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Diffstat (limited to 'src/effects.c')
-rw-r--r-- | src/effects.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/effects.c b/src/effects.c new file mode 100644 index 0000000..b5d7150 --- /dev/null +++ b/src/effects.c @@ -0,0 +1,124 @@ +/* Metacity animation effects */ + +/* + * Copyright (C) 2001 Anders Carlsson, Havoc Pennington + * + * This program 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 2 of the + * License, or (at your option) any later version. + * + * This program 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 more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ + +#include "effects.h" +#include "display.h" + +typedef struct +{ + MetaScreen *screen; + + GC gc; + + int step; + int steps; + + double current_x, current_y; + double current_width, current_height; + + double delta_x, delta_y; + double delta_width, delta_height; +} BoxAnimationContext; + +static gboolean +effects_draw_box_animation_timeout (BoxAnimationContext *context) +{ + if (context->step == 0) + { + /* It's our first time, grab the X server */ + meta_display_grab (context->screen->display); + } + else + { + /* Restore the previously drawn background */ + XDrawRectangle (context->screen->display->xdisplay, + context->screen->xroot, + context->gc, + context->current_x, context->current_y, + context->current_width, context->current_height); + } + + /* Return if we're done */ + if (context->step == context->steps) + { + meta_display_ungrab (context->screen->display); + XFreeGC (context->screen->display->xdisplay, + context->gc); + g_free (context); + return FALSE; + } + + context->current_x += context->delta_x; + context->current_y += context->delta_y; + context->current_width += context->delta_width; + context->current_height += context->delta_height; + + /* Draw the rectangle */ + XDrawRectangle (context->screen->display->xdisplay, + context->screen->xroot, + context->gc, + context->current_x, context->current_y, + context->current_width, context->current_height); + + context->step += 1; + + return TRUE; +} + +void +meta_effects_draw_box_animation (MetaScreen *screen, + MetaRectangle *initial_rect, + MetaRectangle *destination_rect, + int steps, + int delay) +{ + BoxAnimationContext *context; + XGCValues gc_values; + + /* Create the animation context */ + context = g_new (BoxAnimationContext, 1); + + gc_values.subwindow_mode = IncludeInferiors; + gc_values.function = GXinvert; + + /* Create a gc for the root window */ + context->screen = screen; + context->gc = XCreateGC (screen->display->xdisplay, + screen->xroot, + GCSubwindowMode | GCFunction, + &gc_values); + context->step = 0; + context->steps = steps; + context->delta_x = (destination_rect->x - initial_rect->x) / (double)steps; + context->delta_y = (destination_rect->y - initial_rect->y) / (double)steps; + context->delta_width = (destination_rect->width - initial_rect->width) / (double)steps; + context->delta_height = (destination_rect->height - initial_rect->height) / (double)steps; + + context->current_x = initial_rect->x; + context->current_y = initial_rect->y; + context->current_width = initial_rect->width; + context->current_height = initial_rect->height; + + /* Add the timeout */ + g_timeout_add (delay, + (GSourceFunc)effects_draw_box_animation_timeout, + context); +} |