Implemented uiFontButton on GTK+.

unix/GNUfiles.mk

@@ -12,6 +12,7 @@ CFILES += \
 	unix/datetimepicker.c \
 	unix/draw.c \
 	unix/entry.c \
+	unix/fontbutton.c \
 	unix/group.c \
 	unix/label.c \
 	unix/main.c \

unix/fontbutton.c

@@ -0,0 +1,67 @@
+// 14 april 2016
+#include "uipriv_unix.h"
+
+struct uiFontButton {
+	uiUnixControl c;
+	GtkWidget *widget;
+	GtkButton *button;
+	GtkFontButton *fb;
+	GtkFontChooser *fc;
+};
+
+uiUnixDefineControl(
+	uiFontButton,							// type name
+	uiFontButtonType						// type function
+)
+
+// TODO NOTE no need to inhibit the signal; font-set is documented as only being sent when the user changes the font
+static void onFontSet(GtkFontButton *button, gpointer data)
+{
+	uiFontButton *b = uiFontButton(data);
+
+//TODO	(*(b->onClicked))(b, b->onClickedData);
+}
+
+#if 0
+TODO
+static void defaultOnClicked(uiButton *b, void *data)
+{
+	// do nothing
+}
+#endif
+
+#if 0
+TODO
+void uiButtonOnClicked(uiButton *b, void (*f)(uiButton *, void *), void *data)
+{
+	b->onClicked = f;
+	b->onClickedData = data;
+}
+#endif
+
+uiFontButton *uiNewFontButton(void)
+{
+	uiFontButton *b;
+
+	b = (uiFontButton *) uiNewControl(uiFontButtonType());
+
+	b->widget = gtk_font_button_new();
+	b->button = GTK_BUTTON(b->widget);
+	b->fb = GTK_FONT_BUTTON(b->widget);
+	b->fc = GTK_FONT_CHOOSER(b->widget);
+
+	// match behavior on other platforms
+	gtk_font_button_set_show_style(b->fb, TRUE);
+	gtk_font_button_set_show_size(b->fb, TRUE);
+	gtk_font_button_set_use_font(b->fb, FALSE);
+	gtk_font_button_set_use_size(b->fb, FALSE);
+	// other customizations
+	gtk_font_chooser_set_show_preview_entry(b->fc, TRUE);
+
+	g_signal_connect(b->widget, "font-set", G_CALLBACK(onFontSet), b);
+//TODO	uiButtonOnClicked(b, defaultOnClicked, NULL);
+
+	uiUnixFinishNewControl(b, uiFontButton);
+
+	return b;
+}