From afac890502d6bbba9cf50a6e9698a22bc0642f65 Mon Sep 17 00:00:00 2001
From: Pietro Gagliardi <pietro10@mac.com>
Date: Tue, 3 May 2016 12:34:11 -0400
Subject: [PATCH] More work on the GTK+ date-time picker. It now pops up like a
 combobox!

---
 _wip/gtkdtp/main.c | 64 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 61 insertions(+), 3 deletions(-)

diff --git a/_wip/gtkdtp/main.c b/_wip/gtkdtp/main.c
index 07fb44e6..5dc2429e 100644
--- a/_wip/gtkdtp/main.c
+++ b/_wip/gtkdtp/main.c
@@ -3,19 +3,77 @@
 
 // #qo pkg-config: gtk+-3.0
 
+GtkWidget *win;
+GtkWidget *dtp;
+
+// based on gtk_combo_box_list_position() in the GTK+ source code
+// TODO monitor detection
+static void allocationToScreen(GtkWidget *w, GtkAllocation *a)
+{
+	gint x, y;
+	GdkWindow *window;
+
+	x = 0;
+	y = 0;
+	if (!gtk_widget_get_has_window(w)) {
+		x = a->x;
+		y = a->y;
+	}
+	window = gtk_widget_get_window(w);
+	gdk_window_get_root_coords(window, x, y, &x, &y);
+	if (gtk_widget_get_direction(w) == GTK_TEXT_DIR_RTL)
+		x += a->width;
+	a->x = x;
+	a->y = y;
+}
+
+static void toggled(GtkToggleButton *t, gpointer data)
+{
+	GtkWidget *toplevel;
+	GtkAllocation allocation;
+
+	toplevel = gtk_widget_get_toplevel(GTK_WIDGET(t));
+	if (GTK_IS_WINDOW(toplevel))
+		gtk_window_group_add_window(gtk_window_get_group(GTK_WINDOW(toplevel)),
+			GTK_WINDOW(win));
+
+	gtk_widget_get_allocation(GTK_WIDGET(t), &allocation);
+	allocationToScreen(GTK_WIDGET(t), &allocation);
+	gtk_window_move(GTK_WINDOW(win), allocation.x, allocation.y + allocation.height);
+
+	gtk_widget_show_all(win);
+}
+
 int main(void)
 {
 	GtkWidget *mainwin;
-	GtkWidget *dtp;
+	GtkWidget *button;
 
 	gtk_init(NULL, NULL);
 
 	mainwin = gtk_window_new(GTK_WINDOW_TOPLEVEL);
-	gtk_container_set_border_width(GTK_CONTAINER(mainwin), 12);
 	g_signal_connect(mainwin, "destroy", G_CALLBACK(gtk_main_quit), NULL);
+	gtk_container_set_border_width(GTK_CONTAINER(mainwin), 12);
+	button = gtk_toggle_button_new_with_label("Click");
+	g_signal_connect(button, "toggled", G_CALLBACK(toggled), NULL);
+	gtk_container_add(GTK_CONTAINER(mainwin), button);
+
+	win = gtk_window_new(GTK_WINDOW_POPUP);
+	gtk_window_set_resizable(GTK_WINDOW(win), FALSE);
+	gtk_window_set_attached_to(GTK_WINDOW(win), button);
+	// TODO set_keep_above()?
+	gtk_window_set_decorated(GTK_WINDOW(win), FALSE);
+	gtk_window_set_deletable(GTK_WINDOW(win), FALSE);
+	gtk_window_set_type_hint(GTK_WINDOW(win), GDK_WINDOW_TYPE_HINT_COMBO);
+	gtk_window_set_skip_taskbar_hint(GTK_WINDOW(win), TRUE);
+	gtk_window_set_skip_pager_hint(GTK_WINDOW(win), TRUE);
+	// TODO accept_focus()?
+	// TODO focus_on_map()?
+	gtk_window_set_has_resize_grip(GTK_WINDOW(win), FALSE);
+	gtk_container_set_border_width(GTK_CONTAINER(win), 12);
 
 	dtp = GTK_WIDGET(g_object_new(dateTimePickerWidget_get_type(), NULL));
-	gtk_container_add(GTK_CONTAINER(mainwin), dtp);
+	gtk_container_add(GTK_CONTAINER(win), dtp);
 
 	gtk_widget_show_all(mainwin);
 	gtk_main();