mirror of
https://github.com/aseprite/aseprite.git
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85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
// Aseprite UI Library
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// Copyright (C) 2001-2016 David Capello
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//
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// This file is released under the terms of the MIT license.
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// Read LICENSE.txt for more information.
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gfx/rect.h"
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#include "ui/base.h"
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#include "ui/system.h"
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namespace ui {
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int fit_bounds(int arrowAlign, const gfx::Rect& target, gfx::Rect& bounds)
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{
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bounds.x = target.x;
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bounds.y = target.y;
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int trycount = 0;
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for (; trycount < 4; ++trycount) {
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switch (arrowAlign) {
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case TOP | LEFT:
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bounds.x = target.x + target.w;
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bounds.y = target.y + target.h;
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break;
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case TOP | RIGHT:
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bounds.x = target.x - bounds.w;
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bounds.y = target.y + target.h;
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break;
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case BOTTOM | LEFT:
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bounds.x = target.x + target.w;
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bounds.y = target.y - bounds.h;
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break;
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case BOTTOM | RIGHT:
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bounds.x = target.x - bounds.w;
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bounds.y = target.y - bounds.h;
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break;
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case TOP:
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bounds.x = target.x + target.w/2 - bounds.w/2;
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bounds.y = target.y + target.h;
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break;
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case BOTTOM:
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bounds.x = target.x + target.w/2 - bounds.w/2;
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bounds.y = target.y - bounds.h;
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break;
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case LEFT:
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bounds.x = target.x + target.w;
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bounds.y = target.y + target.h/2 - bounds.h/2;
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break;
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case RIGHT:
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bounds.x = target.x - bounds.w;
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bounds.y = target.y + target.h/2 - bounds.h/2;
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break;
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}
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bounds.x = MID(0, bounds.x, ui::display_w()-bounds.w);
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bounds.y = MID(0, bounds.y, ui::display_h()-bounds.h);
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if (target.intersects(bounds)) {
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switch (trycount) {
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case 0:
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case 2:
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// Switch position
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if (arrowAlign & (TOP | BOTTOM)) arrowAlign ^= TOP | BOTTOM;
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if (arrowAlign & (LEFT | RIGHT)) arrowAlign ^= LEFT | RIGHT;
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break;
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case 1:
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// Rotate positions
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if (arrowAlign & (TOP | LEFT)) arrowAlign ^= TOP | LEFT;
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if (arrowAlign & (BOTTOM | RIGHT)) arrowAlign ^= BOTTOM | RIGHT;
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break;
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}
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}
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else
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break;
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}
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return arrowAlign;
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}
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} // namespace ui
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