From 2edc8f09257b4bbf13ac64ba2ead16359e93de8b Mon Sep 17 00:00:00 2001
From: Nick Bowler <nbowler@draconx.ca>
Date: Sun, 7 Feb 2010 21:24:32 -0500
Subject: [PATCH] lbxgui: Add support for animating images.

---
 src/gui/lbxgui.c     | 80 +++++++++++++++++++++++++++++++++++++++++++-
 src/gui/lbxgui.glade | 19 +++++++++++
 2 files changed, 98 insertions(+), 1 deletion(-)

diff --git a/src/gui/lbxgui.c b/src/gui/lbxgui.c
index f943be3..0592a7e 100644
--- a/src/gui/lbxgui.c
+++ b/src/gui/lbxgui.c
@@ -1,6 +1,8 @@
 #include <config.h>
 #include <stdlib.h>
 #include <string.h>
+#include <math.h>
+
 #include <gtk/gtk.h>
 
 #include "lbx.h"
@@ -11,7 +13,6 @@ static GtkBuilder *builder;
 
 static GtkWidget *canvas;
 static LBX_IMG *image;
-
 /* LBX images can have up to three palettes, with each superseding the last. */
 static struct lbx_colour palette_external[256];
 static struct lbx_colour palette_internal[256];
@@ -19,6 +20,24 @@ static struct lbx_colour palette_override[256];
 
 GdkPixbuf *framebuf;
 
+void play_toggled(GtkToggleButton *button, gpointer data)
+{
+	gboolean active = gtk_toggle_button_get_active(button);
+	GtkWidget *spin;
+
+	if (active && !image) {
+		gtk_toggle_button_set_active(button, FALSE);
+		return;
+	}
+
+	spin = GTK_WIDGET(gtk_builder_get_object(builder, "framespin"));
+	gtk_widget_set_sensitive(spin, !active);
+
+	if (active) {
+		gtk_spin_button_set_value(GTK_SPIN_BUTTON(spin), 0);
+	}
+}
+
 static void get_colour(unsigned char index, unsigned char out[static 3])
 {
 	struct lbx_colour *colour;
@@ -80,6 +99,63 @@ void set_frame(GtkSpinButton *spin, gpointer data)
 	gdk_window_invalidate_rect(canvas->window, NULL, FALSE);
 }
 
+static void tick(void *p, double delta)
+{
+	static double elapsed = 0;
+	double seconds_per_frame = 1.0/15;
+	struct lbx_imginfo info;
+	GtkSpinButton   *spin;
+	GtkToggleButton *play;
+	unsigned frame;
+
+	if (!image)
+		return;
+
+	lbximg_getinfo(image, &info);
+	spin = GTK_SPIN_BUTTON(gtk_builder_get_object(builder, "framespin"));
+	play = GTK_TOGGLE_BUTTON(gtk_builder_get_object(builder, "playbutton"));
+
+	frame = gtk_spin_button_get_value_as_int(spin);
+	if (!gtk_toggle_button_get_active(play))
+		return;
+
+	elapsed += delta;
+	while (elapsed > seconds_per_frame) {
+		elapsed -= seconds_per_frame;
+
+		if (++frame >= info.nframes) {
+			if (!info.looping) {
+				gtk_toggle_button_set_active(play, FALSE);
+				break;
+			}
+
+			frame = info.loopstart;
+		}
+
+		gtk_spin_button_set_value(spin, frame);
+	}
+}
+
+static gboolean timeout(gpointer data)
+{
+	static double lasttime = INFINITY;
+	static GTimer *timer;
+
+	if (isinf(lasttime)) {
+		timer = g_timer_new();
+		if (timer) {
+			lasttime = 0;
+		}
+	} else {
+		double time = g_timer_elapsed(timer, NULL);
+
+		tick(data, time - lasttime);
+		lasttime = time;
+	}
+
+	return TRUE;
+}
+
 gboolean canvas_expose(GtkWidget *canvas, GdkEventExpose *event, gpointer data)
 {
 	if (!framebuf)
@@ -310,6 +386,8 @@ int main(int argc, char **argv)
 
 	interface_init();
 	gtk_builder_connect_signals(builder, window);
+
+	g_timeout_add(33, timeout, NULL);
 	gtk_widget_show_all(window);
 	gtk_main();
 }
diff --git a/src/gui/lbxgui.glade b/src/gui/lbxgui.glade
index fb12bce..510098b 100644
--- a/src/gui/lbxgui.glade
+++ b/src/gui/lbxgui.glade
@@ -151,6 +151,25 @@
                         <property name="position">3</property>
                       </packing>
                     </child>
+                    <child>
+                      <object class="GtkToggleButton" id="playbutton">
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="receives_default">True</property>
+                        <signal name="toggled" handler="play_toggled"/>
+                        <child>
+                          <object class="GtkImage" id="image1">
+                            <property name="visible">True</property>
+                            <property name="stock">gtk-media-play</property>
+                          </object>
+                        </child>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="padding">3</property>
+                        <property name="position">4</property>
+                      </packing>
+                    </child>
                   </object>
                   <packing>
                     <property name="expand">False</property>
-- 
2.43.2