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-rw-r--r--src/shell-workspace-background.c226
1 files changed, 226 insertions, 0 deletions
diff --git a/src/shell-workspace-background.c b/src/shell-workspace-background.c
new file mode 100644
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--- /dev/null
+++ b/src/shell-workspace-background.c
@@ -0,0 +1,226 @@
+#include "config.h"
+
+#include "shell-workspace-background.h"
+
+#include "shell-global.h"
+#include <meta/meta-workspace-manager.h>
+
+#define BACKGROUND_MARGIN 12
+
+enum
+{
+ PROP_0,
+
+ PROP_MONITOR_INDEX,
+ PROP_STATE_ADJUSTMENT_VALUE,
+
+ PROP_LAST
+};
+
+static GParamSpec *obj_props[PROP_LAST] = { NULL, };
+
+struct _ShellWorkspaceBackground
+{
+ /*< private >*/
+ StWidget parent_instance;
+
+ int monitor_index;
+ double state_adjustment_value;
+
+ MetaRectangle work_area;
+ MetaRectangle monitor_geometry;
+};
+
+G_DEFINE_TYPE (ShellWorkspaceBackground, shell_workspace_background, ST_TYPE_WIDGET);
+
+static void
+on_workareas_changed (ShellWorkspaceBackground *self)
+{
+ ShellGlobal *global = shell_global_get ();
+ MetaDisplay *display = shell_global_get_display (global);
+ MetaWorkspaceManager *workspace_manager = shell_global_get_workspace_manager (global);
+ MetaWorkspace *workspace =
+ meta_workspace_manager_get_workspace_by_index (workspace_manager, 0);
+
+ meta_workspace_get_work_area_for_monitor (workspace,
+ self->monitor_index,
+ &self->work_area);
+
+ meta_display_get_monitor_geometry (display,
+ self->monitor_index,
+ &self->monitor_geometry);
+}
+
+static void
+shell_workspace_background_allocate (ClutterActor *actor,
+ const ClutterActorBox *box)
+{
+ ShellWorkspaceBackground *self = SHELL_WORKSPACE_BACKGROUND (actor);
+ ShellGlobal *global = shell_global_get ();
+ ClutterStage *stage = shell_global_get_stage (global);
+ StThemeContext *context = st_theme_context_get_for_stage (stage);
+ StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor));
+ ClutterActorBox scaled_box, my_box, content_box;
+ ClutterActor *child;
+ float content_width, content_height;
+ float scaled_width, scaled_height;
+ float x_scale, y_scale;
+ float width, height;
+ int left_offset, right_offset;
+ int top_offset, bottom_offset;
+ int scale_factor;
+
+ scale_factor = st_theme_context_get_scale_factor (context);
+
+ clutter_actor_box_get_size (box, &width, &height);
+ scaled_height = height - BACKGROUND_MARGIN * 2 * scale_factor;
+ scaled_width = (scaled_height / height) * width;
+
+ scaled_box.x1 = box->x1 + (width - scaled_width) / 2;
+ scaled_box.y1 = box->y1 + (height - scaled_height) / 2;
+ clutter_actor_box_set_size (&scaled_box, scaled_width, scaled_height);
+
+ clutter_actor_box_interpolate(box, &scaled_box,
+ self->state_adjustment_value, &my_box);
+
+ clutter_actor_set_allocation (actor, &my_box);
+
+ st_theme_node_get_content_box (theme_node, &my_box, &content_box);
+
+ child = clutter_actor_get_first_child (actor);
+ clutter_actor_allocate (child, &content_box);
+
+ clutter_actor_box_get_size (&content_box, &content_width, &content_height);
+ x_scale = content_width / self->work_area.width;
+ y_scale = content_height / self->work_area.height;
+
+ left_offset = self->work_area.x - self->monitor_geometry.x;
+ top_offset = self->work_area.y - self->monitor_geometry.y;
+ right_offset = self->monitor_geometry.width - self->work_area.width - left_offset;
+ bottom_offset = self->monitor_geometry.height - self->work_area.height - top_offset;
+
+ clutter_actor_box_set_origin (&content_box,
+ -left_offset * x_scale,
+ -top_offset * y_scale);
+ clutter_actor_box_set_size (&content_box,
+ content_width + (left_offset + right_offset) * x_scale,
+ content_height + (top_offset + bottom_offset) * y_scale);
+
+ child = clutter_actor_get_first_child (child);
+ clutter_actor_allocate (child, &content_box);
+}
+
+static void
+shell_workspace_background_constructed (GObject *object)
+{
+ G_OBJECT_CLASS (shell_workspace_background_parent_class)->constructed (object);
+
+ on_workareas_changed (SHELL_WORKSPACE_BACKGROUND (object));
+}
+
+static void
+shell_workspace_background_get_property (GObject *gobject,
+ unsigned int property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ ShellWorkspaceBackground *self = SHELL_WORKSPACE_BACKGROUND (gobject);
+
+ switch (property_id)
+ {
+ case PROP_MONITOR_INDEX:
+ g_value_set_int (value, self->monitor_index);
+ break;
+
+ case PROP_STATE_ADJUSTMENT_VALUE:
+ g_value_set_double (value, self->state_adjustment_value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, property_id, pspec);
+ }
+}
+
+static void
+shell_workspace_background_set_property (GObject *gobject,
+ unsigned int property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ ShellWorkspaceBackground *self = SHELL_WORKSPACE_BACKGROUND (gobject);
+
+ switch (property_id)
+ {
+ case PROP_MONITOR_INDEX:
+ {
+ int new_value = g_value_get_int (value);
+ if (self->monitor_index != new_value)
+ {
+ self->monitor_index = new_value;
+ g_object_notify_by_pspec (gobject, obj_props[PROP_MONITOR_INDEX]);
+ }
+ }
+ break;
+
+ case PROP_STATE_ADJUSTMENT_VALUE:
+ {
+ double new_value = g_value_get_double (value);
+ if (self->state_adjustment_value != new_value)
+ {
+ self->state_adjustment_value = new_value;
+ g_object_notify_by_pspec (gobject, obj_props[PROP_STATE_ADJUSTMENT_VALUE]);
+ }
+ }
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, property_id, pspec);
+ }
+}
+
+static void
+shell_workspace_background_class_init (ShellWorkspaceBackgroundClass *klass)
+{
+ ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+ actor_class->allocate = shell_workspace_background_allocate;
+
+ gobject_class->constructed = shell_workspace_background_constructed;
+ gobject_class->get_property = shell_workspace_background_get_property;
+ gobject_class->set_property = shell_workspace_background_set_property;
+
+ /**
+ * ShellWorkspaceBackground:monitor-index:
+ */
+ obj_props[PROP_MONITOR_INDEX] =
+ g_param_spec_int ("monitor-index", "", "",
+ 0, G_MAXINT, 0,
+ G_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT_ONLY |
+ G_PARAM_STATIC_STRINGS |
+ G_PARAM_EXPLICIT_NOTIFY);
+
+ /**
+ * ShellWorkspaceBackground:state-adjustment-value:
+ */
+ obj_props[PROP_STATE_ADJUSTMENT_VALUE] =
+ g_param_spec_double ("state-adjustment-value", "", "",
+ -G_MAXDOUBLE, G_MAXDOUBLE, 0.0,
+ G_PARAM_READWRITE |
+ G_PARAM_STATIC_STRINGS |
+ G_PARAM_EXPLICIT_NOTIFY);
+
+ g_object_class_install_properties (gobject_class, PROP_LAST, obj_props);
+}
+
+static void
+shell_workspace_background_init (ShellWorkspaceBackground *self)
+{
+ ShellGlobal *global = shell_global_get ();
+ MetaDisplay *display = shell_global_get_display (global);
+
+ g_signal_connect_object (display, "workareas-changed",
+ G_CALLBACK (on_workareas_changed),
+ self, G_CONNECT_SWAPPED);
+}