From 1ecf3a7694bad8e8c363608cc357b84bae34b115 Mon Sep 17 00:00:00 2001
From: Andreas Frisch <fraxinas@opendreambox.org>
Date: Tue, 8 Aug 2017 08:51:53 +0200
Subject: [PATCH] WIP: implement kemonomimi/facial masks dragging

---
 photobooth.ui   | 28 +++++++++++++++++++++---
 photoboothwin.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++
 photoboothwin.h |  3 +++
 3 files changed, 85 insertions(+), 3 deletions(-)

diff --git a/photobooth.ui b/photobooth.ui
index f5ad4f6..3172af8 100644
--- a/photobooth.ui
+++ b/photobooth.ui
@@ -48,7 +48,7 @@
           </packing>
         </child>
         <child type="overlay">
-          <object class="GtkFixed">
+          <object class="GtkFixed" id="fixed">
             <property name="visible">True</property>
             <property name="can_focus">False</property>
             <child>
@@ -156,9 +156,31 @@
                 <property name="vexpand">True</property>
                 <property name="stock">gtk-missing-image</property>
               </object>
+            </child>
+            <child>
+              <object class="GtkEventBox" id="mask_event">
+                <property name="width_request">100</property>
+                <property name="height_request">80</property>
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="events">GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_BUTTON1_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK</property>
+                <signal name="button-press-event" handler="photo_booth_window_mask_press" swapped="no"/>
+                <signal name="button-release-event" handler="photo_booth_window_mask_release" swapped="no"/>
+                <signal name="motion-notify-event" handler="photo_booth_window_mask_motion" swapped="no"/>
+                <child>
+                  <object class="GtkImage" id="mask">
+                    <property name="width_request">100</property>
+                    <property name="height_request">80</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="pixbuf">overlays/mask_nasenbrille.png</property>
+                    <property name="icon_size">5</property>
+                  </object>
+                </child>
+              </object>
               <packing>
-                <property name="x">0</property>
-                <property name="y">0</property>
+                <property name="x">435</property>
+                <property name="y">394</property>
               </packing>
             </child>
             <style>
diff --git a/photoboothwin.c b/photoboothwin.c
index acea242..57fa62a 100644
--- a/photoboothwin.c
+++ b/photoboothwin.c
@@ -28,6 +28,11 @@ struct _PhotoBoothWindowPrivate
 	GtkLabel *countdown_label;
 	GtkScale *copies;
 	gint countdown;
+	GtkImage *mask;
+	GtkWidget *mask_event;
+	GtkFixed *fixed;
+	gboolean dragging;
+	gint startoffsetx, startoffsety;
 };
 
 G_DEFINE_TYPE_WITH_PRIVATE (PhotoBoothWindow, photo_booth_window, GTK_TYPE_APPLICATION_WINDOW);
@@ -64,6 +69,9 @@ static void photo_booth_window_class_init (PhotoBoothWindowClass *klass)
 	gtk_widget_class_bind_template_child_private (GTK_WIDGET_CLASS (klass), PhotoBoothWindow, spinner);
 	gtk_widget_class_bind_template_child_private (GTK_WIDGET_CLASS (klass), PhotoBoothWindow, countdown_label);
 	gtk_widget_class_bind_template_child_private (GTK_WIDGET_CLASS (klass), PhotoBoothWindow, copies);
+	gtk_widget_class_bind_template_child_private (GTK_WIDGET_CLASS (klass), PhotoBoothWindow, mask);
+	gtk_widget_class_bind_template_child_private (GTK_WIDGET_CLASS (klass), PhotoBoothWindow, mask_event);
+	gtk_widget_class_bind_template_child_private (GTK_WIDGET_CLASS (klass), PhotoBoothWindow, fixed);
 	gtk_widget_class_bind_template_child (GTK_WIDGET_CLASS (klass), PhotoBoothWindow, image);
 	gtk_widget_class_bind_template_child (GTK_WIDGET_CLASS (klass), PhotoBoothWindow, button_cancel);
 	gtk_widget_class_bind_template_child (GTK_WIDGET_CLASS (klass), PhotoBoothWindow, button_print);
@@ -99,6 +107,10 @@ static void photo_booth_window_init (PhotoBoothWindow *win)
 	gtk_button_set_label (win->button_print, _("Print photo"));
 	gtk_button_set_label (win->button_upload, _("Upload photo"));
 	g_timeout_add (1000, (GSourceFunc) _pbw_clock_tick, win->status_clock);
+
+	gtk_widget_set_has_window (GTK_WIDGET (priv->fixed), TRUE);
+	priv->dragging = FALSE;
+	priv->startoffsetx = 0, priv->startoffsety = 0;
 }
 
 void photo_booth_window_add_gtkgstwidget (PhotoBoothWindow *win, GtkWidget *gtkgstwidget)
@@ -235,6 +247,51 @@ gchar* photo_booth_window_format_copies_value (GtkScale *scale, gdouble value, g
 	return g_strdup_printf (_("%d prints"), intval);
 }
 
+gboolean photo_booth_window_mask_press (GtkWidget *widget, GdkEventButton *event, gpointer user_data)
+{
+	PhotoBoothWindowPrivate *priv;
+	GtkWidget* p;
+	gint widgetoffsetx, widgetoffsety, screenoffsetx, screenoffsety;
+
+	priv = photo_booth_window_get_instance_private (PHOTO_BOOTH_WINDOW (user_data));
+
+	priv->dragging = TRUE;
+	p = gtk_widget_get_parent (widget);
+	gdk_window_get_position (gtk_widget_get_parent_window (p), &widgetoffsetx, &widgetoffsety);
+
+	p = gtk_widget_get_parent (p);
+	gdk_window_get_position (gtk_widget_get_parent_window (p), &screenoffsetx, &screenoffsety);
+
+	priv->startoffsetx = (int)event->x+widgetoffsetx+screenoffsetx;
+	priv->startoffsety = (int)event->y+widgetoffsety+screenoffsety;
+
+	return TRUE;
+}
+
+gboolean photo_booth_window_mask_release (GtkWidget *widget, GdkEventButton *event, gpointer user_data)
+{
+	PhotoBoothWindowPrivate *priv;
+	priv = photo_booth_window_get_instance_private (PHOTO_BOOTH_WINDOW (user_data));
+	priv->dragging = FALSE;
+	return TRUE;
+}
+
+gboolean photo_booth_window_mask_motion (GtkWidget *widget, GdkEventMotion *event, gpointer user_data)
+{
+	PhotoBoothWindowPrivate *priv;
+	priv = photo_booth_window_get_instance_private (PHOTO_BOOTH_WINDOW (user_data));
+
+	GST_TRACE_OBJECT (user_data, "event (%.0f,%.0f) root (%d,%d) off (%d,%d)", event->x, event->y, (int)event->x_root, (int)event->y_root, priv->startoffsetx, priv->startoffsety);
+
+	if (priv->dragging)
+	{
+		int x = (int)event->x_root - priv->startoffsetx;
+		int y = (int)event->y_root - priv->startoffsety;
+		gtk_fixed_move (GTK_FIXED (gtk_widget_get_parent (widget)), GTK_WIDGET (widget), x, y);
+	}
+	return TRUE;
+}
+
 PhotoBoothWindow * photo_booth_window_new (PhotoBooth *pb)
 {
 	return g_object_new (PHOTO_BOOTH_WINDOW_TYPE, "application", pb, NULL);
diff --git a/photoboothwin.h b/photoboothwin.h
index a336f57..bf23d79 100644
--- a/photoboothwin.h
+++ b/photoboothwin.h
@@ -54,6 +54,9 @@ void                    photo_booth_window_hide_cursor      (PhotoBoothWindow *w
 void                    photo_booth_window_show_cursor      (PhotoBoothWindow *win);
 void                    photo_booth_window_set_copies_show  (PhotoBoothWindow *win, gint min, gint max, gint def);
 gint                    photo_booth_window_get_copies_hide  (PhotoBoothWindow *win);
+gboolean                photo_booth_window_mask_press       (GtkWidget *widget, GdkEventButton *event, gpointer user_data);
+gboolean                photo_booth_window_mask_release     (GtkWidget *widget, GdkEventButton *event, gpointer user_data);
+gboolean                photo_booth_window_mask_motion      (GtkWidget *widget, GdkEventMotion *event, gpointer user_data);
 
 G_END_DECLS