Mercurial > cropper

changeset 13:13bc21684b8a

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added zooming with buttons
author meillo@marmaro.de
date Thu, 04 Mar 2010 17:05:38 +0100
parents 75a30c850ea0
children da18f2d4f92f
files callbacks.c callbacks.h interface.c main.h
diffstat 4 files changed, 53 insertions(+), 9 deletions(-) [+]
line wrap: on
line diff
--- a/callbacks.c	Thu Mar 04 14:23:30 2010 +0100
+++ b/callbacks.c	Thu Mar 04 17:05:38 2010 +0100
@@ -1,5 +1,6 @@
 #include <gtk/gtk.h>
 #include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gdk/gdkkeysyms.h>
 #include "main.h"
 #include "callbacks.h"
 #include "support.h"
@@ -7,6 +8,7 @@
 int image_width;
 int image_height;
 float inc = 0.3;
+float zoom = 1.0;
 
 
 /*
@@ -200,6 +202,14 @@
 */
 
 
+void
+update_title(char* zoom)
+{
+	char title[128];
+	snprintf(title, 128, "cropper (%s) %dx%d+%d+%d", zoom, w, h, x, y);
+	gtk_window_set_title(GTK_WINDOW(cropper_window), title);
+}
+
 
 /* zoom */
 void
@@ -208,31 +218,29 @@
 	static GdkPixbuf* pixbuf_new;
 	g_object_unref(pixbuf_new);
 
-	pixbuf_new = gdk_pixbuf_scale_simple(image_buffer, image_width, image_height, GDK_INTERP_BILINEAR);
+	pixbuf_new = gdk_pixbuf_scale_simple(image_buffer, image_width*zoom, image_height*zoom,
+	                                     GDK_INTERP_BILINEAR);
 	gtk_image_set_from_pixbuf((GtkImage*) lookup_widget(cropper_window, "image_area"), pixbuf_new);
 }
 
 void
 on_zoom_in_button_clicked(GtkObject* object, gpointer user_data)
 {
-	image_width *= 1 + inc;
-	image_height *= 1 + inc;
+	zoom *= 1 + inc;
 	set_zoom();
 }
 
 void
 on_zoom_out_button_clicked(GtkObject* object, gpointer user_data)
 {
-	image_width *= 1 - inc;
-	image_height *= 1 - inc;
+	zoom *= 1 - inc;
 	set_zoom();
 }
 
 void
 on_zoom_100_button_clicked(GtkObject* object, gpointer user_data)
 {
-	image_width = gdk_pixbuf_get_width(image_buffer);
-	image_height = gdk_pixbuf_get_height(image_buffer);
+	zoom = 1.0;
 	set_zoom();
 }
 
@@ -240,13 +248,16 @@
 on_zoom_fit_button_clicked(GtkObject* object, gpointer user_data)
 {
 	int w, h;
+	float zw, zh;
 	GtkWidget* image_a;
 
 	image_a = (GtkWidget*) lookup_widget(cropper_window, "image_area");
 	gdk_drawable_get_size(image_a->window, &w, &h);
 
-	image_width = w - 200;
-	image_height = h - 150;
+	zw = w*1.0 / image_width;
+	zh = h*1.0 / image_height;
+
+	zoom = (zw < zh) ? zw : zh;
 	set_zoom();
 }
 
@@ -306,3 +317,30 @@
 	gtk_main_quit();
 }
 
+
+
+
+gboolean
+on_key_press(GtkWidget* window, GdkEventKey* pKey, gpointer userdata)
+{
+	if (pKey->type != GDK_KEY_PRESS) {
+		return FALSE;
+	}
+	switch (pKey->keyval) {
+	case GDK_plus:
+		on_zoom_in_button_clicked(NULL, userdata);
+		break;
+	case GDK_minus:
+		on_zoom_out_button_clicked(NULL, userdata);
+		break;
+	case GDK_0:
+		on_zoom_100_button_clicked(NULL, userdata);
+		break;
+	case GDK_f:
+		on_zoom_fit_button_clicked(NULL, userdata);
+		break;
+	}
+	return TRUE;
+}
+
+
--- a/callbacks.h	Thu Mar 04 14:23:30 2010 +0100
+++ b/callbacks.h	Thu Mar 04 17:05:38 2010 +0100
@@ -34,4 +34,6 @@
 void on_zoom_100_button_clicked(GtkObject* object, gpointer user_data);
 void on_zoom_fit_button_clicked(GtkObject* object, gpointer user_data);
 
+gboolean on_key_press(GtkWidget* window, GdkEventKey* pKey, gpointer userdata);
+
 #endif
--- a/interface.c	Thu Mar 04 14:23:30 2010 +0100
+++ b/interface.c	Thu Mar 04 17:05:38 2010 +0100
@@ -526,6 +526,8 @@
 
 
 
+	g_signal_connect(cropper_window, "key-press-event", G_CALLBACK(on_key_press), NULL);
+
 
 
 
--- a/main.h	Thu Mar 04 14:23:30 2010 +0100
+++ b/main.h	Thu Mar 04 17:05:38 2010 +0100
@@ -11,4 +11,6 @@
 GtkWidget* image_area;
 GdkPixbuf* image_buffer;
 
+int w, h, x, y;
+
 #endif