forked from AuroraMiddleware/gtk
Merge branch 'matthiasc/for-master' into 'master'
gtk-demo: Add another demo See merge request GNOME/gtk!2584
This commit is contained in:
commit
c6aff910ed
@ -181,6 +181,11 @@
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<file>fontify.h</file>
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<file>main.ui</file>
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</gresource>
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<gresource prefix="/menu">
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<file>demo3widget.c</file>
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<file>demo3widget.h</file>
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<file>demo3widget.ui</file>
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</gresource>
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<gresource prefix="/shortcuts">
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<file>shortcuts.ui</file>
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<file>shortcuts-builder.ui</file>
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@ -265,6 +270,7 @@
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<file>list_store.c</file>
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<file>main.c</file>
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<file>markup.c</file>
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<file>menu.c</file>
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<file>overlay.c</file>
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<file>overlay2.c</file>
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<file>paint.c</file>
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243
demos/gtk-demo/demo3widget.c
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243
demos/gtk-demo/demo3widget.c
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@ -0,0 +1,243 @@
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#include <math.h>
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#include "demo3widget.h"
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enum
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{
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PROP_PAINTABLE = 1,
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PROP_SCALE
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};
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struct _Demo3Widget
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{
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GtkWidget parent_instance;
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GdkPaintable *paintable;
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float scale;
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GtkWidget *menu;
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};
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struct _Demo3WidgetClass
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{
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GtkWidgetClass parent_class;
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};
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G_DEFINE_TYPE (Demo3Widget, demo3_widget, GTK_TYPE_WIDGET)
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static void
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demo3_widget_init (Demo3Widget *self)
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{
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self->scale = 1.f;
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gtk_widget_init_template (GTK_WIDGET (self));
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}
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static void
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demo3_widget_dispose (GObject *object)
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{
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Demo3Widget *self = DEMO3_WIDGET (object);
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g_clear_object (&self->paintable);
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g_clear_pointer (&self->menu, gtk_widget_unparent);
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G_OBJECT_CLASS (demo3_widget_parent_class)->dispose (object);
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}
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static void
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demo3_widget_snapshot (GtkWidget *widget,
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GtkSnapshot *snapshot)
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{
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Demo3Widget *self = DEMO3_WIDGET (widget);
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int x, y, width, height;
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double w, h;
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width = gtk_widget_get_width (widget);
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height = gtk_widget_get_height (widget);
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w = self->scale * gdk_paintable_get_intrinsic_width (self->paintable);
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h = self->scale * gdk_paintable_get_intrinsic_height (self->paintable);
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x = MAX (0, (width - ceil (w)) / 2);
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y = MAX (0, (height - ceil (h)) / 2);
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gtk_snapshot_push_clip (snapshot, &GRAPHENE_RECT_INIT (0, 0, width, height));
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gtk_snapshot_save (snapshot);
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gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (x, y));
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gdk_paintable_snapshot (self->paintable, snapshot, w, h);
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gtk_snapshot_restore (snapshot);
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gtk_snapshot_pop (snapshot);
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}
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static void
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demo3_widget_measure (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural,
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int *minimum_baseline,
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int *natural_baseline)
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{
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Demo3Widget *self = DEMO3_WIDGET (widget);
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int size;
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if (orientation == GTK_ORIENTATION_HORIZONTAL)
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size = gdk_paintable_get_intrinsic_width (self->paintable);
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else
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size = gdk_paintable_get_intrinsic_height (self->paintable);
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*minimum = *natural = self->scale * size;
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}
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static void
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demo3_widget_size_allocate (GtkWidget *widget,
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int width,
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int height,
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int baseline)
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{
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Demo3Widget *self = DEMO3_WIDGET (widget);
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/* Since we are not using a layout manager (who would do this
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* for us), we need to allocate a size for our menu by calling
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* gtk_native_check_resize().
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*/
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gtk_native_check_resize (GTK_NATIVE (self->menu));
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}
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static void
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demo3_widget_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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Demo3Widget *self = DEMO3_WIDGET (object);
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switch (prop_id)
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{
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case PROP_PAINTABLE:
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g_clear_object (&self->paintable);
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self->paintable = g_value_dup_object (value);
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gtk_widget_queue_resize (GTK_WIDGET (object));
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break;
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case PROP_SCALE:
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self->scale = g_value_get_float (value);
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gtk_widget_queue_resize (GTK_WIDGET (object));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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demo3_widget_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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Demo3Widget *self = DEMO3_WIDGET (object);
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switch (prop_id)
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{
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case PROP_PAINTABLE:
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g_value_set_object (value, self->paintable);
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break;
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case PROP_SCALE:
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g_value_set_float (value, self->scale);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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pressed_cb (GtkGestureClick *gesture,
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guint n_press,
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double x,
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double y,
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Demo3Widget *self)
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{
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/* We are placing our menu at the point where
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* the click happened, before popping it up.
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*/
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gtk_popover_set_pointing_to (GTK_POPOVER (self->menu),
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&(const GdkRectangle){ x, y, 1, 1 });
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gtk_popover_popup (GTK_POPOVER (self->menu));
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}
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static void
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zoom_cb (GtkWidget *widget,
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const char *action_name,
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GVariant *parameter)
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{
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Demo3Widget *self = DEMO3_WIDGET (widget);
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float scale;
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if (g_str_equal (action_name, "zoom.in"))
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scale = MIN (10, self->scale * M_SQRT2);
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else if (g_str_equal (action_name, "zoom.out"))
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scale = MAX (0.01, self->scale / M_SQRT2);
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else
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scale = 1.0;
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gtk_widget_action_set_enabled (widget, "zoom.in", scale < 10);
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gtk_widget_action_set_enabled (widget, "zoom.out", scale > 0.01);
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gtk_widget_action_set_enabled (widget, "zoom.reset", scale != 1);
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g_object_set (widget, "scale", scale, NULL);
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}
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static void
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demo3_widget_class_init (Demo3WidgetClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
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object_class->dispose = demo3_widget_dispose;
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object_class->set_property = demo3_widget_set_property;
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object_class->get_property = demo3_widget_get_property;
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widget_class->snapshot = demo3_widget_snapshot;
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widget_class->measure = demo3_widget_measure;
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widget_class->size_allocate = demo3_widget_size_allocate;
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g_object_class_install_property (object_class, PROP_PAINTABLE,
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g_param_spec_object ("paintable", "Paintable", "Paintable",
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GDK_TYPE_PAINTABLE,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_SCALE,
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g_param_spec_float ("scale", "Scale", "Scale",
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0.0, 10.0, 1.0,
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G_PARAM_READWRITE));
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/* These are the actions that we are using in the menu */
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gtk_widget_class_install_action (widget_class, "zoom.in", NULL, zoom_cb);
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gtk_widget_class_install_action (widget_class, "zoom.out", NULL, zoom_cb);
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gtk_widget_class_install_action (widget_class, "zoom.reset", NULL, zoom_cb);
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gtk_widget_class_set_template_from_resource (widget_class, "/menu/demo3widget.ui");
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gtk_widget_class_bind_template_child (widget_class, Demo3Widget, menu);
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gtk_widget_class_bind_template_callback (widget_class, pressed_cb);
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}
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GtkWidget *
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demo3_widget_new (const char *resource)
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{
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Demo3Widget *self;
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GdkPixbuf *pixbuf;
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GdkPaintable *paintable;
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pixbuf = gdk_pixbuf_new_from_resource (resource, NULL);
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paintable = GDK_PAINTABLE (gdk_texture_new_for_pixbuf (pixbuf));
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self = g_object_new (DEMO3_TYPE_WIDGET, "paintable", paintable, NULL);
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g_object_unref (pixbuf);
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g_object_unref (paintable);
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return GTK_WIDGET (self);
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}
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8
demos/gtk-demo/demo3widget.h
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8
demos/gtk-demo/demo3widget.h
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@ -0,0 +1,8 @@
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#pragma once
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#include <gtk/gtk.h>
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#define DEMO3_TYPE_WIDGET (demo3_widget_get_type ())
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G_DECLARE_FINAL_TYPE (Demo3Widget, demo3_widget, DEMO3, WIDGET, GtkWidget)
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GtkWidget * demo3_widget_new (const char *resource);
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30
demos/gtk-demo/demo3widget.ui
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30
demos/gtk-demo/demo3widget.ui
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<interface>
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<menu id="model">
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<item>
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<attribute name="label">Zoom Out</attribute>
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<attribute name="action">zoom.out</attribute>
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</item>
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<item>
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<attribute name="label">Zoom In</attribute>
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<attribute name="action">zoom.in</attribute>
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</item>
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<item>
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<attribute name="label">1∶1</attribute>
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<attribute name="action">zoom.reset</attribute>
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</item>
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</menu>
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<template class="Demo3Widget">
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<child>
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<object class="GtkPopoverMenu" id="menu">
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<property name="has-arrow">0</property>
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<property name="menu-model">model</property>
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</object>
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</child>
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<child>
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<object class="GtkGestureClick">
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<property name="button">3</property>
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<signal name="pressed" handler="pressed_cb"/>
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</object>
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</child>
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</template>
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</interface>
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47
demos/gtk-demo/menu.c
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47
demos/gtk-demo/menu.c
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/* Menu
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* #Keywords: action, zoom
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*
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* Demonstrates how to add a context menu to a custom widget
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* and connect it with widget actions.
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*
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* The custom widget we create here is similar to a GtkPicture,
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* but allows setting a zoom level for the displayed paintable.
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*
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* Our context menu has items to change the zoom level.
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*/
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#include <gtk/gtk.h>
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#include "demo3widget.h"
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GtkWidget *
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do_menu (GtkWidget *do_widget)
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{
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static GtkWidget *window = NULL;
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if (!window)
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{
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GtkWidget *sw;
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GtkWidget *widget;
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window = gtk_window_new ();
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gtk_window_set_title (GTK_WINDOW (window), "Menu");
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gtk_window_set_default_size (GTK_WINDOW (window), 600, 400);
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gtk_window_set_display (GTK_WINDOW (window),
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gtk_widget_get_display (do_widget));
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g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
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sw = gtk_scrolled_window_new ();
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gtk_window_set_child (GTK_WINDOW (window), sw);
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widget = demo3_widget_new ("/transparent/portland-rose.jpg");
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gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), widget);
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}
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if (!gtk_widget_get_visible (window))
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gtk_widget_show (window);
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else
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gtk_window_destroy (GTK_WINDOW (window));
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return window;
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}
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@ -44,6 +44,7 @@ demos = files([
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'links.c',
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'listbox.c',
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'listbox2.c',
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'menu.c',
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'flowbox.c',
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'list_store.c',
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'listview_applauncher.c',
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@ -112,7 +113,8 @@ extra_demo_sources = files(['main.c',
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'demo2layout.c',
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'singular_value_decomposition.c',
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'four_point_transform.c',
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'demo2widget.c'])
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'demo2widget.c',
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'demo3widget.c'])
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if harfbuzz_dep.found() and pangoft_dep.found()
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demos += files('font_features.c')
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