+++ /dev/null
-#include <gtk/gtk.h>
-
-static GdkContentProvider *
-prepare (GtkDragSource *source, double x, double y)
-{
- GtkWidget *canvas;
- GtkWidget *item;
-
- canvas = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (source));
- item = gtk_widget_pick (canvas, x, y, GTK_PICK_DEFAULT);
-
- if (!GTK_IS_LABEL (item))
- return NULL;
-
- g_object_set_data (G_OBJECT (canvas), "dragged-item", item);
-
- return gdk_content_provider_new_typed (GTK_TYPE_WIDGET, item);
-}
-
-static void
-drag_begin (GtkDragSource *source, GdkDrag *drag)
-{
- GtkWidget *canvas;
- GtkWidget *item;
-
- canvas = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (source));
- item = g_object_get_data (G_OBJECT (canvas), "dragged-item");
-
- gtk_widget_set_opacity (item, 0.5);
-}
-
-static void
-drag_end (GtkDragSource *source, GdkDrag *drag)
-{
- GtkWidget *canvas;
- GtkWidget *item;
-
- canvas = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (source));
- item = g_object_get_data (G_OBJECT (canvas), "dragged-item");
- g_object_set_data (G_OBJECT (canvas), "dragged-item", NULL);
-
- gtk_widget_set_opacity (item, 1.0);
-}
-
-static void
-drag_cancel (GtkDragSource *source,
- GdkDrag *drag,
- GdkDragCancelReason reason)
-{
- drag_end (source, drag);
-}
-
-typedef struct {
- double x, y;
- double angle;
- double delta;
-} TransformData;
-
-static void
-apply_transform (GtkWidget *item)
-{
- GtkWidget *canvas = gtk_widget_get_parent (item);
- TransformData *data;
- GskTransform *transform;
-
- data = g_object_get_data (G_OBJECT (item), "transform-data");
- transform = gsk_transform_rotate (gsk_transform_translate (NULL, &(graphene_point_t){data->x, data->y}),
- data->angle + data->delta);
- gtk_fixed_set_child_transform (GTK_FIXED (canvas), item, transform);
- gsk_transform_unref (transform);
-}
-
-static gboolean
-drag_drop (GtkDropTarget *target,
- const GValue *value,
- double x,
- double y)
-{
- GtkWidget *item;
- TransformData *transform_data;
- GtkWidget *canvas;
- GtkWidget *last_child;
-
- item = g_value_get_object (value);
- transform_data = g_object_get_data (G_OBJECT (item), "transform-data");
-
- transform_data->x = x;
- transform_data->y = y;
-
- canvas = gtk_widget_get_parent (item);
- last_child = gtk_widget_get_last_child (canvas);
- if (item != last_child)
- gtk_widget_insert_after (item, canvas, last_child);
-
- apply_transform (item);
-
- return TRUE;
-}
-
-static GtkWidget *
-canvas_new (void)
-{
- GtkWidget *canvas;
- GtkDragSource *source;
- GtkDropTarget *dest;
-
- canvas = gtk_fixed_new ();
- gtk_widget_set_hexpand (canvas, TRUE);
- gtk_widget_set_vexpand (canvas, TRUE);
- gtk_widget_add_css_class (canvas, "frame");
-
- source = gtk_drag_source_new ();
- gtk_drag_source_set_actions (source, GDK_ACTION_MOVE);
- g_signal_connect (source, "prepare", G_CALLBACK (prepare), NULL);
- g_signal_connect (source, "drag-begin", G_CALLBACK (drag_begin), NULL);
- g_signal_connect (source, "drag-end", G_CALLBACK (drag_end), NULL);
- g_signal_connect (source, "drag-cancel", G_CALLBACK (drag_cancel), NULL);
- gtk_widget_add_controller (canvas, GTK_EVENT_CONTROLLER (source));
-
- dest = gtk_drop_target_new (GTK_TYPE_WIDGET, GDK_ACTION_MOVE);
- g_signal_connect (dest, "drop", G_CALLBACK (drag_drop), NULL);
- gtk_widget_add_controller (canvas, GTK_EVENT_CONTROLLER (dest));
-
- return canvas;
-}
-
-static void
-set_color (GtkWidget *item,
- GdkRGBA *color)
-{
- char *css;
- char *str;
- GtkStyleContext *context;
- GtkCssProvider *provider;
-
- str = gdk_rgba_to_string (color);
- css = g_strdup_printf ("* { background: %s; padding: 10px; }", str);
-
- context = gtk_widget_get_style_context (item);
- provider = g_object_get_data (G_OBJECT (context), "style-provider");
- if (provider)
- gtk_style_context_remove_provider (context, GTK_STYLE_PROVIDER (provider));
-
- 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), GTK_STYLE_PROVIDER (provider), 800);
- g_object_set_data_full (G_OBJECT (context), "style-provider", provider, g_object_unref);
-
- g_free (str);
- g_free (css);
-}
-
-static gboolean
-item_drag_drop (GtkDropTarget *dest,
- const GValue *value,
- double x,
- double y)
-{
- GtkWidget *item = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (dest));
-
- set_color (item, g_value_get_boxed (value));
-
- return TRUE;
-}
-
-static void
-angle_changed (GtkGestureRotate *gesture,
- double angle,
- double delta)
-{
- GtkWidget *item = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture));
- TransformData *data = g_object_get_data (G_OBJECT (item), "transform-data");
-
- data->delta = angle / M_PI * 180.0;
-
- apply_transform (item);
-}
-
-static void
-rotate_done (GtkGesture *gesture)
-{
- GtkWidget *item = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture));
- TransformData *data = g_object_get_data (G_OBJECT (item), "transform-data");
-
- data->angle = data->angle + data->delta;
- data->delta = 0;
-}
-
-static void
-click_done (GtkGesture *gesture)
-{
- GtkWidget *item = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture));
- GtkWidget *canvas = gtk_widget_get_parent (item);
- GtkWidget *last_child;
-
- last_child = gtk_widget_get_last_child (canvas);
- if (item != last_child)
- gtk_widget_insert_after (item, canvas, last_child);
-}
-
-static GtkWidget *
-canvas_item_new (int i,
- double x,
- double y,
- double angle)
-{
- GtkWidget *widget;
- char *label;
- char *id;
- TransformData *transform_data;
- GdkRGBA rgba;
- GtkDropTarget *dest;
- GtkGesture *gesture;
-
- label = g_strdup_printf ("Item %d", i);
- id = g_strdup_printf ("item%d", i);
-
- gdk_rgba_parse (&rgba, "yellow");
-
- widget = gtk_label_new (label);
- gtk_widget_add_css_class (widget, "frame");
- gtk_widget_set_name (widget, id);
-
- set_color (widget, &rgba);
- transform_data = g_new0 (TransformData, 1);
- transform_data->x = x;
- transform_data->y = y;
- transform_data->angle = angle;
- g_object_set_data_full (G_OBJECT (widget), "transform-data", transform_data, g_free);
-
- g_free (label);
- g_free (id);
-
- dest = gtk_drop_target_new (GDK_TYPE_RGBA, GDK_ACTION_COPY);
- g_signal_connect (dest, "drop", G_CALLBACK (item_drag_drop), NULL);
- gtk_widget_add_controller (widget, GTK_EVENT_CONTROLLER (dest));
-
- gesture = gtk_gesture_rotate_new ();
- g_signal_connect (gesture, "angle-changed", G_CALLBACK (angle_changed), NULL);
- g_signal_connect (gesture, "end", G_CALLBACK (rotate_done), NULL);
- gtk_widget_add_controller (widget, GTK_EVENT_CONTROLLER (gesture));
-
- gesture = gtk_gesture_click_new ();
- g_signal_connect (gesture, "released", G_CALLBACK (click_done), NULL);
- gtk_widget_add_controller (widget, GTK_EVENT_CONTROLLER (gesture));
-
- return widget;
-}
-
-int main (int argc, char *argv[])
-{
- GtkWidget *window;
- GtkWidget *sw;
- GtkWidget *canvas;
- GtkWidget *widget;
- GtkWidget *box, *box2, *box3;
- const char *colors[] = {
- "red", "green", "blue", "magenta", "orange", "gray", "black", "yellow",
- "white", "gray", "brown", "pink", "cyan", "bisque", "gold", "maroon",
- "navy", "orchid", "olive", "peru", "salmon", "silver", "wheat",
- NULL
- };
- int i;
- int x, y;
-
- gtk_init ();
-
- widget = gtk_color_button_new ();
- g_object_unref (g_object_ref_sink (widget));
-
- window = gtk_window_new ();
- gtk_window_set_default_size (GTK_WINDOW (window), 640, 480);
-
- box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
- gtk_window_set_child (GTK_WINDOW (window), box);
-
- box2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
- gtk_box_append (GTK_BOX (box), box2);
-
- canvas = canvas_new ();
- gtk_box_append (GTK_BOX (box2), canvas);
-
- x = y = 40;
- for (i = 0; i < 4; i++)
- {
- GtkWidget *item;
-
- item = canvas_item_new (i, x, y, 0);
- gtk_box_append (GTK_BOX (canvas), item);
- apply_transform (item);
-
- x += 150;
- y += 100;
- }
-
- sw = gtk_scrolled_window_new (NULL, NULL);
- gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
- GTK_POLICY_AUTOMATIC,
- GTK_POLICY_NEVER);
- gtk_box_append (GTK_BOX (box), sw);
-
- box3 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
- gtk_widget_add_css_class (box3, "linked");
- gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), box3);
-
- for (i = 0; colors[i]; i++)
- {
- GdkRGBA rgba;
- GtkWidget *swatch;
-
- gdk_rgba_parse (&rgba, colors[i]);
-
- swatch = g_object_new (g_type_from_name ("GtkColorSwatch"),
- "rgba", &rgba,
- "selectable", FALSE,
- NULL);
- gtk_box_append (GTK_BOX (box3), swatch);
- }
-
- gtk_widget_show (window);
-
- while (TRUE)
- g_main_context_iteration (NULL, TRUE);
-
- return 0;
-}
projects / gtk4.git / commitdiff