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gtk-demo: Add filters to the zoom demo

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This commit is contained in:
Matthias Clasen
2023-02-07 19:21:51 -05:00
parent fb73acc885
commit d4dfbc1def
2 changed files with 54 additions and 2 deletions
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42
demos/gtk-demo/demo3widget.c
View File

@@ -4,6 +4,8 @@
enum
{
PROP_TEXTURE = 1,
PROP_MIN_FILTER,
PROP_MAG_FILTER,
PROP_SCALE
};
@@ -13,6 +15,8 @@ struct _Demo3Widget
GdkTexture *texture;
float scale;
GskScalingFilter min_filter;
GskScalingFilter mag_filter;
GtkWidget *menu;
};
@@ -28,6 +32,8 @@ static void
demo3_widget_init (Demo3Widget *self)
{
self->scale = 1.f;
self->min_filter = GSK_SCALING_FILTER_NEAREST;
self->mag_filter = GSK_SCALING_FILTER_NEAREST;
gtk_widget_init_template (GTK_WIDGET (self));
}
@@ -50,6 +56,7 @@ demo3_widget_snapshot (GtkWidget *widget,
Demo3Widget *self = DEMO3_WIDGET (widget);
int x, y, width, height;
double w, h;
GskRenderNode *node;
width = gtk_widget_get_width (widget);
height = gtk_widget_get_height (widget);
@@ -63,7 +70,12 @@ demo3_widget_snapshot (GtkWidget *widget,
gtk_snapshot_push_clip (snapshot, &GRAPHENE_RECT_INIT (0, 0, width, height));
gtk_snapshot_save (snapshot);
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (x, y));
gtk_snapshot_append_texture (snapshot, self->texture, &GRAPHENE_RECT_INIT (0, 0, w, h));
node = gsk_texture_node_new_with_filters (self->texture,
&GRAPHENE_RECT_INIT (0, 0, w, h),
self->min_filter,
self->mag_filter);
gtk_snapshot_append_node (snapshot, node);
gsk_render_node_unref (node);
gtk_snapshot_restore (snapshot);
gtk_snapshot_pop (snapshot);
}
@@ -124,6 +136,16 @@ demo3_widget_set_property (GObject *object,
gtk_widget_queue_resize (GTK_WIDGET (object));
break;
case PROP_MIN_FILTER:
self->min_filter = g_value_get_enum (value);
gtk_widget_queue_resize (GTK_WIDGET (object));
break;
case PROP_MAG_FILTER:
self->mag_filter = g_value_get_enum (value);
gtk_widget_queue_resize (GTK_WIDGET (object));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@@ -148,6 +170,14 @@ demo3_widget_get_property (GObject *object,
g_value_set_float (value, self->scale);
break;
case PROP_MIN_FILTER:
g_value_set_enum (value, self->min_filter);
break;
case PROP_MAG_FILTER:
g_value_set_enum (value, self->mag_filter);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@@ -215,6 +245,16 @@ demo3_widget_class_init (Demo3WidgetClass *class)
0.0, 10.0, 1.0,
G_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_MIN_FILTER,
g_param_spec_enum ("min-filter", NULL, NULL,
GSK_TYPE_SCALING_FILTER, GSK_SCALING_FILTER_LINEAR,
G_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_MAG_FILTER,
g_param_spec_enum ("mag-filter", NULL, NULL,
GSK_TYPE_SCALING_FILTER, GSK_SCALING_FILTER_LINEAR,
G_PARAM_READWRITE));
/* These are the actions that we are using in the menu */
gtk_widget_class_install_action (widget_class, "zoom.in", NULL, zoom_cb);
gtk_widget_class_install_action (widget_class, "zoom.out", NULL, zoom_cb);

14
demos/gtk-demo/menu.c
View File

@@ -22,9 +22,11 @@ do_menu (GtkWidget *do_widget)
if (!window)
{
GtkWidget *box;
GtkWidget *box2;
GtkWidget *sw;
GtkWidget *widget;
GtkWidget *scale;
GtkWidget *dropdown;
window = gtk_window_new ();
gtk_window_set_title (GTK_WINDOW (window), "Menu");
@@ -43,10 +45,20 @@ do_menu (GtkWidget *do_widget)
widget = demo3_widget_new ("/transparent/portland-rose.jpg");
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), widget);
box2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_box_append (GTK_BOX (box), box2);
scale = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL, 0.01, 10.0, 0.1);
gtk_range_set_value (GTK_RANGE (scale), 1.0);
gtk_box_append (GTK_BOX (box), scale);
gtk_widget_set_hexpand (scale, TRUE);
gtk_box_append (GTK_BOX (box2), scale);
dropdown = gtk_drop_down_new (G_LIST_MODEL (gtk_string_list_new ((const char *[]){ "Linear", "Nearest", "Trilinear", NULL })), NULL);
gtk_box_append (GTK_BOX (box2), dropdown);
g_object_bind_property (dropdown, "selected", widget, "min-filter", G_BINDING_DEFAULT);
g_object_bind_property (dropdown, "selected", widget, "mag-filter", G_BINDING_DEFAULT);
g_object_bind_property (gtk_range_get_adjustment (GTK_RANGE (scale)), "value",
widget, "scale",
G_BINDING_BIDIRECTIONAL);