Implement side-by-side tiling
When dragging a window over a screen edge and dropping it there, maximize it vertically and scale it horizontally to cover the corresponding half of the current monitor. Whenever a "hot area" which triggers this behavior is entered, an indication of window's target size is displayed after a short delay to avoid distraction when moving a window between monitors. https://bugzilla.gnome.org/show_bug.cgi?id=606260
This commit is contained in:
Florian Müllner
262
src/ui/tile-preview.c
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262
src/ui/tile-preview.c
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/* Mutter tile-preview marks the area a window will *ehm* snap to */
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/*
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* Copyright (C) 2010 Florian Müllner
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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 <config.h>
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#include <gtk/gtk.h>
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#include <cairo.h>
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#include "tile-preview.h"
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#include "core.h"
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#include "region.h"
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#define OUTLINE_WIDTH 5 /* frame width in non-composite case */
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struct _MetaTilePreview {
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GtkWidget *preview_window;
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gulong create_serial;
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GdkColor *preview_color;
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guchar preview_alpha;
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MetaRectangle tile_rect;
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gboolean has_alpha: 1;
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};
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static gboolean
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meta_tile_preview_expose (GtkWidget *widget,
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GdkEventExpose *event,
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gpointer user_data)
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{
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MetaTilePreview *preview = user_data;
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GdkWindow *window;
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cairo_t *cr;
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window = gtk_widget_get_window (widget);
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cr = gdk_cairo_create (window);
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cairo_set_line_width (cr, 1.0);
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if (preview->has_alpha)
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{
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/* Fill the preview area with a transparent color */
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cairo_set_source_rgba (cr,
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(double)preview->preview_color->red / 0xFFFF,
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(double)preview->preview_color->green / 0xFFFF,
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(double)preview->preview_color->blue / 0xFFFF,
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(double)preview->preview_alpha / 0xFF);
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cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
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cairo_paint (cr);
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/* Use the opaque color for the border */
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gdk_cairo_set_source_color (cr, preview->preview_color);
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}
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else
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{
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GtkStyle *style = gtk_widget_get_style (preview->preview_window);
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gdk_cairo_set_source_color (cr, &style->white);
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cairo_rectangle (cr,
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OUTLINE_WIDTH - 0.5, OUTLINE_WIDTH - 0.5,
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preview->tile_rect.width - 2 * (OUTLINE_WIDTH - 1) - 1,
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preview->tile_rect.height - 2 * (OUTLINE_WIDTH - 1) - 1);
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cairo_stroke (cr);
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}
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cairo_rectangle (cr,
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0.5, 0.5,
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preview->tile_rect.width - 1,
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preview->tile_rect.height - 1);
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cairo_stroke (cr);
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cairo_destroy (cr);
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return FALSE;
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}
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static void
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on_preview_window_style_set (GtkWidget *widget,
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GtkStyle *previous,
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gpointer user_data)
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{
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MetaTilePreview *preview = user_data;
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GtkStyle *style;
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style = gtk_rc_get_style_by_paths (gtk_widget_get_settings (widget),
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"GtkWindow.GtkIconView",
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"GtkWindow.GtkIconView",
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GTK_TYPE_ICON_VIEW);
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gtk_style_get (style, GTK_TYPE_ICON_VIEW,
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"selection-box-color", &preview->preview_color,
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"selection-box-alpha", &preview->preview_alpha,
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NULL);
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if (!preview->preview_color)
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{
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GdkColor selection = style->base[GTK_STATE_SELECTED];
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preview->preview_color = gdk_color_copy (&selection);
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}
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}
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MetaTilePreview *
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meta_tile_preview_new (int screen_number,
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gboolean composited)
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{
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MetaTilePreview *preview;
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GdkColormap *rgba_colormap;
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GdkScreen *screen;
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screen = gdk_display_get_screen (gdk_display_get_default (), screen_number);
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rgba_colormap = gdk_screen_get_rgba_colormap (screen);
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preview = g_new (MetaTilePreview, 1);
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preview->preview_window = gtk_window_new (GTK_WINDOW_POPUP);
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gtk_window_set_screen (GTK_WINDOW (preview->preview_window), screen);
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gtk_widget_set_app_paintable (preview->preview_window, TRUE);
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preview->preview_color = NULL;
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preview->preview_alpha = 0xFF;
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preview->tile_rect.x = preview->tile_rect.y = 0;
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preview->tile_rect.width = preview->tile_rect.height = 0;
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preview->has_alpha = rgba_colormap && composited;
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if (preview->has_alpha)
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{
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gtk_widget_set_colormap (preview->preview_window, rgba_colormap);
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g_signal_connect (preview->preview_window, "style-set",
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G_CALLBACK (on_preview_window_style_set), preview);
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}
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/* We make an assumption that XCreateWindow will be the first operation
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* when calling gtk_widget_realize() (via gdk_window_new()), or that it
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* is at least "close enough".
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*/
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preview->create_serial = XNextRequest (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()));
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gtk_widget_realize (preview->preview_window);
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gdk_window_set_back_pixmap (gtk_widget_get_window (preview->preview_window),
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NULL, FALSE);
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g_signal_connect (preview->preview_window, "expose-event",
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G_CALLBACK (meta_tile_preview_expose), preview);
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return preview;
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}
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void
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meta_tile_preview_free (MetaTilePreview *preview)
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{
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gtk_widget_destroy (preview->preview_window);
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if (preview->preview_color)
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gdk_color_free (preview->preview_color);
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g_free (preview);
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}
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void
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meta_tile_preview_show (MetaTilePreview *preview,
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MetaRectangle *tile_rect)
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{
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GdkWindow *window;
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GdkRectangle old_rect;
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if (gtk_widget_get_visible (preview->preview_window)
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&& preview->tile_rect.x == tile_rect->x
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&& preview->tile_rect.y == tile_rect->y
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&& preview->tile_rect.width == tile_rect->width
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&& preview->tile_rect.height == tile_rect->height)
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return; /* nothing to do */
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gtk_widget_show (preview->preview_window);
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window = gtk_widget_get_window (preview->preview_window);
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meta_core_lower_beneath_focus_window (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()),
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GDK_WINDOW_XWINDOW (window),
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gtk_get_current_event_time ());
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old_rect.x = old_rect.y = 0;
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old_rect.width = preview->tile_rect.width;
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old_rect.height = preview->tile_rect.height;
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gdk_window_invalidate_rect (window, &old_rect, FALSE);
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preview->tile_rect = *tile_rect;
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gdk_window_move_resize (window,
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preview->tile_rect.x, preview->tile_rect.y,
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preview->tile_rect.width, preview->tile_rect.height);
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if (!preview->has_alpha)
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{
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GdkRectangle outer_rect, inner_rect;
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MetaRegion *outer_region, *inner_region;
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GdkColor black;
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black = gtk_widget_get_style (preview->preview_window)->black;
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gdk_window_set_background (window, &black);
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outer_rect.x = outer_rect.y = 0;
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outer_rect.width = preview->tile_rect.width;
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outer_rect.height = preview->tile_rect.height;
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inner_rect.x = OUTLINE_WIDTH;
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inner_rect.y = OUTLINE_WIDTH;
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inner_rect.width = outer_rect.width - 2 * OUTLINE_WIDTH;
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inner_rect.height = outer_rect.height - 2 * OUTLINE_WIDTH;
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outer_region = meta_region_new_from_rectangle (&outer_rect);
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inner_region = meta_region_new_from_rectangle (&inner_rect);
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meta_region_subtract (outer_region, inner_region);
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meta_region_destroy (inner_region);
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gdk_window_shape_combine_region (window, outer_region, 0, 0);
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meta_region_destroy (outer_region);
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}
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}
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void
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meta_tile_preview_hide (MetaTilePreview *preview)
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{
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gtk_widget_hide (preview->preview_window);
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}
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Window
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meta_tile_preview_get_xwindow (MetaTilePreview *preview,
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gulong *create_serial)
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{
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GdkWindow *window = gtk_widget_get_window (preview->preview_window);
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if (create_serial)
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*create_serial = preview->create_serial;
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return GDK_WINDOW_XWINDOW (window);
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}
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