98 lines
2.3 KiB
C++
98 lines
2.3 KiB
C++
// Aseprite UI Library
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// Copyright (C) 2018-2021 Igara Studio S.A.
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// Copyright (C) 2001-2018 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 "ui/manager.h"
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#include "os/surface.h"
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#include "os/system.h"
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#include "os/window.h"
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#include "ui/overlay_manager.h"
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#include <vector>
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namespace ui {
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using namespace gfx;
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void move_region(Manager* manager, const Region& region, int dx, int dy)
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{
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os::Window* window = manager->display();
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ASSERT(window);
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if (!window)
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return;
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auto overlays = ui::OverlayManager::instance();
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gfx::Rect bounds = region.bounds();
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bounds |= gfx::Rect(bounds).offset(dx, dy);
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overlays->restoreOverlappedAreas(bounds);
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os::Surface* surface = window->surface();
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os::SurfaceLock lock(surface);
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// Fast path, move one rectangle.
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if (region.isRect()) {
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gfx::Rect rc = region.bounds();
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surface->scrollTo(rc, dx, dy);
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rc.offset(dx, dy);
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manager->dirtyRect(rc);
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}
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// As rectangles in the region internals are separated by bands
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// through the y-axis, we can sort the rectangles by y-axis and then
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// by x-axis to move rectangle by rectangle depending on the dx/dy
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// direction so we don't overlap each rectangle.
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else if (region.isComplex()) {
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std::size_t nrects = region.size();
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std::vector<gfx::Rect> rcs(nrects);
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std::copy(region.begin(), region.end(), rcs.begin());
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std::sort(
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rcs.begin(), rcs.end(),
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[dx, dy](const gfx::Rect& a, const gfx::Rect& b){
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if (dy < 0) {
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if (a.y < b.y)
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return true;
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else if (a.y == b.y) {
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if (dx < 0)
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return a.x < b.x;
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else
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return a.x > b.x;
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}
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else
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return false;
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}
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else {
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if (a.y > b.y)
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return true;
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else if (a.y == b.y) {
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if (dx < 0)
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return a.x < b.x;
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else
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return a.x > b.x;
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}
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else
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return false;
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}
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});
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for (gfx::Rect& rc : rcs) {
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surface->scrollTo(rc, dx, dy);
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rc.offset(dx, dy);
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manager->dirtyRect(rc);
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}
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}
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overlays->drawOverlays();
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}
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} // namespace ui
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