gtk-demo: Add animated pixbufs example
This commit is contained in:
Benjamin Otte
@ -18,6 +18,7 @@ demos = \
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css_accordion.c \
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css_basics.c \
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css_multiplebgs.c \
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css_pixbufs.c \
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dialog.c \
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drawingarea.c \
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editable_cells.c \
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@ -118,6 +119,7 @@ RESOURCES= application.ui \
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css_accordion.css \
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css_basics.css \
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css_multiplebgs.css \
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css_pixbufs.css \
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cssview.css \
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fancy.css \
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reset.css
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127
demos/gtk-demo/css_pixbufs.c
Normal file
127
demos/gtk-demo/css_pixbufs.c
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@ -0,0 +1,127 @@
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/* CSS Theming/Animated backgrounds
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*
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* This demo is done in honour of the Pixbufs demo further down. It is done exclusively
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* with CSS as the background of the window.
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*/
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#include <gtk/gtk.h>
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static GtkWidget *window = NULL;
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static void
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show_parsing_error (GtkCssProvider *provider,
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GtkCssSection *section,
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const GError *error,
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GtkTextBuffer *buffer)
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{
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GtkTextIter start, end;
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const char *tag_name;
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gtk_text_buffer_get_iter_at_line_index (buffer,
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&start,
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gtk_css_section_get_start_line (section),
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gtk_css_section_get_start_position (section));
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gtk_text_buffer_get_iter_at_line_index (buffer,
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&end,
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gtk_css_section_get_end_line (section),
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gtk_css_section_get_end_position (section));
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if (g_error_matches (error, GTK_CSS_PROVIDER_ERROR, GTK_CSS_PROVIDER_ERROR_DEPRECATED))
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tag_name = "warning";
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else
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tag_name = "error";
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gtk_text_buffer_apply_tag_by_name (buffer, tag_name, &start, &end);
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}
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static void
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css_text_changed (GtkTextBuffer *buffer,
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GtkCssProvider *provider)
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{
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GtkTextIter start, end;
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char *text;
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gtk_text_buffer_get_start_iter (buffer, &start);
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gtk_text_buffer_get_end_iter (buffer, &end);
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gtk_text_buffer_remove_all_tags (buffer, &start, &end);
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text = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
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gtk_css_provider_load_from_data (provider, text, -1, NULL);
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g_free (text);
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gtk_style_context_reset_widgets (gdk_screen_get_default ());
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}
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static void
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apply_css (GtkWidget *widget, GtkStyleProvider *provider)
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{
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gtk_style_context_add_provider (gtk_widget_get_style_context (widget), provider, G_MAXUINT);
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if (GTK_IS_CONTAINER (widget))
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gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback) apply_css, provider);
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}
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GtkWidget *
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do_css_pixbufs (GtkWidget *do_widget)
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{
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if (!window)
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{
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GtkWidget *paned, *container, *child;
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GtkStyleProvider *provider;
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GtkTextBuffer *text;
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GBytes *bytes;
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
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gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
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g_signal_connect (window, "destroy",
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G_CALLBACK (gtk_widget_destroyed), &window);
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paned = gtk_paned_new (GTK_ORIENTATION_VERTICAL);
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gtk_container_add (GTK_CONTAINER (window), paned);
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/* Need a filler so we get a handle */
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child = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
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gtk_container_add (GTK_CONTAINER (paned), child);
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text = gtk_text_buffer_new (NULL);
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gtk_text_buffer_create_tag (text,
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"warning",
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"underline", PANGO_UNDERLINE_SINGLE,
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NULL);
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gtk_text_buffer_create_tag (text,
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"error",
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"underline", PANGO_UNDERLINE_ERROR,
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NULL);
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provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());
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container = gtk_scrolled_window_new (NULL, NULL);
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gtk_container_add (GTK_CONTAINER (paned), container);
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child = gtk_text_view_new_with_buffer (text);
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gtk_container_add (GTK_CONTAINER (container), child);
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g_signal_connect (text,
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"changed",
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G_CALLBACK (css_text_changed),
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provider);
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bytes = g_resources_lookup_data ("/css_pixbufs/gtk.css", 0, NULL);
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gtk_text_buffer_set_text (text, g_bytes_get_data (bytes, NULL), g_bytes_get_size (bytes));
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g_signal_connect (provider,
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"parsing-error",
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G_CALLBACK (show_parsing_error),
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gtk_text_view_get_buffer (GTK_TEXT_VIEW (child)));
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apply_css (window, provider);
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}
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if (!gtk_widget_get_visible (window))
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gtk_widget_show_all (window);
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else
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{
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gtk_widget_destroy (window);
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window = NULL;
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}
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return window;
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}
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@ -64,3 +64,13 @@ GtkWindow {
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background-repeat: no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, repeat;
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animation: move-the-image infinite linear 3s, size-the-image infinite alternate ease-in-out 0.75s;
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}
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/* Make the text editor has a nice style */
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.view, .scrollbar, .pane-separator {
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color: black;
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background-color: rgba(255,255,255,0.5);
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}
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.view:selected {
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background-color: rgba(127,127,255,0.5);
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}
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@ -27,4 +27,16 @@
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<gresource prefix="/theming_style_classes">
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<file preprocess="xml-stripblanks">theming.ui</file>
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</gresource>
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<gresource prefix="/css_pixbufs">
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<file alias="gtk.css">css_pixbufs.css</file>
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<file>background.jpg</file>
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<file>apple-red.png</file>
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<file>gnome-applets.png</file>
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<file>gnome-calendar.png</file>
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<file>gnome-foot.png</file>
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<file>gnome-gmush.png</file>
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<file>gnome-gimp.png</file>
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<file>gnome-gsame.png</file>
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<file>gnu-keys.png</file>
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</gresource>
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</gresources>
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