diff options
Diffstat (limited to 'widgets/misc/e-canvas.c')
| -rw-r--r-- | widgets/misc/e-canvas.c | 1055 |
1 files changed, 0 insertions, 1055 deletions
diff --git a/widgets/misc/e-canvas.c b/widgets/misc/e-canvas.c deleted file mode 100644 index 0b9c00261a..0000000000 --- a/widgets/misc/e-canvas.c +++ /dev/null @@ -1,1055 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ -/* - * e-canvas.c - * Copyright 2000, 2001, Ximian, Inc. - * - * Authors: - * Chris Lahey <clahey@ximian.com> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License, version 2, as published by the Free Software Foundation. - * - * This library 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 - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA - * 02111-1307, USA. - */ - -#include <gtk/gtksignal.h> -#include "e-canvas.h" -#include "gal/util/e-util.h" - -static void e_canvas_init (ECanvas *card); -static void e_canvas_destroy (GtkObject *object); -static void e_canvas_class_init (ECanvasClass *klass); -static void e_canvas_realize (GtkWidget *widget); -static void e_canvas_unrealize (GtkWidget *widget); -static gint e_canvas_key (GtkWidget *widget, - GdkEventKey *event); -static gint e_canvas_button (GtkWidget *widget, - GdkEventButton *event); - -static gint e_canvas_visibility (GtkWidget *widget, - GdkEventVisibility *event, - ECanvas *canvas); - -static gint e_canvas_focus_in (GtkWidget *widget, - GdkEventFocus *event); -static gint e_canvas_focus_out (GtkWidget *widget, - GdkEventFocus *event); - -static int emit_event (GnomeCanvas *canvas, GdkEvent *event); - -static GnomeCanvasClass *parent_class = NULL; - -enum { - REFLOW, - LAST_SIGNAL -}; - -static guint e_canvas_signals [LAST_SIGNAL] = { 0, }; - -GtkType -e_canvas_get_type (void) -{ - static GtkType canvas_type = 0; - - if (!canvas_type) - { - static const GtkTypeInfo canvas_info = - { - "ECanvas", - sizeof (ECanvas), - sizeof (ECanvasClass), - (GtkClassInitFunc) e_canvas_class_init, - (GtkObjectInitFunc) e_canvas_init, - /* reserved_1 */ NULL, - /* reserved_2 */ NULL, - (GtkClassInitFunc) NULL, - }; - - canvas_type = gtk_type_unique (gnome_canvas_get_type (), &canvas_info); - } - - return canvas_type; -} - -static void -e_canvas_class_init (ECanvasClass *klass) -{ - GtkObjectClass *object_class; - GnomeCanvasClass *canvas_class; - GtkWidgetClass *widget_class; - - object_class = (GtkObjectClass*) klass; - canvas_class = (GnomeCanvasClass *) klass; - widget_class = (GtkWidgetClass *) klass; - - parent_class = gtk_type_class (gnome_canvas_get_type ()); - - object_class->destroy = e_canvas_destroy; - - widget_class->key_press_event = e_canvas_key; - widget_class->key_release_event = e_canvas_key; - widget_class->button_press_event = e_canvas_button; - widget_class->button_release_event = e_canvas_button; - widget_class->focus_in_event = e_canvas_focus_in; - widget_class->focus_out_event = e_canvas_focus_out; - widget_class->realize = e_canvas_realize; - widget_class->unrealize = e_canvas_unrealize; - - klass->reflow = NULL; - - e_canvas_signals [REFLOW] = - gtk_signal_new ("reflow", - GTK_RUN_LAST, - E_OBJECT_CLASS_TYPE (object_class), - GTK_SIGNAL_OFFSET (ECanvasClass, reflow), - gtk_marshal_NONE__NONE, - GTK_TYPE_NONE, 0); - - E_OBJECT_CLASS_ADD_SIGNALS (object_class, e_canvas_signals, LAST_SIGNAL); -} - -static void -e_canvas_init (ECanvas *canvas) -{ - canvas->selection = NULL; - canvas->cursor = NULL; - canvas->ic = NULL; - canvas->ic_attr = NULL; - canvas->tooltip_window = NULL; -} - -static void -e_canvas_destroy (GtkObject *object) -{ - ECanvas *canvas = E_CANVAS(object); - - if (canvas->idle_id) - g_source_remove(canvas->idle_id); - canvas->idle_id = 0; - - if (canvas->toplevel) { - if (canvas->visibility_notify_id) - gtk_signal_disconnect (GTK_OBJECT(canvas->toplevel), - canvas->visibility_notify_id); - canvas->visibility_notify_id = 0; - - gtk_object_unref(GTK_OBJECT(canvas->toplevel)); - canvas->toplevel = NULL; - } - - e_canvas_hide_tooltip(canvas); - - if ((GTK_OBJECT_CLASS (parent_class))->destroy) - (*(GTK_OBJECT_CLASS (parent_class))->destroy) (object); -} - -GtkWidget * -e_canvas_new () -{ - return GTK_WIDGET (gtk_type_new (e_canvas_get_type ())); -} - - -/* Returns whether the item is an inferior of or is equal to the parent. */ -static int -is_descendant (GnomeCanvasItem *item, GnomeCanvasItem *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 (GnomeCanvas *canvas, GdkEvent *event) -{ - GdkEvent ev; - gint finished; - GnomeCanvasItem *item; - GnomeCanvasItem *parent; - guint mask; - - /* Perform checks for grabbed items */ - - if (canvas->grabbed_item && !is_descendant (canvas->current_item, canvas->grabbed_item)) - return FALSE; - - if (canvas->grabbed_item) { - switch (event->type) { - case GDK_ENTER_NOTIFY: - mask = GDK_ENTER_NOTIFY_MASK; - break; - - case GDK_LEAVE_NOTIFY: - mask = GDK_LEAVE_NOTIFY_MASK; - break; - - case GDK_MOTION_NOTIFY: - mask = GDK_POINTER_MOTION_MASK; - break; - - case GDK_BUTTON_PRESS: - case GDK_2BUTTON_PRESS: - case GDK_3BUTTON_PRESS: - mask = GDK_BUTTON_PRESS_MASK; - break; - - case GDK_BUTTON_RELEASE: - mask = GDK_BUTTON_RELEASE_MASK; - break; - - case GDK_KEY_PRESS: - mask = GDK_KEY_PRESS_MASK; - break; - - case GDK_KEY_RELEASE: - mask = GDK_KEY_RELEASE_MASK; - break; - - default: - mask = 0; - break; - } - - if (!(mask & canvas->grabbed_event_mask)) - return FALSE; - } - - /* Convert to world coordinates -- we have two cases because of diferent - * offsets of the fields in the event structures. - */ - - ev = *event; - - switch (ev.type) { - case GDK_ENTER_NOTIFY: - case GDK_LEAVE_NOTIFY: - gnome_canvas_window_to_world (canvas, - ev.crossing.x, ev.crossing.y, - &ev.crossing.x, &ev.crossing.y); - break; - - case GDK_MOTION_NOTIFY: - case GDK_BUTTON_PRESS: - case GDK_2BUTTON_PRESS: - case GDK_3BUTTON_PRESS: - case GDK_BUTTON_RELEASE: - gnome_canvas_window_to_world (canvas, - ev.motion.x, ev.motion.y, - &ev.motion.x, &ev.motion.y); - break; - - default: - break; - } - - /* Choose where we send the event */ - - item = canvas->current_item; - - if (canvas->focused_item - && ((event->type == GDK_KEY_PRESS) || (event->type == GDK_KEY_RELEASE) || (event->type == GDK_FOCUS_CHANGE))) - item = canvas->focused_item; - - /* The event is propagated up the hierarchy (for if someone connected to - * a group instead of a leaf event), and emission is stopped if a - * handler returns TRUE, just like for GtkWidget events. - */ - - finished = FALSE; - - while (item && !finished) { - gtk_object_ref (GTK_OBJECT (item)); - - gtk_signal_emit_by_name (GTK_OBJECT (item), "event", - &ev, - &finished); - - if (GTK_OBJECT_DESTROYED (item)) - finished = TRUE; - - parent = item->parent; - gtk_object_unref (GTK_OBJECT (item)); - - item = parent; - } - - return finished; -} - -/* Key event handler for the canvas */ -static gint -e_canvas_key (GtkWidget *widget, GdkEventKey *event) -{ - GnomeCanvas *canvas; - GdkEvent full_event; - - g_return_val_if_fail (widget != NULL, FALSE); - g_return_val_if_fail (GNOME_IS_CANVAS (widget), FALSE); - g_return_val_if_fail (event != NULL, FALSE); - - canvas = GNOME_CANVAS (widget); - - full_event.key = *event; - - return emit_event (canvas, &full_event); -} - - -/* This routine invokes the point method of the item. The argument x, y should - * be in the parent's item-relative coordinate system. This routine applies the - * inverse of the item's transform, maintaining the affine invariant. - */ -#define HACKISH_AFFINE - -static double -gnome_canvas_item_invoke_point (GnomeCanvasItem *item, double x, double y, int cx, int cy, - GnomeCanvasItem **actual_item) -{ -#ifdef HACKISH_AFFINE - double i2w[6], w2c[6], i2c[6], c2i[6]; - ArtPoint c, i; -#endif - -#ifdef HACKISH_AFFINE - gnome_canvas_item_i2w_affine (item, i2w); - gnome_canvas_w2c_affine (item->canvas, w2c); - art_affine_multiply (i2c, i2w, w2c); - art_affine_invert (c2i, i2c); - c.x = cx; - c.y = cy; - art_affine_point (&i, &c, c2i); - x = i.x; - y = i.y; -#endif - - return (* GNOME_CANVAS_ITEM_CLASS (item->object.klass)->point) ( - item, x, y, cx, cy, actual_item); -} - -/* Re-picks the current item in the canvas, based on the event's coordinates. - * Also emits enter/leave events for items as appropriate. - */ -#define DISPLAY_X1(canvas) (GNOME_CANVAS (canvas)->layout.xoffset) -#define DISPLAY_Y1(canvas) (GNOME_CANVAS (canvas)->layout.yoffset) -static int -pick_current_item (GnomeCanvas *canvas, GdkEvent *event) -{ - int button_down; - double x, y; - int cx, cy; - int retval; - - retval = FALSE; - - /* If a button is down, we'll perform enter and leave events on the - * current item, but not enter on any other item. This is more or less - * like X pointer grabbing for canvas items. - */ - button_down = canvas->state & (GDK_BUTTON1_MASK - | GDK_BUTTON2_MASK - | GDK_BUTTON3_MASK - | GDK_BUTTON4_MASK - | GDK_BUTTON5_MASK); - if (!button_down) - canvas->left_grabbed_item = FALSE; - - /* Save the event in the canvas. This is used to synthesize enter and - * leave events in case the current item changes. It is also used to - * re-pick the current item if the current one gets deleted. Also, - * synthesize an enter event. - */ - if (event != &canvas->pick_event) { - if ((event->type == GDK_MOTION_NOTIFY) || (event->type == GDK_BUTTON_RELEASE)) { - /* these fields have the same offsets in both types of events */ - - canvas->pick_event.crossing.type = GDK_ENTER_NOTIFY; - canvas->pick_event.crossing.window = event->motion.window; - canvas->pick_event.crossing.send_event = event->motion.send_event; - canvas->pick_event.crossing.subwindow = NULL; - canvas->pick_event.crossing.x = event->motion.x; - canvas->pick_event.crossing.y = event->motion.y; - canvas->pick_event.crossing.mode = GDK_CROSSING_NORMAL; - canvas->pick_event.crossing.detail = GDK_NOTIFY_NONLINEAR; - canvas->pick_event.crossing.focus = FALSE; - canvas->pick_event.crossing.state = event->motion.state; - - /* these fields don't have the same offsets in both types of events */ - - if (event->type == GDK_MOTION_NOTIFY) { - canvas->pick_event.crossing.x_root = event->motion.x_root; - canvas->pick_event.crossing.y_root = event->motion.y_root; - } else { - canvas->pick_event.crossing.x_root = event->button.x_root; - canvas->pick_event.crossing.y_root = event->button.y_root; - } - } else - canvas->pick_event = *event; - } - - /* Don't do anything else if this is a recursive call */ - - if (canvas->in_repick) - return retval; - - /* LeaveNotify means that there is no current item, so we don't look for one */ - - if (canvas->pick_event.type != GDK_LEAVE_NOTIFY) { - /* these fields don't have the same offsets in both types of events */ - - if (canvas->pick_event.type == GDK_ENTER_NOTIFY) { - x = canvas->pick_event.crossing.x + DISPLAY_X1 (canvas) - canvas->zoom_xofs; - y = canvas->pick_event.crossing.y + DISPLAY_Y1 (canvas) - canvas->zoom_yofs; - } else { - x = canvas->pick_event.motion.x + DISPLAY_X1 (canvas) - canvas->zoom_xofs; - y = canvas->pick_event.motion.y + DISPLAY_Y1 (canvas) - canvas->zoom_yofs; - } - - /* canvas pixel coords */ - - cx = (int) (x + 0.5); - cy = (int) (y + 0.5); - - /* world coords */ - - x = canvas->scroll_x1 + x / canvas->pixels_per_unit; - y = canvas->scroll_y1 + y / canvas->pixels_per_unit; - - /* find the closest item */ - - if (canvas->root->object.flags & GNOME_CANVAS_ITEM_VISIBLE) - gnome_canvas_item_invoke_point (canvas->root, x, y, cx, cy, - &canvas->new_current_item); - else - canvas->new_current_item = NULL; - } else - canvas->new_current_item = NULL; - - if ((canvas->new_current_item == canvas->current_item) && !canvas->left_grabbed_item) - return retval; /* current item did not change */ - - /* Synthesize events for old and new current items */ - - if ((canvas->new_current_item != canvas->current_item) - && (canvas->current_item != NULL) - && !canvas->left_grabbed_item) { - GdkEvent new_event; - GnomeCanvasItem *item; - - item = canvas->current_item; - - new_event = canvas->pick_event; - new_event.type = GDK_LEAVE_NOTIFY; - - new_event.crossing.detail = GDK_NOTIFY_ANCESTOR; - new_event.crossing.subwindow = NULL; - canvas->in_repick = TRUE; - retval = 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 */ - - if ((canvas->new_current_item != canvas->current_item) && button_down) { - canvas->left_grabbed_item = TRUE; - return retval; - } - - /* Handle the rest of cases */ - - canvas->left_grabbed_item = FALSE; - canvas->current_item = canvas->new_current_item; - - if (canvas->current_item != NULL) { - GdkEvent new_event; - - new_event = canvas->pick_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); - } - - return retval; -} - -/* Button event handler for the canvas */ -static gint -e_canvas_button (GtkWidget *widget, GdkEventButton *event) -{ - GnomeCanvas *canvas; - int mask; - int retval; - - g_return_val_if_fail (widget != NULL, FALSE); - g_return_val_if_fail (GNOME_IS_CANVAS (widget), FALSE); - g_return_val_if_fail (event != NULL, FALSE); - - retval = FALSE; - - canvas = GNOME_CANVAS (widget); - - /* dispatch normally regardless of the event's window if an item has - has a pointer grab in effect */ - if (!canvas->grabbed_item && event->window != canvas->layout.bin_window) - return retval; - - switch (event->button) { - case 1: - mask = GDK_BUTTON1_MASK; - break; - case 2: - mask = GDK_BUTTON2_MASK; - break; - case 3: - mask = GDK_BUTTON3_MASK; - break; - case 4: - mask = GDK_BUTTON4_MASK; - break; - case 5: - mask = GDK_BUTTON5_MASK; - break; - default: - mask = 0; - } - - switch (event->type) { - case GDK_BUTTON_PRESS: - case GDK_2BUTTON_PRESS: - case GDK_3BUTTON_PRESS: - /* Pick the current item as if the button were not pressed, and - * then process the event. - */ - canvas->state = event->state; - pick_current_item (canvas, (GdkEvent *) event); - canvas->state ^= mask; - retval = emit_event (canvas, (GdkEvent *) event); - break; - - case GDK_BUTTON_RELEASE: - /* Process the event as if the button were pressed, then repick - * after the button has been released - */ - canvas->state = event->state; - retval = emit_event (canvas, (GdkEvent *) event); - event->state ^= mask; - canvas->state = event->state; - pick_current_item (canvas, (GdkEvent *) event); - event->state ^= mask; - break; - - default: - g_assert_not_reached (); - } - - return retval; -} - -/* Key event handler for the canvas */ -static gint -e_canvas_visibility (GtkWidget *widget, GdkEventVisibility *event, ECanvas *canvas) -{ - if (! canvas->visibility_first) { - e_canvas_hide_tooltip(canvas); - } - canvas->visibility_first = FALSE; - - return FALSE; -} - - -/** - * e_canvas_item_grab_focus: - * @item: A canvas item. - * @widget_too: Whether or not to grab the widget-level focus too - * - * 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 and @widget_too is %TRUE, it grabs that focus as well. - **/ -void -e_canvas_item_grab_focus (GnomeCanvasItem *item, gboolean widget_too) -{ - GnomeCanvasItem *focused_item; - GdkEvent ev; - - g_return_if_fail (item != NULL); - g_return_if_fail (GNOME_IS_CANVAS_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; - - if (widget_too && !GTK_WIDGET_HAS_FOCUS (GTK_WIDGET(item->canvas))) { - gtk_widget_grab_focus (GTK_WIDGET (item->canvas)); - } - - if (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); - } -} - -/* Focus in handler for the canvas */ -static gint -e_canvas_focus_in (GtkWidget *widget, GdkEventFocus *event) -{ - GnomeCanvas *canvas; - ECanvas *ecanvas; - GdkEvent full_event; - - canvas = GNOME_CANVAS (widget); - ecanvas = E_CANVAS (widget); - - GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS); - - if (ecanvas->ic) - gdk_im_begin (ecanvas->ic, canvas->layout.bin_window); - - if (canvas->focused_item) { - full_event.focus_change = *event; - return emit_event (canvas, &full_event); - } else { - return FALSE; - } -} - -/* Focus out handler for the canvas */ -static gint -e_canvas_focus_out (GtkWidget *widget, GdkEventFocus *event) -{ - GnomeCanvas *canvas; - ECanvas *ecanvas; - GdkEvent full_event; - - canvas = GNOME_CANVAS (widget); - ecanvas = E_CANVAS (widget); - - GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS); - - if (ecanvas->ic) - gdk_im_end (); - - if (canvas->focused_item) { - full_event.focus_change = *event; - return emit_event (canvas, &full_event); - } else { - return FALSE; - } -} - -static void -e_canvas_realize (GtkWidget *widget) -{ - gint width, height; - ECanvas *ecanvas = E_CANVAS (widget); - - if (GTK_WIDGET_CLASS (parent_class)->realize) - (* GTK_WIDGET_CLASS (parent_class)->realize) (widget); - - gdk_window_set_back_pixmap (GTK_LAYOUT (widget)->bin_window, NULL, FALSE); - - if (gdk_im_ready () && (ecanvas->ic_attr = gdk_ic_attr_new ()) != NULL) { - GdkEventMask mask; - GdkICAttr *attr = ecanvas->ic_attr; - GdkICAttributesType attrmask = GDK_IC_ALL_REQ; - GdkIMStyle style; - GdkIMStyle supported_style = GDK_IM_PREEDIT_NONE | - GDK_IM_PREEDIT_NOTHING | - GDK_IM_PREEDIT_POSITION | - GDK_IM_STATUS_NONE | - GDK_IM_STATUS_NOTHING; - - if(widget->style && widget->style->font->type != GDK_FONT_FONTSET) - supported_style &= ~GDK_IM_PREEDIT_POSITION; - - attr->style = style = gdk_im_decide_style (supported_style); - attr->client_window = ecanvas->parent.layout.bin_window; - - switch (style & GDK_IM_PREEDIT_MASK) - { - case GDK_IM_PREEDIT_POSITION: - if (widget->style && widget->style->font->type != GDK_FONT_FONTSET) - { - g_warning ("over-the-spot style requires fontset"); - break; - } - - gdk_window_get_size (attr->client_window, &width, &height); - height = widget->style->font->ascent + - widget->style->font->descent; - - attrmask |= GDK_IC_PREEDIT_POSITION_REQ; - attr->spot_location.x = 0; - attr->spot_location.y = height; - attr->preedit_area.x = 0; - attr->preedit_area.y = 0; - attr->preedit_area.width = width; - attr->preedit_area.height = height; - attr->preedit_fontset = widget->style->font; - - break; - } - - ecanvas->ic = gdk_ic_new (attr, attrmask); - if (ecanvas->ic != NULL) { - mask = gdk_window_get_events (attr->client_window); - mask |= gdk_ic_get_events (ecanvas->ic); - gdk_window_set_events (attr->client_window, mask); - - if (GTK_WIDGET_HAS_FOCUS (widget)) - gdk_im_begin (ecanvas->ic, attr->client_window); - } else - g_warning ("Can't create input context."); - } - -} - -static void -e_canvas_unrealize (GtkWidget *widget) -{ - ECanvas * ecanvas = E_CANVAS (widget); - - if (ecanvas->idle_id) - g_source_remove(ecanvas->idle_id); - ecanvas->idle_id = 0; - - if (ecanvas->ic) { - gdk_ic_destroy (ecanvas->ic); - ecanvas->ic = NULL; - } - if (ecanvas->ic_attr) { - gdk_ic_attr_destroy (ecanvas->ic_attr); - ecanvas->ic_attr = NULL; - } - if (GTK_WIDGET_CLASS (parent_class)->unrealize) - (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget); -} - -static void -e_canvas_item_invoke_reflow (GnomeCanvasItem *item, int flags) -{ - GnomeCanvasGroup *group; - GList *list; - GnomeCanvasItem *child; - - if (GNOME_IS_CANVAS_GROUP (item)) { - group = GNOME_CANVAS_GROUP (item); - for (list = group->item_list; list; list = list->next) { - child = GNOME_CANVAS_ITEM (list->data); - if (child->object.flags & E_CANVAS_ITEM_DESCENDENT_NEEDS_REFLOW) - e_canvas_item_invoke_reflow (child, flags); - } - } - - if (item->object.flags & E_CANVAS_ITEM_NEEDS_REFLOW) { - ECanvasItemReflowFunc func; - func = gtk_object_get_data (GTK_OBJECT (item), - "ECanvasItem::reflow_callback"); - if (func) - func (item, flags); - } - - item->object.flags &= ~E_CANVAS_ITEM_NEEDS_REFLOW; - item->object.flags &= ~E_CANVAS_ITEM_DESCENDENT_NEEDS_REFLOW; -} - -static void -do_reflow (ECanvas *canvas) -{ - if (GNOME_CANVAS(canvas)->root->object.flags & E_CANVAS_ITEM_DESCENDENT_NEEDS_REFLOW) - e_canvas_item_invoke_reflow (GNOME_CANVAS(canvas)->root, 0); -} - -/* Idle handler for the e-canvas. It deals with pending reflows. */ -static gint -idle_handler (gpointer data) -{ - ECanvas *canvas; - - GDK_THREADS_ENTER(); - - canvas = E_CANVAS (data); - do_reflow (canvas); - - /* Reset idle id */ - canvas->idle_id = 0; - - gtk_signal_emit (GTK_OBJECT (canvas), - e_canvas_signals [REFLOW]); - - GDK_THREADS_LEAVE(); - - return FALSE; -} - -/* Convenience function to add an idle handler to a canvas */ -static void -add_idle (ECanvas *canvas) -{ - if (canvas->idle_id != 0) - return; - - canvas->idle_id = g_idle_add_full (G_PRIORITY_HIGH_IDLE, idle_handler, (gpointer) canvas, NULL); -} - -static void -e_canvas_item_descendent_needs_reflow (GnomeCanvasItem *item) -{ - if (item->object.flags & E_CANVAS_ITEM_DESCENDENT_NEEDS_REFLOW) - return; - - item->object.flags |= E_CANVAS_ITEM_DESCENDENT_NEEDS_REFLOW; - if (item->parent) - e_canvas_item_descendent_needs_reflow(item->parent); -} - -void -e_canvas_item_request_reflow (GnomeCanvasItem *item) -{ - if (item->object.flags & GNOME_CANVAS_ITEM_REALIZED) { - item->object.flags |= E_CANVAS_ITEM_NEEDS_REFLOW; - e_canvas_item_descendent_needs_reflow(item); - add_idle(E_CANVAS(item->canvas)); - } -} - -void -e_canvas_item_request_parent_reflow (GnomeCanvasItem *item) -{ - g_return_if_fail(item != NULL); - g_return_if_fail(GNOME_IS_CANVAS_ITEM(item)); - e_canvas_item_request_reflow(item->parent); -} - -void -e_canvas_item_set_reflow_callback (GnomeCanvasItem *item, ECanvasItemReflowFunc func) -{ - gtk_object_set_data(GTK_OBJECT(item), "ECanvasItem::reflow_callback", (gpointer) func); -} - - -void -e_canvas_item_set_selection_callback (GnomeCanvasItem *item, ECanvasItemSelectionFunc func) -{ - gtk_object_set_data(GTK_OBJECT(item), "ECanvasItem::selection_callback", (gpointer) func); -} - -void -e_canvas_item_set_selection_compare_callback (GnomeCanvasItem *item, ECanvasItemSelectionCompareFunc func) -{ - gtk_object_set_data(GTK_OBJECT(item), "ECanvasItem::selection_compare_callback", (gpointer) func); -} - -void -e_canvas_item_set_cursor (GnomeCanvasItem *item, gpointer id) -{ - GList *list; - int flags; - ECanvas *canvas; - ECanvasSelectionInfo *info; - ECanvasItemSelectionFunc func; - - g_return_if_fail(item != NULL); - g_return_if_fail(GNOME_IS_CANVAS_ITEM(item)); - g_return_if_fail(item->canvas != NULL); - g_return_if_fail(E_IS_CANVAS(item->canvas)); - - canvas = E_CANVAS(item->canvas); - flags = E_CANVAS_ITEM_SELECTION_DELETE_DATA; - - for (list = canvas->selection; list; list = g_list_next(list)) { - info = list->data; - - func = gtk_object_get_data(GTK_OBJECT(info->item), "ECanvasItem::selection_callback"); - if (func) - func(info->item, flags, info->id); - g_message ("ECANVAS: free info (2): item %p, id %p", - info->item, info->id); - gtk_object_unref (GTK_OBJECT (info->item)); - g_free(info); - } - g_list_free(canvas->selection); - - canvas->selection = NULL; - - gnome_canvas_item_grab_focus(item); - - info = g_new(ECanvasSelectionInfo, 1); - info->item = item; - gtk_object_ref (GTK_OBJECT (info->item)); - info->id = id; - g_message ("ECANVAS: new info item %p, id %p", item, id); - - flags = E_CANVAS_ITEM_SELECTION_SELECT | E_CANVAS_ITEM_SELECTION_CURSOR; - func = gtk_object_get_data(GTK_OBJECT(item), "ECanvasItem::selection_callback"); - if (func) - func(item, flags, id); - - canvas->selection = g_list_prepend(canvas->selection, info); - canvas->cursor = info; -} - -void -e_canvas_item_set_cursor_end (GnomeCanvasItem *item, gpointer id) -{ -} - -void -e_canvas_item_add_selection (GnomeCanvasItem *item, gpointer id) -{ - int flags; - ECanvas *canvas; - ECanvasSelectionInfo *info; - ECanvasItemSelectionFunc func; - GList *list; - - g_return_if_fail(item != NULL); - g_return_if_fail(GNOME_IS_CANVAS_ITEM(item)); - g_return_if_fail(item->canvas != NULL); - g_return_if_fail(E_IS_CANVAS(item->canvas)); - - flags = E_CANVAS_ITEM_SELECTION_SELECT; - canvas = E_CANVAS(item->canvas); - - if (canvas->cursor) { - func = gtk_object_get_data(GTK_OBJECT(canvas->cursor->item), "ECanvasItem::selection_callback"); - if (func) - func(canvas->cursor->item, flags, canvas->cursor->id); - } - - gnome_canvas_item_grab_focus(item); - - flags = E_CANVAS_ITEM_SELECTION_SELECT | E_CANVAS_ITEM_SELECTION_CURSOR; - - for (list = canvas->selection; list; list = g_list_next(list)) { - ECanvasSelectionInfo *search; - search = list->data; - - if (search->item == item) { - ECanvasItemSelectionCompareFunc compare_func; - compare_func = gtk_object_get_data(GTK_OBJECT(search->item), "ECanvasItem::selection_compare_callback"); - - if (compare_func(search->item, search->id, id, 0) == 0) { - canvas->cursor = search; - func = gtk_object_get_data(GTK_OBJECT(item), "ECanvasItem::selection_callback"); - if (func) - func(item, flags, search->id); - return; - } - } - } - - info = g_new(ECanvasSelectionInfo, 1); - info->item = item; - gtk_object_ref (GTK_OBJECT (info->item)); - info->id = id; - g_message ("ECANVAS: new info (2): item %p, id %p", item, id); - - func = gtk_object_get_data(GTK_OBJECT(item), "ECanvasItem::selection_callback"); - if (func) - func(item, flags, id); - - canvas->selection = g_list_prepend(canvas->selection, info); - canvas->cursor = info; -} - -void -e_canvas_item_remove_selection (GnomeCanvasItem *item, gpointer id) -{ - int flags; - ECanvas *canvas; - ECanvasSelectionInfo *info; - GList *list; - - g_return_if_fail(item != NULL); - g_return_if_fail(GNOME_IS_CANVAS_ITEM(item)); - g_return_if_fail(item->canvas != NULL); - g_return_if_fail(E_IS_CANVAS(item->canvas)); - - flags = E_CANVAS_ITEM_SELECTION_DELETE_DATA; - canvas = E_CANVAS(item->canvas); - - for (list = canvas->selection; list; list = g_list_next(list)) { - info = list->data; - - if (info->item == item) { - ECanvasItemSelectionCompareFunc compare_func; - compare_func = gtk_object_get_data(GTK_OBJECT(info->item), "ECanvasItem::selection_compare_callback"); - - if (compare_func(info->item, info->id, id, 0) == 0) { - ECanvasItemSelectionFunc func; - func = gtk_object_get_data(GTK_OBJECT(info->item), "ECanvasItem::selection_callback"); - if (func) - func(info->item, flags, info->id); - canvas->selection = g_list_remove_link(canvas->selection, list); - - if (canvas->cursor == info) - canvas->cursor = NULL; - - g_message ("ECANVAS: removing info: item %p, info %p", - info->item, info->id); - gtk_object_unref (GTK_OBJECT (info->item)); - g_free(info); - g_list_free_1(list); - break; - } - } - } -} - -void e_canvas_popup_tooltip (ECanvas *canvas, GtkWidget *widget, int x, int y) -{ - if (canvas->tooltip_window && canvas->tooltip_window != widget) { - e_canvas_hide_tooltip(canvas); - } - canvas->tooltip_window = widget; - canvas->visibility_first = TRUE; - if (canvas->toplevel == NULL) { - canvas->toplevel = gtk_widget_get_toplevel (GTK_WIDGET(canvas)); - if (canvas->toplevel) { - gtk_widget_add_events(canvas->toplevel, GDK_VISIBILITY_NOTIFY_MASK); - gtk_object_ref(GTK_OBJECT(canvas->toplevel)); - canvas->visibility_notify_id = - gtk_signal_connect (GTK_OBJECT (canvas->toplevel), "visibility_notify_event", - GTK_SIGNAL_FUNC (e_canvas_visibility), canvas); - } - } - gtk_widget_popup (widget, x, y); -} - -void e_canvas_hide_tooltip (ECanvas *canvas) -{ - if (canvas->tooltip_window) { - gtk_widget_destroy (canvas->tooltip_window); - canvas->tooltip_window = NULL; - } -} |