/usr/share/gtk-3.0/demo/colorsel.c is in gtk-3-examples 3.4.2-0ubuntu0.9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 | /* Color Selector
*
* GtkColorSelection lets the user choose a color. GtkColorSelectionDialog is
* a prebuilt dialog containing a GtkColorSelection.
*
*/
#include <gtk/gtk.h>
static GtkWidget *window = NULL;
static GtkWidget *da;
static GdkRGBA color;
static GtkWidget *frame;
/* draw callback for the drawing area
*/
static gboolean
draw_callback (GtkWidget *widget,
cairo_t *cr,
gpointer data)
{
GtkStyleContext *context;
GdkRGBA rgba;
context = gtk_widget_get_style_context (widget);
gtk_style_context_get_background_color (context, GTK_STATE_FLAG_NORMAL, &rgba);
gdk_cairo_set_source_rgba (cr, &rgba);
cairo_paint (cr);
return TRUE;
}
static void
response_cb (GtkDialog *dialog,
gint response_id,
gpointer user_data)
{
if (response_id == GTK_RESPONSE_OK)
{
gtk_color_chooser_get_rgba (GTK_COLOR_CHOOSER (dialog), &color);
gtk_widget_override_background_color (da, 0, &color);
}
gtk_widget_hide (GTK_WIDGET (dialog));
}
static void
change_color_callback (GtkWidget *button,
gpointer data)
{
GtkWidget *dialog;
dialog = gtk_color_chooser_dialog_new ("Changing color", GTK_WINDOW (window));
gtk_color_chooser_set_rgba (GTK_COLOR_CHOOSER (dialog), &color);
g_signal_connect (dialog,
"response",
G_CALLBACK (response_cb),
NULL);
gtk_widget_show_all (dialog);
}
GtkWidget *
do_colorsel (GtkWidget *do_widget)
{
GtkWidget *vbox;
GtkWidget *button;
if (!window)
{
color.red = 0;
color.blue = 1;
color.green = 0;
color.alpha = 1;
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), "Color Selection");
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
gtk_container_set_border_width (GTK_CONTAINER (window), 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);
/*
* Create the color swatch area
*/
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
da = gtk_drawing_area_new ();
g_signal_connect (da, "draw", G_CALLBACK (draw_callback), NULL);
/* set a minimum size */
gtk_widget_set_size_request (da, 200, 200);
/* set the color */
gtk_widget_override_background_color (da, 0, &color);
gtk_container_add (GTK_CONTAINER (frame), da);
button = gtk_button_new_with_mnemonic ("_Change the above color");
gtk_widget_set_halign (button, GTK_ALIGN_END);
gtk_widget_set_valign (button, GTK_ALIGN_CENTER);
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
g_signal_connect (button, "clicked",
G_CALLBACK (change_color_callback), NULL);
}
if (!gtk_widget_get_visible (window))
{
gtk_widget_show_all (window);
}
else
{
gtk_widget_destroy (window);
window = NULL;
}
return window;
}
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