Started implementing uiFontButton on OS X.

darwin/GNUfiles.mk

@@ -14,6 +14,7 @@ MFILES += \
 	darwin/draw.m \
 	darwin/drawtext.m \
 	darwin/entry.m \
+	darwin/fontbutton.m \
 	darwin/group.m \
 	darwin/label.m \
 	darwin/main.m \

darwin/fontbutton.m

@@ -0,0 +1,134 @@
+// 14 april 2016
+#import "uipriv_darwin.h"
+
+@interface fontButton : NSButton {
+	uiFontButton *libui_b;
+	NSFont *libui_font;
+}
+- (id)initWithFrame:(NSRect)frame libuiFontButton:(uiFontButton *)b;
+- (void)updateFontButtonLabel;
+- (IBAction)fontButtonClicked:(id)sender;
+- (void)activateFontButton;
+- (void)deactivateFontButton:(BOOL)activatingAnother;
+@end
+
+// only one may be active at one time
+static fontButton *activeFontButton = nil;
+
+struct uiFontButton {
+	uiDarwinControl c;
+	fontButton *button;
+};
+
+uiDarwinDefineControl(
+	uiFontButton,							// type name
+	uiFontButtonType,						// type function
+	button								// handle
+)
+
+@implementation fontButton
+
+- (id)initWithFrame:(NSRect)frame libuiFontButton:(uiFontButton *)b
+{
+	self = [super initWithFrame:frame];
+	if (self) {
+		self->libui_b = b;
+
+		// imitate a NSColorWell in appearance
+		[self setButtonType:NSPushOnPushOffButton];
+		[self setBordered:YES];
+		[self setBezelStyle:NSShadowlessSquareBezelStyle];
+
+		// default font values according to the CTFontDescriptor reference
+		// this is autoreleased (thanks swillits in irc.freenode.net/#macdev)
+		self->libui_font = [[NSFont fontWithName:@"Helvetica" size:12.0] retain];
+		[self updateFontButtonLabel];
+
+		// for when clicked
+		[self setTarget:self];
+		[self setAction:@selector(fontButtonClicked:)];
+	}
+	return self;
+}
+
+- (void)updateFontButtonLabel
+{
+	NSString *title;
+
+	title = [NSString stringWithFormat:@"%@ %g",
+		[self->libui_font displayName],
+		[self->libui_font pointSize]];
+	[self setTitle:title];
+}
+
+- (IBAction)fontButtonClicked:(id)sender
+{
+	if ([self state] == NSOnState)
+		[self activateFontButton];
+	else
+		[self deactivateFontButton:NO];
+}
+
+- (void)activateFontButton
+{
+	NSFontManager *sfm;
+
+	sfm = [NSFontManager sharedFontManager];
+	if (activeFontButton != nil)
+		[activeFontButton deactivateFontButton:YES];
+	[sfm setTarget:self];
+	[sfm setSelectedFont:self->libui_font isMultiple:NO];
+	[sfm orderFrontFontPanel:self];
+	activeFontButton = self;
+	[self setState:NSOnState];
+}
+
+- (void)deactivateFontButton:(BOOL)activatingAnother
+{
+	NSFontManager *sfm;
+
+	sfm = [NSFontManager sharedFontManager];
+	[sfm setTarget:nil];
+	if (!activatingAnother)
+		[[NSFontPanel sharedFontPanel] orderOut:self];
+	activeFontButton = nil;
+	[self setState:NSOffState];
+}
+
+- (void)changeFont:(id)sender
+{
+	NSFontManager *fm;
+	NSFont *old;
+
+	fm = (NSFontManager *) sender;
+	old = self->libui_font;
+	self->libui_font = [sender convertFont:self->libui_font];
+	// TODO do we get it back retained?
+	// TODO is it even retained when we get it, regardless of value?
+	if (self->libui_font != old)
+		[old release];
+	[self updateFontButtonLabel];
+}
+
+- (NSUInteger)validModesForFontPanel:(NSFontPanel *)panel
+{
+	return NSFontPanelFaceModeMask |
+		NSFontPanelSizeModeMask |
+		NSFontPanelCollectionModeMask;
+}
+
+@end
+
+uiFontButton *uiNewFontButton(void)
+{
+	uiFontButton *b;
+
+	b = (uiFontButton *) uiNewControl(uiFontButtonType());
+
+	b->button = [[fontButton alloc] initWithFrame:NSZeroRect libuiFontButton:b];
+	uiDarwinSetControlFont(b->button, NSRegularControlSize);
+
+	uiDarwinFinishNewControl(b, uiFontButton);
+
+	return b;
+}

test/main.c

@@ -127,7 +127,7 @@ int main(int argc, char *argv[])
 	page9 = makePage9();
 	uiTabAppend(innerTab, "Page 9", uiControl(page9));
 
-	page10 = makePage9();
+	page10 = makePage10();
 	uiTabAppend(innerTab, "Page 10", uiControl(page10));
 
 	if (startspaced)