125 lines
3.8 KiB
C
125 lines
3.8 KiB
C
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/* Metacity animation effects */
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/*
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* Copyright (C) 2001 Anders Carlsson, Havoc Pennington
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#include "effects.h"
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#include "display.h"
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typedef struct
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{
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MetaScreen *screen;
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GC gc;
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int step;
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int steps;
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double current_x, current_y;
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double current_width, current_height;
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double delta_x, delta_y;
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double delta_width, delta_height;
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} BoxAnimationContext;
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static gboolean
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effects_draw_box_animation_timeout (BoxAnimationContext *context)
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{
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if (context->step == 0)
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{
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/* It's our first time, grab the X server */
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meta_display_grab (context->screen->display);
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}
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else
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{
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/* Restore the previously drawn background */
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XDrawRectangle (context->screen->display->xdisplay,
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context->screen->xroot,
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context->gc,
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context->current_x, context->current_y,
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context->current_width, context->current_height);
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}
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/* Return if we're done */
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if (context->step == context->steps)
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{
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meta_display_ungrab (context->screen->display);
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XFreeGC (context->screen->display->xdisplay,
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context->gc);
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g_free (context);
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return FALSE;
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}
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context->current_x += context->delta_x;
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context->current_y += context->delta_y;
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context->current_width += context->delta_width;
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context->current_height += context->delta_height;
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/* Draw the rectangle */
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XDrawRectangle (context->screen->display->xdisplay,
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context->screen->xroot,
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context->gc,
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context->current_x, context->current_y,
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context->current_width, context->current_height);
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context->step += 1;
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return TRUE;
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}
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void
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meta_effects_draw_box_animation (MetaScreen *screen,
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MetaRectangle *initial_rect,
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MetaRectangle *destination_rect,
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int steps,
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int delay)
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{
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BoxAnimationContext *context;
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XGCValues gc_values;
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/* Create the animation context */
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context = g_new (BoxAnimationContext, 1);
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gc_values.subwindow_mode = IncludeInferiors;
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gc_values.function = GXinvert;
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/* Create a gc for the root window */
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context->screen = screen;
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context->gc = XCreateGC (screen->display->xdisplay,
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screen->xroot,
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GCSubwindowMode | GCFunction,
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&gc_values);
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context->step = 0;
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context->steps = steps;
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context->delta_x = (destination_rect->x - initial_rect->x) / (double)steps;
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context->delta_y = (destination_rect->y - initial_rect->y) / (double)steps;
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context->delta_width = (destination_rect->width - initial_rect->width) / (double)steps;
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context->delta_height = (destination_rect->height - initial_rect->height) / (double)steps;
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context->current_x = initial_rect->x;
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context->current_y = initial_rect->y;
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context->current_width = initial_rect->width;
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context->current_height = initial_rect->height;
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/* Add the timeout */
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g_timeout_add (delay,
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(GSourceFunc)effects_draw_box_animation_timeout,
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context);
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}
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