+	setWindowText(b->hwnd, text);
+	uiprivFree(text);
+
+	// changing the text might necessitate a change in the button's size
+	uiWindowsControlMinimumSizeChanged(uiWindowsControl(b));
+}
+
+static BOOL onWM_COMMAND(uiControl *c, HWND hwnd, WORD code, LRESULT *lResult)
+{
+	uiFontButton *b = uiFontButton(c);
+	HWND parent;
+
+	if (code != BN_CLICKED)
+		return FALSE;
+
+	parent = parentToplevel(b->hwnd);
+	if (uiprivShowFontDialog(parent, &(b->params))) {
+		updateFontButtonLabel(b);
+		(*(b->onChanged))(b, b->onChangedData);
+	}
+
+	*lResult = 0;
+	return TRUE;
+}
+
+uiWindowsControlAllDefaultsExceptDestroy(uiFontButton)
+
+// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
+#define buttonHeight 14
+
+static void uiFontButtonMinimumSize(uiWindowsControl *c, int *width, int *height)
+{
+	uiFontButton *b = uiFontButton(c);
+	SIZE size;
+	uiWindowsSizing sizing;
+	int y;
+
+	// try the comctl32 version 6 way
+	size.cx = 0;		// explicitly ask for ideal size
+	size.cy = 0;
+	if (SendMessageW(b->hwnd, BCM_GETIDEALSIZE, 0, (LPARAM) (&size)) != FALSE) {
+		*width = size.cx;
+		*height = size.cy;
+		return;
+	}
+
+	// that didn't work; fall back to using Microsoft's metrics
+	// Microsoft says to use a fixed width for all buttons; this isn't good enough
+	// use the text width instead, with some edge padding
+	*width = uiWindowsWindowTextWidth(b->hwnd) + (2 * GetSystemMetrics(SM_CXEDGE));
+	y = buttonHeight;
+	uiWindowsGetSizing(b->hwnd, &sizing);
+	uiWindowsSizingDlgUnitsToPixels(&sizing, NULL, &y);
+	*height = y;
+}
+
+static void defaultOnChanged(uiFontButton *b, void *data)
+{
+	// do nothing
+}
+
+void uiFontButtonFont(uiFontButton *b, uiFontDescriptor *desc)
+{
+	uiprivFontDescriptorFromIDWriteFont(b->params.font, desc);
+	desc->Family = toUTF8(b->params.familyName);
+	desc->Size = b->params.size;
+}
+
+void uiFontButtonOnChanged(uiFontButton *b, void (*f)(uiFontButton *, void *), void *data)
+{
+	b->onChanged = f;
+	b->onChangedData = data;
+}
+
+uiFontButton *uiNewFontButton(void)
+{
+	uiFontButton *b;
+
+	uiWindowsNewControl(uiFontButton, b);
+
+	b->hwnd = uiWindowsEnsureCreateControlHWND(0,
+		L"button", L"you should not be seeing this",
+		BS_PUSHBUTTON | WS_TABSTOP,
+		hInstance, NULL,
+		TRUE);
+
+	uiprivLoadInitialFontDialogParams(&(b->params));
+
+	uiWindowsRegisterWM_COMMANDHandler(b->hwnd, onWM_COMMAND, uiControl(b));
+	uiFontButtonOnChanged(b, defaultOnChanged, NULL);
+
+	updateFontButtonLabel(b);
+
+	return b;
+}
+
+void uiFreeFontButtonFont(uiFontDescriptor *desc)
+{
+	uiFreeFontDescriptor(desc);
+}