From c32c6f5ad024cf4ca396b867d82693501e341659 Mon Sep 17 00:00:00 2001
From: Jon Bergli Heier <snakebite@jvnv.net>
Date: Tue, 9 Mar 2010 19:14:19 +0100
Subject: Implemented zoom buttons.

---
 wallpapers.c  | 15 +++++++++++++++
 walls.ui      |  2 ++
 window_main.c | 28 +++++++++++++++++++++++++++-
 3 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/wallpapers.c b/wallpapers.c
index a4bfb60..0d37f5e 100644
--- a/wallpapers.c
+++ b/wallpapers.c
@@ -223,3 +223,18 @@ GdkPixbuf *resize_pixbuf(GdkPixbuf *orig, gint win_width, gint win_height, gint
 
 	return pb;
 }
+
+GdkPixbuf *zoom_pixbuf(GdkPixbuf *orig, gdouble zoom) {
+	GdkPixbuf *pb;
+	gint img_width, img_height, width, height;
+
+	img_width = gdk_pixbuf_get_width(orig);
+	img_height = gdk_pixbuf_get_height(orig);
+
+	width = img_width * zoom;
+	height = img_height * zoom;
+	pb = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, width, height);
+	gdk_pixbuf_scale(orig, pb, 0, 0, width, height, 0, 0,
+			(gdouble)width / (gdouble)img_width, (gdouble)height / (gdouble)img_height, GDK_INTERP_BILINEAR);
+	return pb;
+}
diff --git a/walls.ui b/walls.ui
index 7f3a410..cb6f3bd 100644
--- a/walls.ui
+++ b/walls.ui
@@ -133,6 +133,7 @@
                 <property name="label" translatable="yes">Zoom _In</property>
                 <property name="use_underline">True</property>
                 <property name="stock_id">gtk-zoom-in</property>
+                <signal name="clicked" handler="on_zoom_in_clicked"/>
               </object>
               <packing>
                 <property name="expand">False</property>
@@ -145,6 +146,7 @@
                 <property name="label" translatable="yes">Zoom _Out</property>
                 <property name="use_underline">True</property>
                 <property name="stock_id">gtk-zoom-out</property>
+                <signal name="clicked" handler="on_zoom_out_clicked"/>
               </object>
               <packing>
                 <property name="expand">False</property>
diff --git a/window_main.c b/window_main.c
index ff5200f..bd1de4f 100644
--- a/window_main.c
+++ b/window_main.c
@@ -27,6 +27,7 @@ gboolean layout_dragging = FALSE;
 gdouble layout_dragx, layout_dragy;
 
 enum zoom_mode_t zoom_mode = ZOOM_BESTFIT;
+gdouble zoom_factor = 1.0;
 
 GtkWindow *window;
 GtkImage *image = NULL;
@@ -186,8 +187,21 @@ static void set_image_pixbuf() {
 
 		set_image_pixbuf_resized(pb, win_width, win_height, width, height, ratio);
 		g_object_unref(pb);
-	} else if(zoom_mode == ZOOM_NORMAL || zoom_mode == ZOOM_CUSTOM) {
+	} else if(zoom_mode == ZOOM_NORMAL) {
 		set_image_pixbuf_normal(orig_pixbuf, win_width, win_height, gdk_pixbuf_get_width(orig_pixbuf), gdk_pixbuf_get_height(orig_pixbuf));
+	} else if(zoom_mode == ZOOM_CUSTOM) {
+		pb = zoom_pixbuf(orig_pixbuf, zoom_factor);
+		if(!pb)
+			return;
+
+		width = gdk_pixbuf_get_width(pb);
+		height = gdk_pixbuf_get_height(pb);
+
+		set_image_pixbuf_normal(pb, win_width, win_height, width, height);
+
+		set_resize_msg(zoom_factor);
+
+		g_object_unref(pb);
 	}
 }
 
@@ -921,6 +935,18 @@ void on_zoom_mode_toggled(GtkToggleToolButton *toolbutton, gpointer user_data) {
 	}
 }
 
+void on_zoom_in_clicked(GtkToolButton *toolbutton, gpointer user_data) {
+	zoom_mode = ZOOM_CUSTOM;
+	zoom_factor *= 1.25;
+	set_image_pixbuf();
+}
+
+void on_zoom_out_clicked(GtkToolButton *toolbutton, gpointer user_data) {
+	zoom_mode = ZOOM_CUSTOM;
+	zoom_factor *= .80;
+	set_image_pixbuf();
+}
+
 gboolean on_layout_button_press_event(GtkWindow *widget, GdkEventButton *event, gpointer user_data) {
 	GtkAdjustment *hadj, *vadj;
 
-- 
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