Implemented uiCheckbox on Windows. Fixed build issues in the test program.

checkbox_windows.c

@@ -0,0 +1,109 @@
+// 7 april 2015
+#include "uipriv_windows.h"
+
+struct checkbox {
+	uiControl *c;
+	void (*onToggled)(uiControl *, void *);
+	void *onToggledData;
+};
+
+#define C(x) ((struct checkbox *) (x))
+
+static BOOL onWM_COMMAND(uiControl *c, WPARAM wParam, LPARAM lParam, void *data, LRESULT *lResult)
+{
+	HWND hwnd;
+	WPARAM check;
+
+	if (HIWORD(wParam) != BN_CLICKED)
+		return FALSE;
+
+	// we didn't use BS_AUTOCHECKBOX (see controls_windows.go) so we have to manage the check state ourselves
+	hwnd = (HWND) uiControlHandle(c);
+	check = BST_CHECKED;
+	if (SendMessage(hwnd, BM_GETCHECK, 0, 0) == BST_CHECKED)
+		check = BST_UNCHECKED;
+	SendMessage(hwnd, BM_SETCHECK, check, 0);
+
+	(*(C(data)->onToggled))(c, C(data)->onToggledData);
+	*lResult = 0;
+	return TRUE;
+}
+
+static BOOL onWM_NOTIFY(uiControl *c, WPARAM wParam, LPARAM lParam, void *data, LRESULT *lResult)
+{
+	return FALSE;
+}
+
+static void onWM_DESTROY(uiControl *c, void *data)
+{
+	struct checkbox *cc = (struct checkbox *) data;
+
+	uiFree(cc);
+}
+
+// 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 preferredSize(uiControl *c, int baseX, int baseY, LONG internalLeading, intmax_t *width, intmax_t *height)
+{
+	*width = uiDlgUnitToX(checkboxXFromLeftOfBoxToLeftOfLabel, baseX) + uiWindowsWindowTextWidth((HWND) uiControlHandle(c));
+	*height = uiDlgUnitToY(checkboxHeight, baseY);
+}
+
+static void defaultOnToggled(uiControl *c, void *data)
+{
+	// do nothing
+}
+
+uiControl *uiNewCheckbox(const char *text)
+{
+	struct checkbox *c;
+	uiWindowsNewControlParams p;
+	WCHAR *wtext;
+	HWND hwnd;
+
+	c = uiNew(struct checkbox);
+
+	p.dwExStyle = 0;
+	p.lpClassName = L"button";
+	wtext = toUTF16(text);
+	p.lpWindowName = wtext;
+	p.dwStyle = BS_CHECKBOX | WS_TABSTOP;
+	p.hInstance = hInstance;
+	p.onWM_COMMAND = onWM_COMMAND;
+	p.onWM_NOTIFY = onWM_NOTIFY;
+	p.onWM_DESTROY = onWM_DESTROY;
+	p.onCommandNotifyDestroyData = c;
+	p.preferredSize = preferredSize;
+	p.data = c;
+	c->c = uiWindowsNewControl(&p);
+	uiFree(wtext);
+
+	hwnd = (HWND) uiControlHandle(c->c);
+	SendMessageW(hwnd, WM_SETFONT, (WPARAM) hMessageFont, (LPARAM) TRUE);
+
+	c->onToggled = defaultOnToggled;
+
+	return c->c;
+}
+
+char *uiCheckboxText(uiControl *c)
+{
+	return uiWindowsControlText(c);
+}
+
+void uiCheckboxSetText(uiControl *c, const char *text)
+{
+	uiWindowsControlSetText(c, text);
+}
+
+void uiCheckboxOnToggled(uiControl *c, void (*f)(uiControl *, void *), void *data)
+{
+	struct checkbox *cc;
+
+	cc = (struct checkbox *) uiWindowsControlData(c);
+	cc->onToggled = f;
+	cc->onToggledData = data;
+}

test.c

@@ -91,7 +91,7 @@ int main(int argc, char *argv[])
 	uiWindowOnClosing(w, onClosing, NULL);
 
 	stacks[0] = uiNewVerticalStack();
-	uiWindowSetChild(w, staacks[0]);
+	uiWindowSetChild(w, stacks[0]);
 
 	e = uiNewEntry();
 	uiStackAdd(stacks[0], e, 0);
@@ -116,7 +116,7 @@ int main(int argc, char *argv[])
 
 	// this will also be used to make sure tab stops work properly when inserted out of creation order, especially on Windows
 	spaced = uiNewCheckbox("Spaced");
-	uiCheckboxOnClicked(spaced, setSpaced, NULL);
+	uiCheckboxOnToggled(spaced, setSpaced, NULL);
 
 	stacks[3] = uiNewHorizontalStack();
 	getButton = uiNewButton("Get Checkbox Text");

ui.h

@@ -46,7 +46,7 @@ char *uiEntryText(uiControl *);
 void uiEntrySetText(uiControl *, const char *);
 
 uiControl *uiNewCheckbox(const char *);
-char *uiCheckboxText(void);
+char *uiCheckboxText(uiControl *);
 void uiCheckboxSetText(uiControl *, const char *);
 void uiCheckboxOnToggled(uiControl *, void (*)(uiControl *, void *), void *);