First Commit

libui-ng/windows/checkbox.cpp

@@ -0,0 +1,117 @@
+// 7 april 2015
+#include "uipriv_windows.hpp"
+
+struct uiCheckbox {
+	uiWindowsControl c;
+	HWND hwnd;
+	void (*onToggled)(uiCheckbox *, void *);
+	void *onToggledData;
+};
+
+static BOOL onWM_COMMAND(uiControl *cc, HWND hwnd, WORD code, LRESULT *lResult)
+{
+	uiCheckbox *c = uiCheckbox(cc);
+	WPARAM check;
+
+	if (code != BN_CLICKED)
+		return FALSE;
+
+	// we didn't use BS_AUTOCHECKBOX (http://blogs.msdn.com/b/oldnewthing/archive/2014/05/22/10527522.aspx) so we have to manage the check state ourselves
+	check = BST_CHECKED;
+	if (SendMessage(c->hwnd, BM_GETCHECK, 0, 0) == BST_CHECKED)
+		check = BST_UNCHECKED;
+	SendMessage(c->hwnd, BM_SETCHECK, check, 0);
+
+	(*(c->onToggled))(c, c->onToggledData);
+	*lResult = 0;
+	return TRUE;
+}
+
+static void uiCheckboxDestroy(uiControl *cc)
+{
+	uiCheckbox *c = uiCheckbox(cc);
+
+	uiWindowsUnregisterWM_COMMANDHandler(c->hwnd);
+	uiWindowsEnsureDestroyWindow(c->hwnd);
+	uiFreeControl(uiControl(c));
+}
+
+uiWindowsControlAllDefaultsExceptDestroy(uiCheckbox)
+
+// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
+#define checkboxHeight 10
+// from http://msdn.microsoft.com/en-us/library/windows/desktop/bb226818%28v=vs.85%29.aspx
+#define checkboxXFromLeftOfBoxToLeftOfLabel 12
+
+static void uiCheckboxMinimumSize(uiWindowsControl *cc, int *width, int *height)
+{
+	uiCheckbox *c = uiCheckbox(cc);
+	uiWindowsSizing sizing;
+	int x, y;
+
+	x = checkboxXFromLeftOfBoxToLeftOfLabel;
+	y = checkboxHeight;
+	uiWindowsGetSizing(c->hwnd, &sizing);
+	uiWindowsSizingDlgUnitsToPixels(&sizing, &x, &y);
+	*width = x + uiWindowsWindowTextWidth(c->hwnd);
+	*height = y;
+}
+
+static void defaultOnToggled(uiCheckbox *c, void *data)
+{
+	// do nothing
+}
+
+char *uiCheckboxText(uiCheckbox *c)
+{
+	return uiWindowsWindowText(c->hwnd);
+}
+
+void uiCheckboxSetText(uiCheckbox *c, const char *text)
+{
+	uiWindowsSetWindowText(c->hwnd, text);
+	// changing the text might necessitate a change in the checkbox's size
+	uiWindowsControlMinimumSizeChanged(uiWindowsControl(c));
+}
+
+void uiCheckboxOnToggled(uiCheckbox *c, void (*f)(uiCheckbox *, void *), void *data)
+{
+	c->onToggled = f;
+	c->onToggledData = data;
+}
+
+int uiCheckboxChecked(uiCheckbox *c)
+{
+	return SendMessage(c->hwnd, BM_GETCHECK, 0, 0) == BST_CHECKED;
+}
+
+void uiCheckboxSetChecked(uiCheckbox *c, int checked)
+{
+	WPARAM check;
+
+	check = BST_CHECKED;
+	if (!checked)
+		check = BST_UNCHECKED;
+	SendMessage(c->hwnd, BM_SETCHECK, check, 0);
+}
+
+uiCheckbox *uiNewCheckbox(const char *text)
+{
+	uiCheckbox *c;
+	WCHAR *wtext;
+
+	uiWindowsNewControl(uiCheckbox, c);
+
+	wtext = toUTF16(text);
+	c->hwnd = uiWindowsEnsureCreateControlHWND(0,
+		L"button", wtext,
+		BS_CHECKBOX | WS_TABSTOP,
+		hInstance, NULL,
+		TRUE);
+	uiprivFree(wtext);
+
+	uiWindowsRegisterWM_COMMANDHandler(c->hwnd, onWM_COMMAND, uiControl(c));
+	uiCheckboxOnToggled(c, defaultOnToggled, NULL);
+
+	return c;
+}