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gtk3-demo: Add another overlay demo

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This commit is contained in:
Matthias Clasen 2015-07-28 22:47:07 -04:00
parent e51946270a
commit 763bf27d9c
6 changed files with 113 additions and 2 deletions
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1
demos/gtk-demo/Makefile.am
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@ -43,6 +43,7 @@ demos_base = \
offscreen_window.c \
offscreen_window2.c \
overlay.c \
overlay2.c \
panes.c \
pickers.c \
pixbufs.c \

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demos/gtk-demo/decor1.png Normal file
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demos/gtk-demo/decor2.png Normal file
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5
demos/gtk-demo/demo.gresource.xml
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@ -149,6 +149,7 @@
<file>offscreen_window.c</file>
<file>offscreen_window2.c</file>
<file>overlay.c</file>
<file>overlay2.c</file>
<file>pagesetup.c</file>
<file>panes.c</file>
<file>pickers.c</file>
@ -196,4 +197,8 @@
<gresource prefix="/filtermodel">
<file>filtermodel.ui</file>
</gresource>
<gresource prefix="/overlay2">
<file>decor1.png</file>
<file>decor2.png</file>
</gresource>
</gresources>

4
demos/gtk-demo/overlay.c
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@ -1,4 +1,4 @@
/* Overlay
/* Overlay/Interactive Overlay
*
* Shows widgets in static positions over a main widget.
*
@ -33,7 +33,7 @@ do_overlay (GtkWidget *do_widget)
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size (GTK_WINDOW (window), 500, 510);
gtk_window_set_title (GTK_WINDOW (window), "Overlay");
gtk_window_set_title (GTK_WINDOW (window), "Interactive Overlay");
overlay = gtk_overlay_new ();
grid = gtk_grid_new ();

105
demos/gtk-demo/overlay2.c Normal file
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@ -0,0 +1,105 @@
/* Overlay/Decorative Overlay
*
* Another example of an overlay with some decorative
* and some interactive controls.
*/
#include <gtk/gtk.h>
static GtkTextTag *tag;
static void
margin_changed (GtkAdjustment *adjustment,
GtkTextView *text)
{
gint value;
value = (gint)gtk_adjustment_get_value (adjustment);
gtk_text_view_set_left_margin (GTK_TEXT_VIEW (text), value);
g_object_set (tag, "pixels-above-lines", value, NULL);
}
GtkWidget *
do_overlay2 (GtkWidget *do_widget)
{
static GtkWidget *window = NULL;
if (!window)
{
GtkWidget *overlay;
GtkWidget *sw;
GtkWidget *text;
GtkWidget *image;
GtkWidget *scale;
GtkTextBuffer *buffer;
GtkTextIter start, end;
GtkAdjustment *adjustment;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size (GTK_WINDOW (window), 500, 510);
gtk_window_set_title (GTK_WINDOW (window), "Decorative Overlay");
overlay = gtk_overlay_new ();
sw = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
text = gtk_text_view_new ();
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
gtk_text_buffer_set_text (buffer, "Dear diary...", -1);
tag = gtk_text_buffer_create_tag (buffer, "top-margin",
"pixels-above-lines", 0,
NULL);
gtk_text_buffer_get_start_iter (buffer, &start);
end = start;
gtk_text_iter_forward_word_end (&end);
gtk_text_buffer_apply_tag (buffer, tag, &start, &end);
gtk_container_add (GTK_CONTAINER (window), overlay);
gtk_container_add (GTK_CONTAINER (overlay), sw);
gtk_container_add (GTK_CONTAINER (sw), text);
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
image = gtk_image_new_from_resource ("/overlay2/decor1.png");
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), image);
gtk_overlay_set_overlay_pass_through (GTK_OVERLAY (overlay), image, TRUE);
gtk_widget_set_halign (image, GTK_ALIGN_START);
gtk_widget_set_valign (image, GTK_ALIGN_START);
image = gtk_image_new_from_resource ("/overlay2/decor2.png");
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), image);
gtk_overlay_set_overlay_pass_through (GTK_OVERLAY (overlay), image, TRUE);
gtk_widget_set_halign (image, GTK_ALIGN_END);
gtk_widget_set_valign (image, GTK_ALIGN_END);
adjustment = gtk_adjustment_new (0, 0, 100, 1, 1, 0);
g_signal_connect (adjustment, "value-changed",
G_CALLBACK (margin_changed), text);
scale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, adjustment);
gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE);
gtk_widget_set_size_request (scale, 120, -1);
gtk_widget_set_margin_start (scale, 20);
gtk_widget_set_margin_end (scale, 20);
gtk_widget_set_margin_bottom (scale, 20);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), scale);
gtk_widget_set_halign (scale, GTK_ALIGN_START);
gtk_widget_set_valign (scale, GTK_ALIGN_END);
gtk_widget_set_tooltip_text (scale, "Margin");
gtk_adjustment_set_value (adjustment, 100);
gtk_widget_show_all (overlay);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show (window);
else
gtk_widget_destroy (window);
return window;
}