diff options
| -rw-r--r-- | src/canvas-base.c | 807 | ||||
| -rw-r--r-- | src/ganv-private.h | 12 | ||||
| -rw-r--r-- | src/item.c | 785 |
3 files changed, 825 insertions, 779 deletions
diff --git a/src/canvas-base.c b/src/canvas-base.c index e30a517..89a3e4e 100644 --- a/src/canvas-base.c +++ b/src/canvas-base.c @@ -35,7 +35,6 @@ /* We must run our idle update handler *before* GDK wants to redraw. */ #define CANVAS_IDLE_PRIORITY (GDK_PRIORITY_REDRAW - 5) -static void ganv_canvas_base_request_update(GanvCanvasBase* canvas); static void add_idle(GanvCanvasBase* canvas); typedef struct { @@ -45,689 +44,6 @@ typedef struct { int height; } IRect; -/* Some convenience stuff */ -#define GCI_UPDATE_MASK (GANV_CANVAS_BASE_UPDATE_REQUESTED | GANV_CANVAS_BASE_UPDATE_AFFINE \ - | GANV_CANVAS_BASE_UPDATE_VISIBILITY) - -enum { - ITEM_PROP_0, - ITEM_PROP_PARENT, - ITEM_PROP_X, - ITEM_PROP_Y, - ITEM_PROP_MANAGED -}; - -enum { - ITEM_EVENT, - ITEM_LAST_SIGNAL -}; - -static int emit_event(GanvCanvasBase* canvas, GdkEvent* event); - -static guint item_signals[ITEM_LAST_SIGNAL]; - -G_DEFINE_TYPE(GanvItem, ganv_item, GTK_TYPE_OBJECT) - -static GtkObjectClass * item_parent_class; - -/* Object initialization function for GanvItem */ -static void -ganv_item_init(GanvItem* item) -{ - item->object.flags |= GANV_ITEM_VISIBLE; - item->managed = FALSE; -} - -/** - * ganv_item_new: - * @parent: The parent group for the new item. - * @type: The object type of the item. - * @first_arg_name: A list of object argument name/value pairs, NULL-terminated, - * used to configure the item. For example, "fill_color", "black", - * "width_units", 5.0, NULL. - * @Varargs: - * - * Creates a new canvas item with @parent as its parent group. The item is - * created at the top of its parent's stack, and starts up as visible. The item - * is of the specified @type, for example, it can be - * ganv_canvas_base_rect_get_type(). The list of object arguments/value pairs is - * used to configure the item. If you need to pass construct time parameters, you - * should use g_object_new() to pass the parameters and - * ganv_item_construct() to set up the canvas item. - * - * Return value: (transfer full): The newly-created item. - **/ -GanvItem* -ganv_item_new(GanvItem* parent, GType type, const gchar* first_arg_name, ...) -{ - GanvItem* item; - va_list args; - - g_return_val_if_fail(g_type_is_a(type, ganv_item_get_type()), NULL); - - item = GANV_ITEM(g_object_new(type, NULL)); - - va_start(args, first_arg_name); - ganv_item_construct(item, parent, first_arg_name, args); - va_end(args); - - return item; -} - -/* Performs post-creation operations on a canvas item (adding it to its parent - * group, etc.) - */ -static void -item_post_create_setup(GanvItem* item) -{ - GanvItemClass* parent_class = GANV_ITEM_GET_CLASS(item->parent); - if (!item->managed) { - if (parent_class->add) { - parent_class->add(item->parent, item); - } else { - g_warning("item added to non-parent item\n"); - } - } - ganv_canvas_base_request_redraw(item->canvas, - item->x1, item->y1, - item->x2 + 1, item->y2 + 1); - item->canvas->need_repick = TRUE; -} - -/* Set_property handler for canvas items */ -static void -ganv_item_set_property(GObject* gobject, guint param_id, - const GValue* value, GParamSpec* pspec) -{ - g_return_if_fail(GANV_IS_ITEM(gobject)); - - GanvItem* item = GANV_ITEM(gobject); - - switch (param_id) { - case ITEM_PROP_PARENT: - if (item->parent != NULL) { - g_warning("Cannot set `parent' argument after item has " - "already been constructed."); - } else if (g_value_get_object(value)) { - item->parent = GANV_ITEM(g_value_get_object(value)); - item->canvas = item->parent->canvas; - item_post_create_setup(item); - } - break; - case ITEM_PROP_X: - item->x = g_value_get_double(value); - ganv_item_request_update(item); - break; - case ITEM_PROP_Y: - item->y = g_value_get_double(value); - ganv_item_request_update(item); - break; - case ITEM_PROP_MANAGED: - item->managed = g_value_get_boolean(value); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID(gobject, param_id, pspec); - break; - } -} - -/* Get_property handler for canvas items */ -static void -ganv_item_get_property(GObject* gobject, guint param_id, - GValue* value, GParamSpec* pspec) -{ - g_return_if_fail(GANV_IS_ITEM(gobject)); - - GanvItem* item = GANV_ITEM(gobject); - - switch (param_id) { - case ITEM_PROP_PARENT: - g_value_set_object(value, item->parent); - break; - case ITEM_PROP_X: - g_value_set_double(value, item->x); - break; - case ITEM_PROP_Y: - g_value_set_double(value, item->y); - break; - case ITEM_PROP_MANAGED: - g_value_set_boolean(value, item->managed); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID(gobject, param_id, pspec); - break; - } -} - -/** - * ganv_item_construct: - * @item: An unconstructed canvas item. - * @parent: The parent group for the item. - * @first_arg_name: The name of the first argument for configuring the item. - * @args: The list of arguments used to configure the item. - * - * Constructs a canvas item; meant for use only by item implementations. - **/ -void -ganv_item_construct(GanvItem* item, GanvItem* parent, - const gchar* first_arg_name, va_list args) -{ - g_return_if_fail(GANV_IS_ITEM(item)); - - item->parent = parent; - item->canvas = item->parent->canvas; - item->layer = 0; - - g_object_set_valist(G_OBJECT(item), first_arg_name, args); - - item_post_create_setup(item); -} - -/* If the item is visible, requests a redraw of it. */ -static void -redraw_if_visible(GanvItem* item) -{ - if (item->object.flags & GANV_ITEM_VISIBLE) { - ganv_canvas_base_request_redraw(item->canvas, item->x1, item->y1, item->x2 + 1, - item->y2 + 1); - } -} - -/* Standard object dispose function for canvas items */ -static void -ganv_item_dispose(GObject* object) -{ - GanvItem* item; - - g_return_if_fail(GANV_IS_ITEM(object)); - - item = GANV_ITEM(object); - - if (item->canvas) { - redraw_if_visible(item); - } - - /* Make the canvas forget about us */ - - if (item->canvas && item == item->canvas->current_item) { - item->canvas->current_item = NULL; - item->canvas->need_repick = TRUE; - } - - if (item->canvas && item == item->canvas->new_current_item) { - item->canvas->new_current_item = NULL; - item->canvas->need_repick = TRUE; - } - - if (item->canvas && item == item->canvas->grabbed_item) { - item->canvas->grabbed_item = NULL; - gdk_pointer_ungrab(GDK_CURRENT_TIME); - } - - if (item->canvas && item == item->canvas->focused_item) { - item->canvas->focused_item = NULL; - } - - /* Normal destroy stuff */ - - if (item->object.flags & GANV_ITEM_MAPPED) { - (*GANV_ITEM_GET_CLASS(item)->unmap)(item); - } - - if (item->object.flags & GANV_ITEM_REALIZED) { - (*GANV_ITEM_GET_CLASS(item)->unrealize)(item); - } - - if (!item->managed && item->parent) { - if (GANV_ITEM_GET_CLASS(item->parent)->remove) { - GANV_ITEM_GET_CLASS(item->parent)->remove(item->parent, item); - } else { - fprintf(stderr, "warning: Item parent has no remove method\n"); - } - } - - G_OBJECT_CLASS(item_parent_class)->dispose(object); - /* items should remove any reference to item->canvas after the - first ::destroy */ - item->canvas = NULL; -} - -/* Realize handler for canvas items */ -static void -ganv_item_realize(GanvItem* item) -{ - GTK_OBJECT_SET_FLAGS(item, GANV_ITEM_REALIZED); - - ganv_item_request_update(item); -} - -/* Unrealize handler for canvas items */ -static void -ganv_item_unrealize(GanvItem* item) -{ - GTK_OBJECT_UNSET_FLAGS(item, GANV_ITEM_REALIZED); -} - -/* Map handler for canvas items */ -static void -ganv_item_map(GanvItem* item) -{ - GTK_OBJECT_SET_FLAGS(item, GANV_ITEM_MAPPED); -} - -/* Unmap handler for canvas items */ -static void -ganv_item_unmap(GanvItem* item) -{ - GTK_OBJECT_UNSET_FLAGS(item, GANV_ITEM_MAPPED); -} - -/* Update handler for canvas items */ -static void -ganv_item_update(GanvItem* item, int flags) -{ - GTK_OBJECT_UNSET_FLAGS(item, GANV_ITEM_NEED_UPDATE); - GTK_OBJECT_UNSET_FLAGS(item, GANV_ITEM_NEED_VIS); -} - -/* Point handler for canvas items */ -static double -ganv_item_point(GanvItem* item, - double x, double y, - int cx, int cy, - GanvItem** actual_item) -{ - *actual_item = NULL; - return G_MAXDOUBLE; -} - -void -ganv_item_invoke_update(GanvItem* item, int flags) -{ - int child_flags = flags; - - /* apply object flags to child flags */ - - child_flags &= ~GANV_CANVAS_BASE_UPDATE_REQUESTED; - - if (item->object.flags & GANV_ITEM_NEED_UPDATE) { - child_flags |= GANV_CANVAS_BASE_UPDATE_REQUESTED; - } - - if (item->object.flags & GANV_ITEM_NEED_VIS) { - child_flags |= GANV_CANVAS_BASE_UPDATE_VISIBILITY; - } - - if (child_flags & GCI_UPDATE_MASK) { - if (GANV_ITEM_GET_CLASS(item)->update) { - GANV_ITEM_GET_CLASS(item)->update(item, child_flags); - } - } -} - -/** - * ganv_item_set: - * @item: A canvas item. - * @first_arg_name: The list of object argument name/value pairs used to configure the item. - * @Varargs: - * - * Configures a canvas item. The arguments in the item are set to the specified - * values, and the item is repainted as appropriate. - **/ -void -ganv_item_set(GanvItem* item, const gchar* first_arg_name, ...) -{ - va_list args; - - va_start(args, first_arg_name); - ganv_item_set_valist(item, first_arg_name, args); - va_end(args); -} - -/** - * ganv_item_set_valist: - * @item: A canvas item. - * @first_arg_name: The name of the first argument used to configure the item. - * @args: The list of object argument name/value pairs used to configure the item. - * - * Configures a canvas item. The arguments in the item are set to the specified - * values, and the item is repainted as appropriate. - **/ -void -ganv_item_set_valist(GanvItem* item, const gchar* first_arg_name, va_list args) -{ - g_return_if_fail(GANV_IS_ITEM(item)); - - g_object_set_valist(G_OBJECT(item), first_arg_name, args); - - item->canvas->need_repick = TRUE; -} - -void -ganv_item_raise(GanvItem* item) -{ - ++item->layer; -} - -void -ganv_item_lower(GanvItem* item) -{ - --item->layer; -} - -/** - * ganv_item_move: - * @item: A canvas item. - * @dx: Horizontal offset. - * @dy: Vertical offset. - **/ -void -ganv_item_move(GanvItem* item, double dx, double dy) -{ - if (!item || !GANV_IS_ITEM(item)) { - return; - } - - item->x += dx; - item->y += dy; - - ganv_item_request_update(item); - item->canvas->need_repick = TRUE; -} - -/** - * ganv_item_show: - * @item: A canvas item. - * - * Shows a canvas item. If the item was already shown, then no action is taken. - **/ -void -ganv_item_show(GanvItem* item) -{ - g_return_if_fail(GANV_IS_ITEM(item)); - - if (!(item->object.flags & GANV_ITEM_VISIBLE)) { - item->object.flags |= GANV_ITEM_VISIBLE; - ganv_canvas_base_request_redraw(item->canvas, item->x1, item->y1, item->x2 + 1, - item->y2 + 1); - item->canvas->need_repick = TRUE; - } -} - -/** - * ganv_item_hide: - * @item: A canvas item. - * - * Hides a canvas item. If the item was already hidden, then no action is - * taken. - **/ -void -ganv_item_hide(GanvItem* item) -{ - g_return_if_fail(GANV_IS_ITEM(item)); - - if (item->object.flags & GANV_ITEM_VISIBLE) { - item->object.flags &= ~GANV_ITEM_VISIBLE; - ganv_canvas_base_request_redraw(item->canvas, item->x1, item->y1, item->x2 + 1, - item->y2 + 1); - item->canvas->need_repick = TRUE; - } -} - -/** - * ganv_item_grab: - * @item: A canvas item. - * @event_mask: Mask of events that will be sent to this item. - * @cursor: If non-NULL, the cursor that will be used while the grab is active. - * @etime: The timestamp required for grabbing the mouse, or GDK_CURRENT_TIME. - * - * Specifies that all events that match the specified event mask should be sent - * to the specified item, and also grabs the mouse by calling - * gdk_pointer_grab(). The event mask is also used when grabbing the pointer. - * If @cursor is not NULL, then that cursor is used while the grab is active. - * The @etime parameter is the timestamp required for grabbing the mouse. - * - * Return value: If an item was already grabbed, it returns %GDK_GRAB_ALREADY_GRABBED. If - * the specified item was hidden by calling ganv_item_hide(), then it - * returns %GDK_GRAB_NOT_VIEWABLE. Else, it returns the result of calling - * gdk_pointer_grab(). - **/ -int -ganv_item_grab(GanvItem* item, guint event_mask, GdkCursor* cursor, guint32 etime) -{ - int retval; - - g_return_val_if_fail(GANV_IS_ITEM(item), GDK_GRAB_NOT_VIEWABLE); - g_return_val_if_fail(GTK_WIDGET_MAPPED(item->canvas), GDK_GRAB_NOT_VIEWABLE); - - if (item->canvas->grabbed_item) { - return GDK_GRAB_ALREADY_GRABBED; - } - - if (!(item->object.flags & GANV_ITEM_VISIBLE)) { - return GDK_GRAB_NOT_VIEWABLE; - } - - retval = gdk_pointer_grab(item->canvas->layout.bin_window, - FALSE, - event_mask, - NULL, - cursor, - etime); - - if (retval != GDK_GRAB_SUCCESS) { - return retval; - } - - item->canvas->grabbed_item = item; - item->canvas->grabbed_event_mask = event_mask; - item->canvas->current_item = item; /* So that events go to the grabbed item */ - - return retval; -} - -/** - * ganv_item_ungrab: - * @item: A canvas item that holds a grab. - * @etime: The timestamp for ungrabbing the mouse. - * - * Ungrabs the item, which must have been grabbed in the canvas, and ungrabs the - * mouse. - **/ -void -ganv_item_ungrab(GanvItem* item, guint32 etime) -{ - g_return_if_fail(GANV_IS_ITEM(item)); - - if (item->canvas->grabbed_item != item) { - return; - } - - item->canvas->grabbed_item = NULL; - - gdk_pointer_ungrab(etime); -} - -void -ganv_item_i2w_offset(GanvItem* item, double* px, double* py) -{ - double x = 0.0; - double y = 0.0; - while (item) { - x += item->x; - y += item->y; - item = item->parent; - } - *px = x; - *py = y; -} - -/** - * ganv_item_i2w: - * @item: A canvas item. - * @x: X coordinate to convert (input/output value). - * @y: Y coordinate to convert (input/output value). - * - * Converts a coordinate pair from item-relative coordinates to world - * coordinates. - **/ -void -ganv_item_i2w(GanvItem* item, double* x, double* y) -{ - /*g_return_if_fail(GANV_IS_ITEM(item)); - g_return_if_fail(x != NULL); - g_return_if_fail(y != NULL);*/ - - double off_x; - double off_y; - ganv_item_i2w_offset(item, &off_x, &off_y); - - *x += off_x; - *y += off_y; -} - -void -ganv_item_i2w_pair(GanvItem* item, double* x1, double* y1, double* x2, double* y2) -{ - double off_x; - double off_y; - ganv_item_i2w_offset(item, &off_x, &off_y); - - *x1 += off_x; - *y1 += off_y; - *x2 += off_x; - *y2 += off_y; -} - -/** - * ganv_item_w2i: - * @item: A canvas item. - * @x: X coordinate to convert (input/output value). - * @y: Y coordinate to convert (input/output value). - * - * Converts a coordinate pair from world coordinates to item-relative - * coordinates. - **/ -void -ganv_item_w2i(GanvItem* item, double* x, double* y) -{ - double off_x; - double off_y; - ganv_item_i2w_offset(item, &off_x, &off_y); - - *x -= off_x; - *y -= off_y; -} - -/* Returns whether the item is an inferior of or is equal to the parent. */ -static gboolean -is_descendant(GanvItem* item, GanvItem* parent) -{ - for (; item; item = item->parent) { - if (item == parent) { - return TRUE; - } - } - - return FALSE; -} - -/** - * ganv_item_grab_focus: - * @item: A canvas item. - * - * Makes the specified item take the keyboard focus, so all keyboard events will - * be sent to it. If the canvas widget itself did not have the focus, it grabs - * it as well. - **/ -void -ganv_item_grab_focus(GanvItem* item) -{ - GanvItem* focused_item; - GdkEvent ev; - - g_return_if_fail(GANV_IS_ITEM(item)); - g_return_if_fail(GTK_WIDGET_CAN_FOCUS(GTK_WIDGET(item->canvas))); - - focused_item = item->canvas->focused_item; - - if (focused_item) { - ev.focus_change.type = GDK_FOCUS_CHANGE; - ev.focus_change.window = GTK_LAYOUT(item->canvas)->bin_window; - ev.focus_change.send_event = FALSE; - ev.focus_change.in = FALSE; - - emit_event(item->canvas, &ev); - } - - item->canvas->focused_item = item; - gtk_widget_grab_focus(GTK_WIDGET(item->canvas)); - - if (focused_item) { - ev.focus_change.type = GDK_FOCUS_CHANGE; - ev.focus_change.window = GTK_LAYOUT(item->canvas)->bin_window; - ev.focus_change.send_event = FALSE; - ev.focus_change.in = TRUE; - - emit_event(item->canvas, &ev); - } -} - -static void -ganv_item_default_bounds(GanvItem* item, double* x1, double* y1, double* x2, double* y2) -{ - *x1 = *y1 = *x2 = *y2 = 0.0; -} - -/** - * ganv_item_get_bounds: - * @item: A canvas item. - * @x1: Leftmost edge of the bounding box (return value). - * @y1: Upper edge of the bounding box (return value). - * @x2: Rightmost edge of the bounding box (return value). - * @y2: Lower edge of the bounding box (return value). - * - * Queries the bounding box of a canvas item. The bounds are returned in the - * coordinate system of the item's parent. - **/ -void -ganv_item_get_bounds(GanvItem* item, double* x1, double* y1, double* x2, double* y2) -{ - GANV_ITEM_GET_CLASS(item)->bounds(item, x1, y1, x2, y2); -} - -/** - * ganv_item_request_update: - * @item: A canvas item. - * - * To be used only by item implementations. Requests that the canvas queue an - * update for the specified item. - **/ -void -ganv_item_request_update(GanvItem* item) -{ - /* Note: At some point, if this short-circuit was enabled, the canvas stopped - updating items entirely when connected modules are removed. */ - if (item->object.flags & GANV_ITEM_NEED_UPDATE) { - return; - } - - if (!item->canvas) { - /* Item is being / has been destroyed, ignore */ - return; - } - - item->object.flags |= GANV_ITEM_NEED_UPDATE; - - if (item->parent != NULL) { - /* Recurse up the tree */ - ganv_item_request_update(item->parent); - } else { - /* Have reached the top of the tree, make sure the update call gets scheduled. */ - ganv_canvas_base_request_update(item->canvas); - } -} - /*** GanvCanvasBase ***/ static void ganv_canvas_base_destroy(GtkObject* object); @@ -1207,12 +523,25 @@ ganv_canvas_base_size_allocate(GtkWidget* widget, GtkAllocation* allocation) g_signal_emit_by_name(canvas->layout.vadjustment, "changed"); } +/* Returns whether the item is an inferior of or is equal to the parent. */ +static gboolean +is_descendant(GanvItem* item, GanvItem* parent) +{ + for (; item; item = item->parent) { + if (item == parent) { + return TRUE; + } + } + + return FALSE; +} + + /* Emits an event for an item in the canvas, be it the current item, grabbed * item, or focused item, as appropriate. */ - -static int -emit_event(GanvCanvasBase* canvas, GdkEvent* event) +int +ganv_canvas_base_emit_event(GanvCanvasBase* canvas, GdkEvent* event) { GdkEvent* ev; gint finished; @@ -1326,8 +655,7 @@ emit_event(GanvCanvasBase* canvas, GdkEvent* event) while (item && !finished) { g_object_ref(G_OBJECT(item)); - g_signal_emit(item, item_signals[ITEM_EVENT], 0, - ev, &finished); + ganv_item_emit_event(item, ev, &finished); parent = item->parent; g_object_unref(G_OBJECT(item)); @@ -1461,11 +789,11 @@ pick_current_item(GanvCanvasBase* canvas, GdkEvent* event) new_event.crossing.detail = GDK_NOTIFY_ANCESTOR; new_event.crossing.subwindow = NULL; canvas->in_repick = TRUE; - retval = emit_event(canvas, &new_event); + retval = ganv_canvas_base_emit_event(canvas, &new_event); canvas->in_repick = FALSE; } - /* new_current_item may have been set to NULL during the call to emit_event() above */ + /* new_current_item may have been set to NULL during the call to ganv_canvas_base_emit_event() above */ if ((canvas->new_current_item != canvas->current_item) && button_down) { canvas->left_grabbed_item = TRUE; @@ -1484,7 +812,7 @@ pick_current_item(GanvCanvasBase* canvas, GdkEvent* event) new_event.type = GDK_ENTER_NOTIFY; new_event.crossing.detail = GDK_NOTIFY_ANCESTOR; new_event.crossing.subwindow = NULL; - retval = emit_event(canvas, &new_event); + retval = ganv_canvas_base_emit_event(canvas, &new_event); } return retval; @@ -1543,7 +871,7 @@ ganv_canvas_base_button(GtkWidget* widget, GdkEventButton* event) canvas->state = event->state; pick_current_item(canvas, (GdkEvent*)event); canvas->state ^= mask; - retval = emit_event(canvas, (GdkEvent*)event); + retval = ganv_canvas_base_emit_event(canvas, (GdkEvent*)event); break; case GDK_BUTTON_RELEASE: @@ -1551,7 +879,7 @@ ganv_canvas_base_button(GtkWidget* widget, GdkEventButton* event) * after the button has been released */ canvas->state = event->state; - retval = emit_event(canvas, (GdkEvent*)event); + retval = ganv_canvas_base_emit_event(canvas, (GdkEvent*)event); event->state ^= mask; canvas->state = event->state; pick_current_item(canvas, (GdkEvent*)event); @@ -1582,7 +910,7 @@ ganv_canvas_base_motion(GtkWidget* widget, GdkEventMotion* event) canvas->state = event->state; pick_current_item(canvas, (GdkEvent*)event); - return emit_event(canvas, (GdkEvent*)event); + return ganv_canvas_base_emit_event(canvas, (GdkEvent*)event); } static gboolean @@ -1601,7 +929,7 @@ ganv_canvas_base_scroll(GtkWidget* widget, GdkEventScroll* event) canvas->state = event->state; pick_current_item(canvas, (GdkEvent*)event); - return emit_event(canvas, (GdkEvent*)event); + return ganv_canvas_base_emit_event(canvas, (GdkEvent*)event); } /* Key event handler for the canvas */ @@ -1615,7 +943,7 @@ ganv_canvas_base_key(GtkWidget* widget, GdkEventKey* event) canvas = GANV_CANVAS_BASE(widget); - if (!emit_event(canvas, (GdkEvent*)event)) { + if (!ganv_canvas_base_emit_event(canvas, (GdkEvent*)event)) { GtkWidgetClass* widget_class; widget_class = GTK_WIDGET_CLASS(canvas_parent_class); @@ -1668,7 +996,7 @@ ganv_canvas_base_focus_in(GtkWidget* widget, GdkEventFocus* event) canvas = GANV_CANVAS_BASE(widget); if (canvas->focused_item) { - return emit_event(canvas, (GdkEvent*)event); + return ganv_canvas_base_emit_event(canvas, (GdkEvent*)event); } else { return FALSE; } @@ -1685,7 +1013,7 @@ ganv_canvas_base_focus_out(GtkWidget* widget, GdkEventFocus* event) canvas = GANV_CANVAS_BASE(widget); if (canvas->focused_item) { - return emit_event(canvas, (GdkEvent*)event); + return ganv_canvas_base_emit_event(canvas, (GdkEvent*)event); } else { return FALSE; } @@ -2176,7 +1504,7 @@ ganv_canvas_base_get_item_at(GanvCanvasBase* canvas, double x, double y) } /* Queues an update of the canvas */ -static void +void ganv_canvas_base_request_update(GanvCanvasBase* canvas) { GANV_CANVAS_BASE_GET_CLASS(canvas)->request_update(canvas); @@ -2422,82 +1750,3 @@ ganv_canvas_base_world_to_window(GanvCanvasBase* canvas, double worldx, double w *winy = (canvas->pixels_per_unit) * (worldy - canvas->scroll_y1) + canvas->zoom_yofs; } } - -static gboolean -boolean_handled_accumulator(GSignalInvocationHint* ihint, - GValue* return_accu, - const GValue* handler_return, - gpointer dummy) -{ - gboolean continue_emission; - gboolean signal_handled; - - signal_handled = g_value_get_boolean(handler_return); - g_value_set_boolean(return_accu, signal_handled); - continue_emission = !signal_handled; - - return continue_emission; -} - -/* Class initialization function for GanvItemClass */ -static void -ganv_item_class_init(GanvItemClass* klass) -{ - GObjectClass* gobject_class; - - gobject_class = (GObjectClass*)klass; - - item_parent_class = (GtkObjectClass*)g_type_class_peek_parent(klass); - - gobject_class->set_property = ganv_item_set_property; - gobject_class->get_property = ganv_item_get_property; - - g_object_class_install_property - (gobject_class, ITEM_PROP_PARENT, - g_param_spec_object("parent", NULL, NULL, - GANV_TYPE_ITEM, - (G_PARAM_READABLE | G_PARAM_WRITABLE))); - - g_object_class_install_property - (gobject_class, ITEM_PROP_X, - g_param_spec_double("x", - _("X"), - _("X"), - -G_MAXDOUBLE, G_MAXDOUBLE, 0.0, - (G_PARAM_READABLE | G_PARAM_WRITABLE))); - g_object_class_install_property - (gobject_class, ITEM_PROP_Y, - g_param_spec_double("y", - _("Y"), - _("Y"), - -G_MAXDOUBLE, G_MAXDOUBLE, 0.0, - (G_PARAM_READABLE | G_PARAM_WRITABLE))); - - g_object_class_install_property - (gobject_class, ITEM_PROP_MANAGED, - g_param_spec_boolean("managed", - _("Managed"), - _("Whether the item is managed by its parent"), - 0, - (G_PARAM_READABLE | G_PARAM_WRITABLE))); - - item_signals[ITEM_EVENT] - = g_signal_new("event", - G_TYPE_FROM_CLASS(klass), - G_SIGNAL_RUN_LAST, - G_STRUCT_OFFSET(GanvItemClass, event), - boolean_handled_accumulator, NULL, - ganv_marshal_BOOLEAN__BOXED, - G_TYPE_BOOLEAN, 1, - GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE); - - gobject_class->dispose = ganv_item_dispose; - - klass->realize = ganv_item_realize; - klass->unrealize = ganv_item_unrealize; - klass->map = ganv_item_map; - klass->unmap = ganv_item_unmap; - klass->update = ganv_item_update; - klass->point = ganv_item_point; - klass->bounds = ganv_item_default_bounds; -} diff --git a/src/ganv-private.h b/src/ganv-private.h index 2a4dbe2..d70f00c 100644 --- a/src/ganv-private.h +++ b/src/ganv-private.h @@ -206,6 +206,18 @@ ganv_item_i2w_pair(GanvItem* item, double* x1, double* y1, double* x2, double* y void ganv_item_invoke_update(GanvItem* item, int flags); +void +ganv_item_emit_event(GanvItem* item, GdkEvent* event, gint* finished); + +/* CanvasBase */ + +void +ganv_canvas_base_request_update(GanvCanvasBase* canvas); + +int +ganv_canvas_base_emit_event(GanvCanvasBase* canvas, GdkEvent* event); + + /* Edge */ void diff --git a/src/item.c b/src/item.c new file mode 100644 index 0000000..6fcd110 --- /dev/null +++ b/src/item.c @@ -0,0 +1,785 @@ +/* This file is part of Ganv. + * Copyright 2007-2013 David Robillard <http://drobilla.net> + * + * Ganv is free software: you can redistribute it and/or modify it under the + * terms of the GNU General Public License as published by the Free Software + * Foundation, either version 3 of the License, or any later version. + * + * Ganv is distributed in the hope that it will be useful, but WITHOUT ANY + * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details. + * + * You should have received a copy of the GNU General Public License along + * with Ganv. If not, see <http://www.gnu.org/licenses/>. + */ + +/* Based on GnomeCanvas, by Federico Mena <federico@nuclecu.unam.mx> + * and Raph Levien <raph@gimp.org> + * Copyright 1997-2000 Free Software Foundation + */ + +#include "ganv/canvas.h" +#include "ganv/canvas-base.h" +#include "ganv/node.h" + +#include "./boilerplate.h" +#include "./ganv-marshal.h" +#include "./ganv-private.h" +#include "./gettext.h" + +#define GCI_UPDATE_MASK (GANV_CANVAS_BASE_UPDATE_REQUESTED \ + | GANV_CANVAS_BASE_UPDATE_AFFINE \ + | GANV_CANVAS_BASE_UPDATE_VISIBILITY) + +enum { + ITEM_PROP_0, + ITEM_PROP_PARENT, + ITEM_PROP_X, + ITEM_PROP_Y, + ITEM_PROP_MANAGED +}; + +enum { + ITEM_EVENT, + ITEM_LAST_SIGNAL +}; + +static guint item_signals[ITEM_LAST_SIGNAL]; + +G_DEFINE_TYPE(GanvItem, ganv_item, GTK_TYPE_OBJECT) + +static GtkObjectClass * item_parent_class; + +/* Object initialization function for GanvItem */ +static void +ganv_item_init(GanvItem* item) +{ + item->object.flags |= GANV_ITEM_VISIBLE; + item->managed = FALSE; +} + +/** + * ganv_item_new: + * @parent: The parent group for the new item. + * @type: The object type of the item. + * @first_arg_name: A list of object argument name/value pairs, NULL-terminated, + * used to configure the item. For example, "fill_color", "black", + * "width_units", 5.0, NULL. + * @Varargs: + * + * Creates a new canvas item with @parent as its parent group. The item is + * created at the top of its parent's stack, and starts up as visible. The item + * is of the specified @type, for example, it can be + * ganv_canvas_base_rect_get_type(). The list of object arguments/value pairs is + * used to configure the item. If you need to pass construct time parameters, you + * should use g_object_new() to pass the parameters and + * ganv_item_construct() to set up the canvas item. + * + * Return value: (transfer full): The newly-created item. + **/ +GanvItem* +ganv_item_new(GanvItem* parent, GType type, const gchar* first_arg_name, ...) +{ + GanvItem* item; + va_list args; + + g_return_val_if_fail(g_type_is_a(type, ganv_item_get_type()), NULL); + + item = GANV_ITEM(g_object_new(type, NULL)); + + va_start(args, first_arg_name); + ganv_item_construct(item, parent, first_arg_name, args); + va_end(args); + + return item; +} + +/* Performs post-creation operations on a canvas item (adding it to its parent + * group, etc.) + */ +static void +item_post_create_setup(GanvItem* item) +{ + GanvItemClass* parent_class = GANV_ITEM_GET_CLASS(item->parent); + if (!item->managed) { + if (parent_class->add) { + parent_class->add(item->parent, item); + } else { + g_warning("item added to non-parent item\n"); + } + } + ganv_canvas_base_request_redraw(item->canvas, + item->x1, item->y1, + item->x2 + 1, item->y2 + 1); + item->canvas->need_repick = TRUE; +} + +static void +ganv_item_set_property(GObject* object, + guint prop_id, + const GValue* value, + GParamSpec* pspec) +{ + g_return_if_fail(object != NULL); + g_return_if_fail(GANV_IS_ITEM(object)); + + GanvItem* item = GANV_ITEM(object); + + switch (prop_id) { + case ITEM_PROP_PARENT: + if (item->parent != NULL) { + g_warning("Cannot set `parent' argument after item has " + "already been constructed."); + } else if (g_value_get_object(value)) { + item->parent = GANV_ITEM(g_value_get_object(value)); + item->canvas = item->parent->canvas; + item_post_create_setup(item); + } + break; + case ITEM_PROP_X: + item->x = g_value_get_double(value); + ganv_item_request_update(item); + break; + case ITEM_PROP_Y: + item->y = g_value_get_double(value); + ganv_item_request_update(item); + break; + case ITEM_PROP_MANAGED: + item->managed = g_value_get_boolean(value); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec); + break; + } +} + +static void +ganv_item_get_property(GObject* object, + guint prop_id, + GValue* value, + GParamSpec* pspec) +{ + g_return_if_fail(object != NULL); + g_return_if_fail(GANV_IS_ITEM(object)); + + GanvItem* item = GANV_ITEM(object); + + switch (prop_id) { + case ITEM_PROP_PARENT: + g_value_set_object(value, item->parent); + break; + case ITEM_PROP_X: + g_value_set_double(value, item->x); + break; + case ITEM_PROP_Y: + g_value_set_double(value, item->y); + break; + case ITEM_PROP_MANAGED: + g_value_set_boolean(value, item->managed); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec); + break; + } +} + +/** + * ganv_item_construct: + * @item: An unconstructed canvas item. + * @parent: The parent group for the item. + * @first_arg_name: The name of the first argument for configuring the item. + * @args: The list of arguments used to configure the item. + * + * Constructs a canvas item; meant for use only by item implementations. + **/ +void +ganv_item_construct(GanvItem* item, GanvItem* parent, + const gchar* first_arg_name, va_list args) +{ + g_return_if_fail(GANV_IS_ITEM(item)); + + item->parent = parent; + item->canvas = item->parent->canvas; + item->layer = 0; + + g_object_set_valist(G_OBJECT(item), first_arg_name, args); + + item_post_create_setup(item); +} + +/* If the item is visible, requests a redraw of it. */ +static void +redraw_if_visible(GanvItem* item) +{ + if (item->object.flags & GANV_ITEM_VISIBLE) { + ganv_canvas_base_request_redraw(item->canvas, item->x1, item->y1, item->x2 + 1, + item->y2 + 1); + } +} + +/* Standard object dispose function for canvas items */ +static void +ganv_item_dispose(GObject* object) +{ + GanvItem* item; + + g_return_if_fail(GANV_IS_ITEM(object)); + + item = GANV_ITEM(object); + + if (item->canvas) { + redraw_if_visible(item); + } + + /* Make the canvas forget about us */ + + if (item->canvas && item == item->canvas->current_item) { + item->canvas->current_item = NULL; + item->canvas->need_repick = TRUE; + } + + if (item->canvas && item == item->canvas->new_current_item) { + item->canvas->new_current_item = NULL; + item->canvas->need_repick = TRUE; + } + + if (item->canvas && item == item->canvas->grabbed_item) { + item->canvas->grabbed_item = NULL; + gdk_pointer_ungrab(GDK_CURRENT_TIME); + } + + if (item->canvas && item == item->canvas->focused_item) { + item->canvas->focused_item = NULL; + } + + /* Normal destroy stuff */ + + if (item->object.flags & GANV_ITEM_MAPPED) { + (*GANV_ITEM_GET_CLASS(item)->unmap)(item); + } + + if (item->object.flags & GANV_ITEM_REALIZED) { + (*GANV_ITEM_GET_CLASS(item)->unrealize)(item); + } + + if (!item->managed && item->parent) { + if (GANV_ITEM_GET_CLASS(item->parent)->remove) { + GANV_ITEM_GET_CLASS(item->parent)->remove(item->parent, item); + } else { + fprintf(stderr, "warning: Item parent has no remove method\n"); + } + } + + G_OBJECT_CLASS(item_parent_class)->dispose(object); + /* items should remove any reference to item->canvas after the + first ::destroy */ + item->canvas = NULL; +} + +/* Realize handler for canvas items */ +static void +ganv_item_realize(GanvItem* item) +{ + GTK_OBJECT_SET_FLAGS(item, GANV_ITEM_REALIZED); + + ganv_item_request_update(item); +} + +/* Unrealize handler for canvas items */ +static void +ganv_item_unrealize(GanvItem* item) +{ + GTK_OBJECT_UNSET_FLAGS(item, GANV_ITEM_REALIZED); +} + +/* Map handler for canvas items */ +static void +ganv_item_map(GanvItem* item) +{ + GTK_OBJECT_SET_FLAGS(item, GANV_ITEM_MAPPED); +} + +/* Unmap handler for canvas items */ +static void +ganv_item_unmap(GanvItem* item) +{ + GTK_OBJECT_UNSET_FLAGS(item, GANV_ITEM_MAPPED); +} + +/* Update handler for canvas items */ +static void +ganv_item_update(GanvItem* item, int flags) +{ + GTK_OBJECT_UNSET_FLAGS(item, GANV_ITEM_NEED_UPDATE); + GTK_OBJECT_UNSET_FLAGS(item, GANV_ITEM_NEED_VIS); +} + +/* Point handler for canvas items */ +static double +ganv_item_point(GanvItem* item, + double x, double y, + int cx, int cy, + GanvItem** actual_item) +{ + *actual_item = NULL; + return G_MAXDOUBLE; +} + +void +ganv_item_invoke_update(GanvItem* item, int flags) +{ + int child_flags = flags; + + /* apply object flags to child flags */ + + child_flags &= ~GANV_CANVAS_BASE_UPDATE_REQUESTED; + + if (item->object.flags & GANV_ITEM_NEED_UPDATE) { + child_flags |= GANV_CANVAS_BASE_UPDATE_REQUESTED; + } + + if (item->object.flags & GANV_ITEM_NEED_VIS) { + child_flags |= GANV_CANVAS_BASE_UPDATE_VISIBILITY; + } + + if (child_flags & GCI_UPDATE_MASK) { + if (GANV_ITEM_GET_CLASS(item)->update) { + GANV_ITEM_GET_CLASS(item)->update(item, child_flags); + } + } +} + +/** + * ganv_item_set: + * @item: A canvas item. + * @first_arg_name: The list of object argument name/value pairs used to configure the item. + * @Varargs: + * + * Configures a canvas item. The arguments in the item are set to the specified + * values, and the item is repainted as appropriate. + **/ +void +ganv_item_set(GanvItem* item, const gchar* first_arg_name, ...) +{ + va_list args; + + va_start(args, first_arg_name); + ganv_item_set_valist(item, first_arg_name, args); + va_end(args); +} + +/** + * ganv_item_set_valist: + * @item: A canvas item. + * @first_arg_name: The name of the first argument used to configure the item. + * @args: The list of object argument name/value pairs used to configure the item. + * + * Configures a canvas item. The arguments in the item are set to the specified + * values, and the item is repainted as appropriate. + **/ +void +ganv_item_set_valist(GanvItem* item, const gchar* first_arg_name, va_list args) +{ + g_return_if_fail(GANV_IS_ITEM(item)); + + g_object_set_valist(G_OBJECT(item), first_arg_name, args); + + item->canvas->need_repick = TRUE; +} + +void +ganv_item_raise(GanvItem* item) +{ + ++item->layer; +} + +void +ganv_item_lower(GanvItem* item) +{ + --item->layer; +} + +/** + * ganv_item_move: + * @item: A canvas item. + * @dx: Horizontal offset. + * @dy: Vertical offset. + **/ +void +ganv_item_move(GanvItem* item, double dx, double dy) +{ + if (!item || !GANV_IS_ITEM(item)) { + return; + } + + item->x += dx; + item->y += dy; + + ganv_item_request_update(item); + item->canvas->need_repick = TRUE; +} + +/** + * ganv_item_show: + * @item: A canvas item. + * + * Shows a canvas item. If the item was already shown, then no action is taken. + **/ +void +ganv_item_show(GanvItem* item) +{ + g_return_if_fail(GANV_IS_ITEM(item)); + + if (!(item->object.flags & GANV_ITEM_VISIBLE)) { + item->object.flags |= GANV_ITEM_VISIBLE; + ganv_canvas_base_request_redraw(item->canvas, item->x1, item->y1, item->x2 + 1, + item->y2 + 1); + item->canvas->need_repick = TRUE; + } +} + +/** + * ganv_item_hide: + * @item: A canvas item. + * + * Hides a canvas item. If the item was already hidden, then no action is + * taken. + **/ +void +ganv_item_hide(GanvItem* item) +{ + g_return_if_fail(GANV_IS_ITEM(item)); + + if (item->object.flags & GANV_ITEM_VISIBLE) { + item->object.flags &= ~GANV_ITEM_VISIBLE; + ganv_canvas_base_request_redraw(item->canvas, item->x1, item->y1, item->x2 + 1, + item->y2 + 1); + item->canvas->need_repick = TRUE; + } +} + +/** + * ganv_item_grab: + * @item: A canvas item. + * @event_mask: Mask of events that will be sent to this item. + * @cursor: If non-NULL, the cursor that will be used while the grab is active. + * @etime: The timestamp required for grabbing the mouse, or GDK_CURRENT_TIME. + * + * Specifies that all events that match the specified event mask should be sent + * to the specified item, and also grabs the mouse by calling + * gdk_pointer_grab(). The event mask is also used when grabbing the pointer. + * If @cursor is not NULL, then that cursor is used while the grab is active. + * The @etime parameter is the timestamp required for grabbing the mouse. + * + * Return value: If an item was already grabbed, it returns %GDK_GRAB_ALREADY_GRABBED. If + * the specified item was hidden by calling ganv_item_hide(), then it + * returns %GDK_GRAB_NOT_VIEWABLE. Else, it returns the result of calling + * gdk_pointer_grab(). + **/ +int +ganv_item_grab(GanvItem* item, guint event_mask, GdkCursor* cursor, guint32 etime) +{ + int retval; + + g_return_val_if_fail(GANV_IS_ITEM(item), GDK_GRAB_NOT_VIEWABLE); + g_return_val_if_fail(GTK_WIDGET_MAPPED(item->canvas), GDK_GRAB_NOT_VIEWABLE); + + if (item->canvas->grabbed_item) { + return GDK_GRAB_ALREADY_GRABBED; + } + + if (!(item->object.flags & GANV_ITEM_VISIBLE)) { + return GDK_GRAB_NOT_VIEWABLE; + } + + retval = gdk_pointer_grab(item->canvas->layout.bin_window, + FALSE, + event_mask, + NULL, + cursor, + etime); + + if (retval != GDK_GRAB_SUCCESS) { + return retval; + } + + item->canvas->grabbed_item = item; + item->canvas->grabbed_event_mask = event_mask; + item->canvas->current_item = item; /* So that events go to the grabbed item */ + + return retval; +} + +/** + * ganv_item_ungrab: + * @item: A canvas item that holds a grab. + * @etime: The timestamp for ungrabbing the mouse. + * + * Ungrabs the item, which must have been grabbed in the canvas, and ungrabs the + * mouse. + **/ +void +ganv_item_ungrab(GanvItem* item, guint32 etime) +{ + g_return_if_fail(GANV_IS_ITEM(item)); + + if (item->canvas->grabbed_item != item) { + return; + } + + item->canvas->grabbed_item = NULL; + + gdk_pointer_ungrab(etime); +} + +void +ganv_item_i2w_offset(GanvItem* item, double* px, double* py) +{ + double x = 0.0; + double y = 0.0; + while (item) { + x += item->x; + y += item->y; + item = item->parent; + } + *px = x; + *py = y; +} + +/** + * ganv_item_i2w: + * @item: A canvas item. + * @x: X coordinate to convert (input/output value). + * @y: Y coordinate to convert (input/output value). + * + * Converts a coordinate pair from item-relative coordinates to world + * coordinates. + **/ +void +ganv_item_i2w(GanvItem* item, double* x, double* y) +{ + /*g_return_if_fail(GANV_IS_ITEM(item)); + g_return_if_fail(x != NULL); + g_return_if_fail(y != NULL);*/ + + double off_x; + double off_y; + ganv_item_i2w_offset(item, &off_x, &off_y); + + *x += off_x; + *y += off_y; +} + +void +ganv_item_i2w_pair(GanvItem* item, double* x1, double* y1, double* x2, double* y2) +{ + double off_x; + double off_y; + ganv_item_i2w_offset(item, &off_x, &off_y); + + *x1 += off_x; + *y1 += off_y; + *x2 += off_x; + *y2 += off_y; +} + +/** + * ganv_item_w2i: + * @item: A canvas item. + * @x: X coordinate to convert (input/output value). + * @y: Y coordinate to convert (input/output value). + * + * Converts a coordinate pair from world coordinates to item-relative + * coordinates. + **/ +void +ganv_item_w2i(GanvItem* item, double* x, double* y) +{ + double off_x; + double off_y; + ganv_item_i2w_offset(item, &off_x, &off_y); + + *x -= off_x; + *y -= off_y; +} + +/** + * ganv_item_grab_focus: + * @item: A canvas item. + * + * Makes the specified item take the keyboard focus, so all keyboard events will + * be sent to it. If the canvas widget itself did not have the focus, it grabs + * it as well. + **/ +void +ganv_item_grab_focus(GanvItem* item) +{ + GanvItem* focused_item; + GdkEvent ev; + + g_return_if_fail(GANV_IS_ITEM(item)); + g_return_if_fail(GTK_WIDGET_CAN_FOCUS(GTK_WIDGET(item->canvas))); + + focused_item = item->canvas->focused_item; + + if (focused_item) { + ev.focus_change.type = GDK_FOCUS_CHANGE; + ev.focus_change.window = GTK_LAYOUT(item->canvas)->bin_window; + ev.focus_change.send_event = FALSE; + ev.focus_change.in = FALSE; + + ganv_canvas_base_emit_event(item->canvas, &ev); + } + + item->canvas->focused_item = item; + gtk_widget_grab_focus(GTK_WIDGET(item->canvas)); + + if (focused_item) { + ev.focus_change.type = GDK_FOCUS_CHANGE; + ev.focus_change.window = GTK_LAYOUT(item->canvas)->bin_window; + ev.focus_change.send_event = FALSE; + ev.focus_change.in = TRUE; + + ganv_canvas_base_emit_event(item->canvas, &ev); + } +} + +void +ganv_item_emit_event(GanvItem* item, GdkEvent* event, gint* finished) +{ + g_signal_emit(item, item_signals[ITEM_EVENT], 0, event, finished); +} + +static void +ganv_item_default_bounds(GanvItem* item, double* x1, double* y1, double* x2, double* y2) +{ + *x1 = *y1 = *x2 = *y2 = 0.0; +} + +/** + * ganv_item_get_bounds: + * @item: A canvas item. + * @x1: Leftmost edge of the bounding box (return value). + * @y1: Upper edge of the bounding box (return value). + * @x2: Rightmost edge of the bounding box (return value). + * @y2: Lower edge of the bounding box (return value). + * + * Queries the bounding box of a canvas item. The bounds are returned in the + * coordinate system of the item's parent. + **/ +void +ganv_item_get_bounds(GanvItem* item, double* x1, double* y1, double* x2, double* y2) +{ + GANV_ITEM_GET_CLASS(item)->bounds(item, x1, y1, x2, y2); +} + +/** + * ganv_item_request_update: + * @item: A canvas item. + * + * To be used only by item implementations. Requests that the canvas queue an + * update for the specified item. + **/ +void +ganv_item_request_update(GanvItem* item) +{ + /* Note: At some point, if this short-circuit was enabled, the canvas stopped + updating items entirely when connected modules are removed. */ + if (item->object.flags & GANV_ITEM_NEED_UPDATE) { + return; + } + + if (!item->canvas) { + /* Item is being / has been destroyed, ignore */ + return; + } + + item->object.flags |= GANV_ITEM_NEED_UPDATE; + + if (item->parent != NULL) { + /* Recurse up the tree */ + ganv_item_request_update(item->parent); + } else { + /* Have reached the top of the tree, make sure the update call gets scheduled. */ + ganv_canvas_base_request_update(item->canvas); + } +} + +static gboolean +boolean_handled_accumulator(GSignalInvocationHint* ihint, + GValue* return_accu, + const GValue* handler_return, + gpointer dummy) +{ + gboolean continue_emission; + gboolean signal_handled; + + signal_handled = g_value_get_boolean(handler_return); + g_value_set_boolean(return_accu, signal_handled); + continue_emission = !signal_handled; + + return continue_emission; +} + +/* Class initialization function for GanvItemClass */ +static void +ganv_item_class_init(GanvItemClass* klass) +{ + GObjectClass* gobject_class; + + gobject_class = (GObjectClass*)klass; + + item_parent_class = (GtkObjectClass*)g_type_class_peek_parent(klass); + + gobject_class->set_property = ganv_item_set_property; + gobject_class->get_property = ganv_item_get_property; + + g_object_class_install_property + (gobject_class, ITEM_PROP_PARENT, + g_param_spec_object("parent", NULL, NULL, + GANV_TYPE_ITEM, + (G_PARAM_READABLE | G_PARAM_WRITABLE))); + + g_object_class_install_property + (gobject_class, ITEM_PROP_X, + g_param_spec_double("x", + _("X"), + _("X"), + -G_MAXDOUBLE, G_MAXDOUBLE, 0.0, + (G_PARAM_READABLE | G_PARAM_WRITABLE))); + g_object_class_install_property + (gobject_class, ITEM_PROP_Y, + g_param_spec_double("y", + _("Y"), + _("Y"), + -G_MAXDOUBLE, G_MAXDOUBLE, 0.0, + (G_PARAM_READABLE | G_PARAM_WRITABLE))); + + g_object_class_install_property + (gobject_class, ITEM_PROP_MANAGED, + g_param_spec_boolean("managed", + _("Managed"), + _("Whether the item is managed by its parent"), + 0, + (G_PARAM_READABLE | G_PARAM_WRITABLE))); + + item_signals[ITEM_EVENT] + = g_signal_new("event", + G_TYPE_FROM_CLASS(klass), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET(GanvItemClass, event), + boolean_handled_accumulator, NULL, + ganv_marshal_BOOLEAN__BOXED, + G_TYPE_BOOLEAN, 1, + GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE); + + gobject_class->dispose = ganv_item_dispose; + + klass->realize = ganv_item_realize; + klass->unrealize = ganv_item_unrealize; + klass->map = ganv_item_map; + klass->unmap = ganv_item_unmap; + klass->update = ganv_item_update; + klass->point = ganv_item_point; + klass->bounds = ganv_item_default_bounds; +} |