First Commit

libui-ng/windows/button.cpp

@@ -0,0 +1,104 @@
+// 7 april 2015
+#include "uipriv_windows.hpp"
+
+struct uiButton {
+	uiWindowsControl c;
+	HWND hwnd;
+	void (*onClicked)(uiButton *, void *);
+	void *onClickedData;
+};
+
+static BOOL onWM_COMMAND(uiControl *c, HWND hwnd, WORD code, LRESULT *lResult)
+{
+	uiButton *b = uiButton(c);
+
+	if (code != BN_CLICKED)
+		return FALSE;
+	(*(b->onClicked))(b, b->onClickedData);
+	*lResult = 0;
+	return TRUE;
+}
+
+static void uiButtonDestroy(uiControl *c)
+{
+	uiButton *b = uiButton(c);
+
+	uiWindowsUnregisterWM_COMMANDHandler(b->hwnd);
+	uiWindowsEnsureDestroyWindow(b->hwnd);
+	uiFreeControl(uiControl(b));
+}
+
+uiWindowsControlAllDefaultsExceptDestroy(uiButton)
+
+// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
+#define buttonHeight 14
+
+static void uiButtonMinimumSize(uiWindowsControl *c, int *width, int *height)
+{
+	uiButton *b = uiButton(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 defaultOnClicked(uiButton *b, void *data)
+{
+	// do nothing
+}
+
+char *uiButtonText(uiButton *b)
+{
+	return uiWindowsWindowText(b->hwnd);
+}
+
+void uiButtonSetText(uiButton *b, const char *text)
+{
+	uiWindowsSetWindowText(b->hwnd, text);
+	// changing the text might necessitate a change in the button's size
+	uiWindowsControlMinimumSizeChanged(uiWindowsControl(b));
+}
+
+void uiButtonOnClicked(uiButton *b, void (*f)(uiButton *, void *), void *data)
+{
+	b->onClicked = f;
+	b->onClickedData = data;
+}
+
+uiButton *uiNewButton(const char *text)
+{
+	uiButton *b;
+	WCHAR *wtext;
+
+	uiWindowsNewControl(uiButton, b);
+
+	wtext = toUTF16(text);
+	b->hwnd = uiWindowsEnsureCreateControlHWND(0,
+		L"button", wtext,
+		BS_PUSHBUTTON | WS_TABSTOP,
+		hInstance, NULL,
+		TRUE);
+	uiprivFree(wtext);
+
+	uiWindowsRegisterWM_COMMANDHandler(b->hwnd, onWM_COMMAND, uiControl(b));
+	uiButtonOnClicked(b, defaultOnClicked, NULL);
+
+	return b;
+}