*/
#include <gtk/gtk.h>
+#include <glib/gstdio.h>
#include <stdio.h>
#include <errno.h>
+#include "demo-common.h"
static GtkWidget *window = NULL;
static GdkPixbufLoader *pixbuf_loader = NULL;
GtkWidget *image;
image = GTK_WIDGET (data);
-
+
pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
/* Avoid displaying random memory contents, since the pixbuf
* isn't filled in yet.
*/
gdk_pixbuf_fill (pixbuf, 0xaaaaaaff);
-
+
gtk_image_set_from_pixbuf (GTK_IMAGE (image), pixbuf);
}
-static void progressive_updated_callback (GdkPixbufLoader *loader,
- gint x,
- gint y,
- gint width,
- gint height,
- gpointer data)
+static void
+progressive_updated_callback (GdkPixbufLoader *loader,
+ gint x,
+ gint y,
+ gint width,
+ gint height,
+ gpointer data)
{
GtkWidget *image;
-
+
image = GTK_WIDGET (data);
/* We know the pixbuf inside the GtkImage has changed, but the image
* the pixbuf on the display, then we could queue a draw for only
* the updated area of the image.
*/
-
+
gtk_widget_queue_draw (image);
}
GtkWidget *image;
image = GTK_WIDGET (data);
-
+
/* This shows off fully-paranoid error handling, so looks scary.
* You could factor out the error handling code into a nice separate
* function to make things nicer.
*/
-
+
if (image_stream)
{
size_t bytes_read;
guchar buf[256];
GError *error = NULL;
-
+
bytes_read = fread (buf, 1, 256, image_stream);
if (ferror (image_stream))
{
GtkWidget *dialog;
-
+
dialog = gtk_message_dialog_new (GTK_WINDOW (window),
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_ERROR,
image_stream = NULL;
gtk_widget_show (dialog);
-
+
load_timeout = 0;
return FALSE; /* uninstall the timeout */
&error))
{
GtkWidget *dialog;
-
+
dialog = gtk_message_dialog_new (GTK_WINDOW (window),
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_ERROR,
error->message);
g_error_free (error);
-
+
g_signal_connect (dialog, "response",
G_CALLBACK (gtk_widget_destroy), NULL);
fclose (image_stream);
image_stream = NULL;
-
+
gtk_widget_show (dialog);
load_timeout = 0;
&error))
{
GtkWidget *dialog;
-
+
dialog = gtk_message_dialog_new (GTK_WINDOW (window),
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_ERROR,
GTK_BUTTONS_CLOSE,
"Failed to load image: %s",
error->message);
-
+
g_error_free (error);
-
+
g_signal_connect (dialog, "response",
G_CALLBACK (gtk_widget_destroy), NULL);
-
+
gtk_widget_show (dialog);
- g_object_unref (G_OBJECT (pixbuf_loader));
+ g_object_unref (pixbuf_loader);
pixbuf_loader = NULL;
-
+
load_timeout = 0;
-
+
return FALSE; /* uninstall the timeout */
}
-
- g_object_unref (G_OBJECT (pixbuf_loader));
+
+ g_object_unref (pixbuf_loader);
pixbuf_loader = NULL;
}
}
else
{
- const gchar *filename;
+ gchar *filename;
+ gchar *error_message = NULL;
+ GError *error = NULL;
- if (g_file_test ("./alphatest.png", G_FILE_TEST_EXISTS))
- filename = "./alphatest.png";
+ /* demo_find_file() looks in the current directory first,
+ * so you can run gtk-demo without installing GTK, then looks
+ * in the location where the file is installed.
+ */
+ filename = demo_find_file ("alphatest.png", &error);
+ if (error)
+ {
+ error_message = g_strdup (error->message);
+ g_error_free (error);
+ }
else
- filename = DEMOCODEDIR"/alphatest.png";
-
- image_stream = fopen (filename, "r");
+ {
+ image_stream = g_fopen (filename, "rb");
+ g_free (filename);
+
+ if (!image_stream)
+ error_message = g_strdup_printf ("Unable to open image file 'alphatest.png': %s",
+ g_strerror (errno));
+ }
if (image_stream == NULL)
{
GtkWidget *dialog;
-
+
dialog = gtk_message_dialog_new (GTK_WINDOW (window),
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_ERROR,
GTK_BUTTONS_CLOSE,
- "Unable to open image file 'alphatest.png': %s",
- g_strerror (errno));
+ "%s", error_message);
+ g_free (error_message);
g_signal_connect (dialog, "response",
G_CALLBACK (gtk_widget_destroy), NULL);
-
+
gtk_widget_show (dialog);
load_timeout = 0;
if (pixbuf_loader)
{
gdk_pixbuf_loader_close (pixbuf_loader, NULL);
- g_object_unref (G_OBJECT (pixbuf_loader));
+ g_object_unref (pixbuf_loader);
pixbuf_loader = NULL;
}
-
+
pixbuf_loader = gdk_pixbuf_loader_new ();
-
- g_signal_connect (G_OBJECT (pixbuf_loader), "area_prepared",
+
+ g_signal_connect (pixbuf_loader, "area-prepared",
G_CALLBACK (progressive_prepared_callback), image);
-
- g_signal_connect (G_OBJECT (pixbuf_loader), "area_updated",
+
+ g_signal_connect (pixbuf_loader, "area-updated",
G_CALLBACK (progressive_updated_callback), image);
}
* The timeout simply simulates a slow data source by inserting
* pauses in the reading process.
*/
- load_timeout = g_timeout_add (150,
+ load_timeout = gdk_threads_add_timeout (150,
progressive_timeout,
image);
}
static void
-cleanup_callback (GtkObject *object,
+cleanup_callback (GObject *object,
gpointer data)
{
if (load_timeout)
g_source_remove (load_timeout);
load_timeout = 0;
}
-
+
if (pixbuf_loader)
{
gdk_pixbuf_loader_close (pixbuf_loader, NULL);
- g_object_unref (G_OBJECT (pixbuf_loader));
+ g_object_unref (pixbuf_loader);
pixbuf_loader = NULL;
}
image_stream = NULL;
}
+static void
+toggle_sensitivity_callback (GtkWidget *togglebutton,
+ gpointer user_data)
+{
+ GtkContainer *container = user_data;
+ GList *list;
+ GList *tmp;
+
+ list = gtk_container_get_children (container);
+
+ tmp = list;
+ while (tmp != NULL)
+ {
+ /* don't disable our toggle */
+ if (GTK_WIDGET (tmp->data) != togglebutton)
+ gtk_widget_set_sensitive (GTK_WIDGET (tmp->data),
+ !gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (togglebutton)));
+
+ tmp = tmp->next;
+ }
+
+ g_list_free (list);
+}
+
+
GtkWidget *
-do_images (void)
+do_images (GtkWidget *do_widget)
{
GtkWidget *frame;
GtkWidget *vbox;
GtkWidget *image;
GtkWidget *label;
GtkWidget *align;
-
+ GtkWidget *button;
+ GdkPixbuf *pixbuf;
+ GIcon *gicon;
+ GError *error = NULL;
+ char *filename;
+
if (!window)
{
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+ gtk_window_set_screen (GTK_WINDOW (window),
+ gtk_widget_get_screen (do_widget));
gtk_window_set_title (GTK_WINDOW (window), "Images");
g_signal_connect (window, "destroy",
gtk_container_set_border_width (GTK_CONTAINER (window), 8);
- vbox = gtk_vbox_new (FALSE, 8);
+ vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 8);
gtk_container_add (GTK_CONTAINER (window), vbox);
gtk_label_set_markup (GTK_LABEL (label),
"<u>Image loaded from a file</u>");
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
-
+
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
/* The alignment keeps the frame from growing when users resize
gtk_container_add (GTK_CONTAINER (align), frame);
gtk_box_pack_start (GTK_BOX (vbox), align, FALSE, FALSE, 0);
- /* We look for the image in the current directory first,
- * so you can run gtk-demo without installing GTK
+ /* demo_find_file() looks in the current directory first,
+ * so you can run gtk-demo without installing GTK, then looks
+ * in the location where the file is installed.
*/
- if (g_file_test ("./gtk-logo-rgb.gif", G_FILE_TEST_EXISTS))
+ pixbuf = NULL;
+ filename = demo_find_file ("gtk-logo-rgb.gif", &error);
+ if (filename)
+ {
+ pixbuf = gdk_pixbuf_new_from_file (filename, &error);
+ g_free (filename);
+ }
+
+ if (error)
{
/* This code shows off error handling. You can just use
* gtk_image_new_from_file() instead if you don't want to report
* gtk_image_new_from_file(), a "missing image" icon will
* be displayed instead.
*/
- GdkPixbuf *pixbuf;
- GError *error = NULL;
-
- pixbuf = gdk_pixbuf_new_from_file ("./gtk-logo-rgb.gif",
- &error);
- if (error)
- {
- GtkWidget *dialog;
+ GtkWidget *dialog;
- dialog = gtk_message_dialog_new (GTK_WINDOW (window),
- GTK_DIALOG_DESTROY_WITH_PARENT,
- GTK_MESSAGE_ERROR,
- GTK_BUTTONS_CLOSE,
- "Unable to open image file 'gtk-logo-rgb.gif': %s",
- error->message);
- g_error_free (error);
-
- g_signal_connect (dialog, "response",
- G_CALLBACK (gtk_widget_destroy), NULL);
-
- gtk_widget_show (dialog);
- }
-
- image = gtk_image_new_from_pixbuf (pixbuf);
- }
- else
- {
- /* This is the simpler code, with no error handling.
- * Here we're loading the installed gtk-logo-rgb.gif instead
- * of the one in the current directory.
- */
- image = gtk_image_new_from_file (DEMOCODEDIR"/gtk-logo-rgb.gif");
+ dialog = gtk_message_dialog_new (GTK_WINDOW (window),
+ GTK_DIALOG_DESTROY_WITH_PARENT,
+ GTK_MESSAGE_ERROR,
+ GTK_BUTTONS_CLOSE,
+ "Unable to open image file 'gtk-logo-rgb.gif': %s",
+ error->message);
+ g_error_free (error);
+
+ g_signal_connect (dialog, "response",
+ G_CALLBACK (gtk_widget_destroy), NULL);
+
+ gtk_widget_show (dialog);
}
+ image = gtk_image_new_from_pixbuf (pixbuf);
+
gtk_container_add (GTK_CONTAINER (frame), image);
gtk_label_set_markup (GTK_LABEL (label),
"<u>Animation loaded from a file</u>");
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
-
+
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
/* The alignment keeps the frame from growing when users resize
gtk_container_add (GTK_CONTAINER (align), frame);
gtk_box_pack_start (GTK_BOX (vbox), align, FALSE, FALSE, 0);
- /* We look for the image in the current directory first,
- * so you can run gtk-demo without installing GTK
+ filename = demo_find_file ("floppybuddy.gif", NULL);
+ image = gtk_image_new_from_file (filename);
+ g_free (filename);
+
+ gtk_container_add (GTK_CONTAINER (frame), image);
+
+ /* Symbolic icon */
+
+ label = gtk_label_new (NULL);
+ gtk_label_set_markup (GTK_LABEL (label),
+ "<u>Symbolic themed icon</u>");
+ gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
+
+ frame = gtk_frame_new (NULL);
+ gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
+ /* The alignment keeps the frame from growing when users resize
+ * the window
*/
- if (g_file_test ("./floppybuddy.gif", G_FILE_TEST_EXISTS))
- image = gtk_image_new_from_file ("./floppybuddy.gif");
- else
- image = gtk_image_new_from_file (DEMOCODEDIR"/floppybuddy.gif");
+ align = gtk_alignment_new (0.5, 0.5, 0, 0);
+ gtk_container_add (GTK_CONTAINER (align), frame);
+ gtk_box_pack_start (GTK_BOX (vbox), align, FALSE, FALSE, 0);
+
+ gicon = g_themed_icon_new_with_default_fallbacks ("battery-critical-charging-symbolic");
+ image = gtk_image_new_from_gicon (gicon, GTK_ICON_SIZE_DIALOG);
gtk_container_add (GTK_CONTAINER (frame), image);
-
/* Progressive */
-
-
+
+
label = gtk_label_new (NULL);
gtk_label_set_markup (GTK_LABEL (label),
"<u>Progressive image loading</u>");
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
-
+
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
/* The alignment keeps the frame from growing when users resize
gtk_container_add (GTK_CONTAINER (frame), image);
start_progressive_loading (image);
+
+ /* Sensitivity control */
+ button = gtk_toggle_button_new_with_mnemonic ("_Insensitive");
+ gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
+
+ g_signal_connect (button, "toggled",
+ G_CALLBACK (toggle_sensitivity_callback),
+ vbox);
}
- if (!GTK_WIDGET_VISIBLE (window))
+ if (!gtk_widget_get_visible (window))
{
gtk_widget_show_all (window);
}
projects / ~andy / gtk / blobdiff