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gtk-demo: Remove deprecations from dnd

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Make the dnd demo use global style providers.
This commit is contained in:
Matthias Clasen 2022-10-21 14:16:38 -04:00
parent 86f7c19b91
commit 230212c59c
1 changed files with 41 additions and 28 deletions
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69
demos/gtk-demo/dnd.c
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@ -11,7 +11,6 @@
#include <gtk/gtk.h>
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
G_DECLARE_FINAL_TYPE (CanvasItem, canvas_item, CANVAS, ITEM, GtkWidget)
@ -26,6 +25,9 @@ struct _CanvasItem {
double delta;
GtkWidget *editor;
GtkStyleProvider *provider;
char *css_class;
};
struct _CanvasItemClass {
@ -36,32 +38,41 @@ G_DEFINE_TYPE (CanvasItem, canvas_item, GTK_TYPE_WIDGET)
static int n_items = 0;
static void
unstyle_item (CanvasItem *item)
{
if (item->provider)
{
gtk_style_context_remove_provider_for_display (gtk_widget_get_display (item->label), item->provider);
g_clear_object (&item->provider);
}
if (item->css_class)
{
gtk_widget_remove_css_class (item->label, item->css_class);
g_clear_pointer (&item->css_class, g_free);
}
}
static void
set_color (CanvasItem *item,
GdkRGBA *color)
{
char *css;
char *str;
GtkStyleContext *context;
GtkCssProvider *provider;
const char *old_class;
const char *name;
unstyle_item (item);
str = gdk_rgba_to_string (color);
css = g_strdup_printf ("* { background: %s; }", str);
context = gtk_widget_get_style_context (item->label);
provider = g_object_get_data (G_OBJECT (context), "style-provider");
if (provider)
gtk_style_context_remove_provider (context, GTK_STYLE_PROVIDER (provider));
old_class = (const char *)g_object_get_data (G_OBJECT (item->label), "css-class");
if (old_class)
gtk_widget_remove_css_class (item->label, old_class);
name = gtk_widget_get_name (item->label);
css = g_strdup_printf ("#%s { background: %s; }", name, str);
provider = gtk_css_provider_new ();
gtk_css_provider_load_from_data (provider, css, -1);
gtk_style_context_add_provider (gtk_widget_get_style_context (item->label), GTK_STYLE_PROVIDER (provider), 800);
g_object_set_data_full (G_OBJECT (context), "style-provider", provider, g_object_unref);
gtk_style_context_add_provider_for_display (gtk_widget_get_display (item->label), GTK_STYLE_PROVIDER (provider), 700);
item->provider = GTK_STYLE_PROVIDER (provider);
g_free (str);
g_free (css);
@ -71,21 +82,10 @@ static void
set_css (CanvasItem *item,
const char *class)
{
GtkStyleContext *context;
GtkCssProvider *provider;
const char *old_class;
unstyle_item (item);
context = gtk_widget_get_style_context (item->label);
provider = g_object_get_data (G_OBJECT (context), "style-provider");
if (provider)
gtk_style_context_remove_provider (context, GTK_STYLE_PROVIDER (provider));
old_class = (const char *)g_object_get_data (G_OBJECT (item->label), "css-class");
if (old_class)
gtk_widget_remove_css_class (item->label, old_class);
g_object_set_data_full (G_OBJECT (item->label), "css-class", g_strdup (class), g_free);
gtk_widget_add_css_class (item->label, class);
item->css_class = g_strdup (class);
}
static gboolean
@ -724,6 +724,7 @@ do_dnd (GtkWidget *do_widget)
int i;
int x, y;
GtkCssProvider *provider;
GString *css;
button = gtk_color_button_new ();
g_object_unref (g_object_ref_sink (button));
@ -735,6 +736,18 @@ do_dnd (GtkWidget *do_widget)
800);
g_object_unref (provider);
css = g_string_new ("");
for (i = 0; colors[i]; i++)
g_string_append_printf (css, ".canvasitem.%s { background: %s; }\n", colors[i], colors[i]);
provider = gtk_css_provider_new ();
gtk_css_provider_load_from_data (provider, css->str, css->len);
gtk_style_context_add_provider_for_display (gdk_display_get_default (),
GTK_STYLE_PROVIDER (provider),
800);
g_object_unref (provider);
g_string_free (css, TRUE);
window = gtk_window_new ();
gtk_window_set_display (GTK_WINDOW (window),
gtk_widget_get_display (do_widget));