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https://github.com/aseprite/aseprite.git
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1aaeacc460
This is a work-in-progress to create a consistent API and finally separate the whole Aseprite base/gfx/ui libs into a reusable C++ library. Classes: app::IFileItem, app::AppMenuItem, app::skin::SkinPart, gfx::Rect, gfx::Border, she::FileDialog, ui::IButtonIcon, ui::Graphics, ui::Overlay, ui::Widget, ui::ScrollableViewDelegate, and UI events
83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
// Aseprite UI Library
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// Copyright (C) 2001-2013, 2015 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/scroll_bar.h"
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namespace ui {
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void setup_scrollbars(const gfx::Size& scrollableSize,
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gfx::Rect& viewportArea,
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Widget& parent,
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ScrollBar& hbar,
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ScrollBar& vbar)
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{
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#define NEED_BAR(w, h, width) \
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((scrollableSize.w > viewportArea.w) && \
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(vbar.getBarWidth() < fullViewportArea.w) && \
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(hbar.getBarWidth() < fullViewportArea.h))
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const gfx::Rect fullViewportArea = viewportArea;
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hbar.setSize(scrollableSize.w);
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vbar.setSize(scrollableSize.h);
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if (hbar.parent()) parent.removeChild(&hbar);
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if (vbar.parent()) parent.removeChild(&vbar);
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if (NEED_BAR(w, h, width)) {
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viewportArea.h -= hbar.getBarWidth();
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parent.addChild(&hbar);
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if (NEED_BAR(h, w, height)) {
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viewportArea.w -= vbar.getBarWidth();
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if (NEED_BAR(w, h, width))
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parent.addChild(&vbar);
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else {
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viewportArea.w += vbar.getBarWidth();
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viewportArea.h += hbar.getBarWidth();
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parent.removeChild(&hbar);
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}
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}
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}
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else if (NEED_BAR(h, w, height)) {
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viewportArea.w -= vbar.getBarWidth();
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parent.addChild(&vbar);
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if (NEED_BAR(w, h, width)) {
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viewportArea.h -= hbar.getBarWidth();
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if (NEED_BAR(h, w, height))
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parent.addChild(&hbar);
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else {
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viewportArea.w += vbar.getBarWidth();
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viewportArea.h += hbar.getBarWidth();
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parent.removeChild(&vbar);
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}
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}
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}
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if (parent.hasChild(&hbar)) {
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hbar.setBounds(gfx::Rect(viewportArea.x, viewportArea.y2(),
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viewportArea.w, hbar.getBarWidth()));
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hbar.setVisible(true);
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}
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else
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hbar.setVisible(false);
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if (parent.hasChild(&vbar)) {
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vbar.setBounds(gfx::Rect(viewportArea.x2(), viewportArea.y,
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vbar.getBarWidth(), viewportArea.h));
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vbar.setVisible(true);
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}
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else
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vbar.setVisible(false);
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}
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} // namespace ui
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