[clutter/wip/expand-flags: 4/7] interactive/bin-layout: Improve the example code
- From: Emmanuele Bassi <ebassi src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [clutter/wip/expand-flags: 4/7] interactive/bin-layout: Improve the example code
- Date: Fri, 30 Mar 2012 10:19:09 +0000 (UTC)
commit cecade8d52a8aca70df8a53e9bb6d19260e2d1ba
Author: Emmanuele Bassi <ebassi linux intel com>
Date: Thu Mar 29 16:35:22 2012 +0100
interactive/bin-layout: Improve the example code
Use modern API; clean up the code, and document it so that it's possible
to XInclude it into the API reference.
tests/interactive/Makefile.am | 2 +-
tests/interactive/test-bin-layout.c | 236 ++++++++++++++++++++---------------
2 files changed, 135 insertions(+), 103 deletions(-)
---
diff --git a/tests/interactive/Makefile.am b/tests/interactive/Makefile.am
index 2c38e30..92b7921 100644
--- a/tests/interactive/Makefile.am
+++ b/tests/interactive/Makefile.am
@@ -40,7 +40,6 @@ UNIT_TESTS = \
test-cairo-clock.c \
test-cairo-flowers.c \
test-cogl-vertex-buffer.c \
- test-bin-layout.c \
test-flow-layout.c \
test-box-layout.c \
test-stage-sizing.c \
@@ -66,6 +65,7 @@ endif
if PIXBUF_TESTS
UNIT_TESTS += \
+ test-bin-layout.c \
test-image.c \
test-image-box.c
endif
diff --git a/tests/interactive/test-bin-layout.c b/tests/interactive/test-bin-layout.c
index 5614ef5..807d5f2 100644
--- a/tests/interactive/test-bin-layout.c
+++ b/tests/interactive/test-bin-layout.c
@@ -1,6 +1,7 @@
#include <stdlib.h>
#include <gmodule.h>
#include <cairo.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
#include <clutter/clutter.h>
static const ClutterColor bg_color = { 0xcc, 0xcc, 0xcc, 0x99 };
@@ -8,14 +9,20 @@ static const ClutterColor bg_color = { 0xcc, 0xcc, 0xcc, 0x99 };
static gboolean is_expanded = FALSE;
static gboolean
-draw_background (ClutterCairoTexture *texture,
- cairo_t *cr)
+on_canvas_draw (ClutterCanvas *canvas,
+ cairo_t *cr,
+ gint width,
+ gint height)
{
cairo_pattern_t *pat;
gfloat x, y;
- guint width, height;
- clutter_cairo_texture_get_surface_size (texture, &width, &height);
+ g_print (G_STRLOC ": Painting at %d x %d\n", width, height);
+
+ cairo_save (cr);
+ cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
+ cairo_paint (cr);
+ cairo_restore (cr);
#define BG_ROUND_RADIUS 12
@@ -74,8 +81,8 @@ on_box_enter (ClutterActor *box,
ClutterEvent *event,
ClutterActor *emblem)
{
+ /* we ease the opacity linearly */
clutter_actor_save_easing_state (emblem);
- clutter_actor_set_easing_duration (emblem, 150);
clutter_actor_set_easing_mode (emblem, CLUTTER_LINEAR);
clutter_actor_set_opacity (emblem, 255);
clutter_actor_restore_easing_state (emblem);
@@ -89,7 +96,6 @@ on_box_leave (ClutterActor *box,
ClutterActor *emblem)
{
clutter_actor_save_easing_state (emblem);
- clutter_actor_set_easing_duration (emblem, 150);
clutter_actor_set_easing_mode (emblem, CLUTTER_LINEAR);
clutter_actor_set_opacity (emblem, 0);
clutter_actor_restore_easing_state (emblem);
@@ -98,10 +104,11 @@ on_box_leave (ClutterActor *box,
}
static void
-on_rect_clicked (ClutterClickAction *action,
- ClutterActor *rect,
- ClutterActor *box)
+on_emblem_clicked (ClutterClickAction *action,
+ ClutterActor *emblem,
+ ClutterActor *box)
{
+ /* we add a little bounce to the resizing of the box */
clutter_actor_save_easing_state (box);
clutter_actor_set_easing_mode (box, CLUTTER_EASE_OUT_BOUNCE);
clutter_actor_set_easing_duration (box, 500);
@@ -117,10 +124,10 @@ on_rect_clicked (ClutterClickAction *action,
}
static gboolean
-on_rect_long_press (ClutterClickAction *action,
- ClutterActor *rect,
- ClutterLongPressState state,
- ClutterActor *box)
+on_emblem_long_press (ClutterClickAction *action,
+ ClutterActor *emblem,
+ ClutterLongPressState state,
+ ClutterActor *box)
{
switch (state)
{
@@ -141,137 +148,162 @@ on_rect_long_press (ClutterClickAction *action,
}
static void
-on_box_allocation_changed (ClutterActor *box,
- const ClutterActorBox *allocation,
- ClutterAllocationFlags flags,
- ClutterActor *background)
+redraw_canvas (ClutterActor *actor,
+ ClutterCanvas *canvas)
{
- gfloat new_width, new_height;
-
- clutter_actor_box_get_size (allocation, &new_width, &new_height);
- clutter_cairo_texture_set_surface_size (CLUTTER_CAIRO_TEXTURE (background),
- new_width,
- new_height);
- clutter_cairo_texture_invalidate (CLUTTER_CAIRO_TEXTURE (background));
+ /* we want to invalidate the canvas and redraw its contents
+ * only when the size changes at the end of the animation,
+ * to avoid drawing all the states inbetween
+ */
+ clutter_canvas_set_size (canvas,
+ clutter_actor_get_width (actor),
+ clutter_actor_get_height (actor));
}
G_MODULE_EXPORT int
test_bin_layout_main (int argc, char *argv[])
{
- ClutterActor *stage, *box, *rect;
+ ClutterActor *stage, *box, *bg, *icon, *emblem, *label;
ClutterLayoutManager *layout;
- ClutterColor stage_color = { 0xe0, 0xf2, 0xfc, 0xff };
+ ClutterContent *canvas, *image;
ClutterColor *color;
ClutterAction *action;
+ GdkPixbuf *pixbuf;
if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
return 1;
+ /* prepare the stage */
stage = clutter_stage_new ();
clutter_stage_set_title (CLUTTER_STAGE (stage), "BinLayout");
- clutter_actor_set_background_color (stage, &stage_color);
+ clutter_actor_set_background_color (stage, CLUTTER_COLOR_Aluminium2);
clutter_actor_set_size (stage, 640, 480);
+ clutter_actor_show (stage);
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
+ /* this is our BinLayout, with its default alignments */
layout = clutter_bin_layout_new (CLUTTER_BIN_ALIGNMENT_CENTER,
CLUTTER_BIN_ALIGNMENT_CENTER);
- box = clutter_box_new (layout);
- clutter_container_add_actor (CLUTTER_CONTAINER (stage), box);
+ /* the main container; this actor will use the BinLayout to lay
+ * out its children; we use the anchor point to keep it centered
+ * on the same position even when we change its size
+ */
+ box = clutter_actor_new ();
+ clutter_actor_set_layout_manager (box, layout);
clutter_actor_set_anchor_point_from_gravity (box, CLUTTER_GRAVITY_CENTER);
clutter_actor_set_position (box, 320, 240);
clutter_actor_set_reactive (box, TRUE);
clutter_actor_set_name (box, "box");
+ clutter_actor_add_child (stage, box);
+
+ /* the background is drawn using a canvas content */
+ canvas = clutter_canvas_new ();
+ g_signal_connect (canvas, "draw", G_CALLBACK (on_canvas_draw), NULL);
+ clutter_canvas_set_size (CLUTTER_CANVAS (canvas), 200, 200);
- /* the contents of the texture are created every time the allocation
- * of the box changes, to keep the background's size the same as the
- * box's size
+ /* this is the background actor; we want it to fill the whole
+ * of the allocation given to it by its parent
*/
- rect = clutter_cairo_texture_new (100, 100);
- g_signal_connect (rect, "draw", G_CALLBACK (draw_background), NULL);
-
- /* first method: use clutter_box_pack() */
- clutter_box_pack (CLUTTER_BOX (box), rect,
- "x-align", CLUTTER_BIN_ALIGNMENT_FILL,
- "y-align", CLUTTER_BIN_ALIGNMENT_FILL,
- NULL);
-
- clutter_actor_lower_bottom (rect);
- clutter_actor_set_name (rect, "background");
- g_signal_connect (box, "allocation-changed",
- G_CALLBACK (on_box_allocation_changed),
- rect);
-
- {
- ClutterActor *tex;
- GError *error;
- gchar *file;
-
- error = NULL;
- file = g_build_filename (TESTS_DATADIR, "redhand.png", NULL);
- tex = clutter_texture_new_from_file (file, &error);
- if (error)
- g_error ("Unable to create texture: %s", error->message);
-
- clutter_texture_set_keep_aspect_ratio (CLUTTER_TEXTURE (tex), TRUE);
-
- /* second method: use clutter_bin_layout_add() */
- clutter_bin_layout_add (CLUTTER_BIN_LAYOUT (layout), tex,
- CLUTTER_BIN_ALIGNMENT_CENTER,
- CLUTTER_BIN_ALIGNMENT_CENTER);
-
- clutter_actor_raise (tex, rect);
- clutter_actor_set_width (tex, 175);
- clutter_actor_set_name (tex, "texture");
-
- g_free (file);
- }
+ bg = clutter_actor_new ();
+ clutter_actor_set_name (bg, "background");
+ clutter_actor_set_size (bg, 200, 200);
+ clutter_actor_set_content (bg, canvas);
+ clutter_actor_set_x_expand (bg, TRUE);
+ clutter_actor_set_y_expand (bg, TRUE);
+ clutter_actor_set_x_align (bg, CLUTTER_ACTOR_ALIGN_FILL);
+ clutter_actor_set_y_align (bg, CLUTTER_ACTOR_ALIGN_FILL);
+ clutter_actor_add_child (box, bg);
+ /* we use the ::transitions-completed signal to get notification
+ * of the end of the sizing animation; this allows us to redraw
+ * the canvas only once the animation has stopped
+ */
+ g_signal_connect (box, "transitions-completed",
+ G_CALLBACK (redraw_canvas),
+ canvas);
+
+ /* we use GdkPixbuf to load an image from our data directory */
+ pixbuf = gdk_pixbuf_new_from_file (TESTS_DATADIR G_DIR_SEPARATOR_S "redhand.png", NULL);
+ image = clutter_image_new ();
+ clutter_image_set_data (CLUTTER_IMAGE (image),
+ gdk_pixbuf_get_pixels (pixbuf),
+ gdk_pixbuf_get_has_alpha (pixbuf)
+ ? COGL_PIXEL_FORMAT_RGBA_8888
+ : COGL_PIXEL_FORMAT_RGB_888,
+ gdk_pixbuf_get_width (pixbuf),
+ gdk_pixbuf_get_height (pixbuf),
+ gdk_pixbuf_get_rowstride (pixbuf),
+ NULL);
+ g_object_unref (pixbuf);
+
+ /* this is the icon; it's going to be centered inside the box actor.
+ * we use the content gravity to keep the aspect ratio of the image,
+ * and the scaling filters to get a better result when scaling the
+ * image down.
+ */
+ icon = clutter_actor_new ();
+ clutter_actor_set_name (icon, "icon");
+ clutter_actor_set_size (icon, 196, 196);
+ clutter_actor_set_x_expand (icon, TRUE);
+ clutter_actor_set_y_expand (icon, TRUE);
+ clutter_actor_set_x_align (icon, CLUTTER_ACTOR_ALIGN_CENTER);
+ clutter_actor_set_y_align (icon, CLUTTER_ACTOR_ALIGN_CENTER);
+ clutter_actor_set_content_gravity (icon, CLUTTER_CONTENT_GRAVITY_RESIZE_ASPECT);
+ clutter_actor_set_content_scaling_filters (icon,
+ CLUTTER_SCALING_FILTER_TRILINEAR,
+ CLUTTER_SCALING_FILTER_LINEAR);
+ clutter_actor_set_content (icon, image);
+ clutter_actor_add_child (box, icon);
color = clutter_color_new (g_random_int_range (0, 255),
g_random_int_range (0, 255),
g_random_int_range (0, 255),
224);
- rect = clutter_rectangle_new_with_color (color);
-
- /* third method: container_add() and set_alignment() */
- clutter_container_add_actor (CLUTTER_CONTAINER (box), rect);
- clutter_bin_layout_set_alignment (CLUTTER_BIN_LAYOUT (layout), rect,
- CLUTTER_BIN_ALIGNMENT_END,
- CLUTTER_BIN_ALIGNMENT_END);
-
- clutter_actor_set_size (rect, 50, 50);
- clutter_actor_set_opacity (rect, 0);
- clutter_actor_set_reactive (rect, TRUE);
- clutter_actor_raise_top (rect);
- clutter_actor_set_name (rect, "emblem");
+ /* this is the emblem: a small rectangle with a random color, that we
+ * want to put in the bottom right corner
+ */
+ emblem = clutter_actor_new ();
+ clutter_actor_set_name (emblem, "emblem");
+ clutter_actor_set_size (emblem, 48, 48);
+ clutter_actor_set_background_color (emblem, color);
+ clutter_actor_set_x_expand (emblem, TRUE);
+ clutter_actor_set_y_expand (emblem, TRUE);
+ clutter_actor_set_x_align (emblem, CLUTTER_ACTOR_ALIGN_END);
+ clutter_actor_set_y_align (emblem, CLUTTER_ACTOR_ALIGN_END);
+ clutter_actor_set_reactive (emblem, TRUE);
+ clutter_actor_set_opacity (emblem, 0);
+ clutter_actor_add_child (box, emblem);
+ clutter_color_free (color);
+ /* when clicking on the emblem, we want to perform an action */
action = clutter_click_action_new ();
- clutter_actor_add_action (rect, action);
- g_signal_connect (action, "clicked", G_CALLBACK (on_rect_clicked), box);
- g_signal_connect (action, "long-press", G_CALLBACK (on_rect_long_press), box);
+ clutter_actor_add_action (emblem, action);
+ g_signal_connect (action, "clicked", G_CALLBACK (on_emblem_clicked), box);
+ g_signal_connect (action, "long-press", G_CALLBACK (on_emblem_long_press), box);
+
+ /* whenever the pointer enters the box, we show the emblem; we hide
+ * the emblem when the pointer leaves the box
+ */
g_signal_connect (box,
"enter-event", G_CALLBACK (on_box_enter),
- rect);
+ emblem);
g_signal_connect (box,
"leave-event", G_CALLBACK (on_box_leave),
- rect);
-
- rect = clutter_text_new ();
- clutter_text_set_text (CLUTTER_TEXT (rect), "A simple test");
- clutter_container_add_actor (CLUTTER_CONTAINER (box), rect);
- clutter_bin_layout_set_alignment (CLUTTER_BIN_LAYOUT (layout), rect,
- CLUTTER_BIN_ALIGNMENT_CENTER,
- CLUTTER_BIN_ALIGNMENT_START);
- clutter_actor_raise_top (rect);
- clutter_actor_set_name (rect, "text");
-
- clutter_actor_show_all (stage);
+ emblem);
+
+ /* a label, that we want to position at the top and center of the box */
+ label = clutter_text_new ();
+ clutter_actor_set_name (label, "text");
+ clutter_text_set_text (CLUTTER_TEXT (label), "A simple test");
+ clutter_actor_set_x_expand (label, TRUE);
+ clutter_actor_set_x_align (label, CLUTTER_ACTOR_ALIGN_CENTER);
+ clutter_actor_set_y_expand (label, TRUE);
+ clutter_actor_set_y_align (label, CLUTTER_ACTOR_ALIGN_START);
+ clutter_actor_add_child (box, label);
clutter_main ();
- clutter_color_free (color);
-
return EXIT_SUCCESS;
}
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