mirror of
https://gitlab.gnome.org/GNOME/gitg
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101 lines
2.4 KiB
Vala
101 lines
2.4 KiB
Vala
/*
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* This file is part of gitg
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*
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* Copyright (C) 2016 - Jesse van den Kieboom
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*
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* gitg is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* gitg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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 gitg. If not, see <http://www.gnu.org/licenses/>.
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*/
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class Gitg.DiffImageComposite : Gtk.DrawingArea
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{
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public Gitg.DiffImageSurfaceCache cache { get; set; }
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private void get_natural_size(out int image_width, out int image_height)
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{
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var pixbuf = cache.old_pixbuf;
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if (pixbuf == null)
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{
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image_width = 0;
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image_height = 0;
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return;
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}
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var window = get_window();
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double xscale = 1, yscale = 1;
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if (window != null)
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{
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cache.get_old_surface(get_window()).get_device_scale(out xscale, out yscale);
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}
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image_width = (int)(pixbuf.get_width() / xscale);
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image_height = (int)(pixbuf.get_height() / yscale);
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}
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protected void get_sizing(int width, out int image_width, out int image_height)
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{
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get_natural_size(out image_width, out image_height);
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// Scale down to fit in width
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if (image_width > width)
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{
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image_height *= width / image_width;
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image_width = width;
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}
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}
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protected override void get_preferred_width(out int minimum_width, out int natural_width)
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{
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int natural_height;
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get_natural_size(out natural_width, out natural_height);
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minimum_width = 0;
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}
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protected override void get_preferred_height_for_width(int width, out int minimum_height, out int natural_height)
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{
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int image_width, image_height;
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get_sizing(width, out image_width, out image_height);
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minimum_height = image_height;
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natural_height = image_height;
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}
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protected override Gtk.SizeRequestMode get_request_mode()
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{
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return Gtk.SizeRequestMode.HEIGHT_FOR_WIDTH;
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}
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protected override bool draw(Cairo.Context cr)
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{
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Gtk.Allocation alloc;
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get_allocation(out alloc);
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var ctx = get_style_context();
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ctx.render_background(cr, alloc.x, alloc.y, alloc.width, alloc.height);
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return true;
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}
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protected override void realize()
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{
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base.realize();
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queue_resize();
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}
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}
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