297 lines
10 KiB
C++
297 lines
10 KiB
C++
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/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2020 - Raw Material Software Limited
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 6 End-User License
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Agreement and JUCE Privacy Policy (both effective as of the 16th June 2020).
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End User License Agreement: www.juce.com/juce-6-licence
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Privacy Policy: www.juce.com/juce-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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ComponentBoundsConstrainer::ComponentBoundsConstrainer() noexcept {}
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ComponentBoundsConstrainer::~ComponentBoundsConstrainer() {}
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//==============================================================================
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void ComponentBoundsConstrainer::setMinimumWidth (int minimumWidth) noexcept { minW = minimumWidth; }
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void ComponentBoundsConstrainer::setMaximumWidth (int maximumWidth) noexcept { maxW = maximumWidth; }
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void ComponentBoundsConstrainer::setMinimumHeight (int minimumHeight) noexcept { minH = minimumHeight; }
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void ComponentBoundsConstrainer::setMaximumHeight (int maximumHeight) noexcept { maxH = maximumHeight; }
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void ComponentBoundsConstrainer::setMinimumSize (int minimumWidth, int minimumHeight) noexcept
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{
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jassert (maxW >= minimumWidth);
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jassert (maxH >= minimumHeight);
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jassert (minimumWidth > 0 && minimumHeight > 0);
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minW = minimumWidth;
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minH = minimumHeight;
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if (minW > maxW) maxW = minW;
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if (minH > maxH) maxH = minH;
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}
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void ComponentBoundsConstrainer::setMaximumSize (int maximumWidth, int maximumHeight) noexcept
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{
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jassert (maximumWidth >= minW);
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jassert (maximumHeight >= minH);
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jassert (maximumWidth > 0 && maximumHeight > 0);
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maxW = jmax (minW, maximumWidth);
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maxH = jmax (minH, maximumHeight);
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}
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void ComponentBoundsConstrainer::setSizeLimits (int minimumWidth,
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int minimumHeight,
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int maximumWidth,
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int maximumHeight) noexcept
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{
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jassert (maximumWidth >= minimumWidth);
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jassert (maximumHeight >= minimumHeight);
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jassert (maximumWidth > 0 && maximumHeight > 0);
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jassert (minimumWidth > 0 && minimumHeight > 0);
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minW = jmax (0, minimumWidth);
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minH = jmax (0, minimumHeight);
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maxW = jmax (minW, maximumWidth);
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maxH = jmax (minH, maximumHeight);
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}
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void ComponentBoundsConstrainer::setMinimumOnscreenAmounts (int minimumWhenOffTheTop,
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int minimumWhenOffTheLeft,
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int minimumWhenOffTheBottom,
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int minimumWhenOffTheRight) noexcept
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{
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minOffTop = minimumWhenOffTheTop;
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minOffLeft = minimumWhenOffTheLeft;
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minOffBottom = minimumWhenOffTheBottom;
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minOffRight = minimumWhenOffTheRight;
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}
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void ComponentBoundsConstrainer::setFixedAspectRatio (double widthOverHeight) noexcept
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{
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aspectRatio = jmax (0.0, widthOverHeight);
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}
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double ComponentBoundsConstrainer::getFixedAspectRatio() const noexcept
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{
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return aspectRatio;
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}
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void ComponentBoundsConstrainer::setBoundsForComponent (Component* component,
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Rectangle<int> targetBounds,
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bool isStretchingTop,
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bool isStretchingLeft,
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bool isStretchingBottom,
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bool isStretchingRight)
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{
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jassert (component != nullptr);
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Rectangle<int> limits, bounds (targetBounds);
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BorderSize<int> border;
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if (auto* parent = component->getParentComponent())
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{
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limits.setSize (parent->getWidth(), parent->getHeight());
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}
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else
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{
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if (auto* peer = component->getPeer())
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border = peer->getFrameSize();
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auto screenBounds = Desktop::getInstance().getDisplays().getDisplayForPoint (targetBounds.getCentre())->userArea;
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limits = component->getLocalArea (nullptr, screenBounds) + component->getPosition();
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}
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border.addTo (bounds);
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checkBounds (bounds,
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border.addedTo (component->getBounds()), limits,
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isStretchingTop, isStretchingLeft,
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isStretchingBottom, isStretchingRight);
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border.subtractFrom (bounds);
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applyBoundsToComponent (*component, bounds);
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}
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void ComponentBoundsConstrainer::checkComponentBounds (Component* component)
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{
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setBoundsForComponent (component, component->getBounds(),
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false, false, false, false);
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}
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void ComponentBoundsConstrainer::applyBoundsToComponent (Component& component, Rectangle<int> bounds)
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{
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if (auto* positioner = component.getPositioner())
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positioner->applyNewBounds (bounds);
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else
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component.setBounds (bounds);
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}
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//==============================================================================
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void ComponentBoundsConstrainer::resizeStart()
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{
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}
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void ComponentBoundsConstrainer::resizeEnd()
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{
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}
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//==============================================================================
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void ComponentBoundsConstrainer::checkBounds (Rectangle<int>& bounds,
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const Rectangle<int>& old,
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const Rectangle<int>& limits,
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bool isStretchingTop,
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bool isStretchingLeft,
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bool isStretchingBottom,
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bool isStretchingRight)
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{
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if (isStretchingLeft)
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bounds.setLeft (jlimit (old.getRight() - maxW, old.getRight() - minW, bounds.getX()));
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else
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bounds.setWidth (jlimit (minW, maxW, bounds.getWidth()));
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if (isStretchingTop)
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bounds.setTop (jlimit (old.getBottom() - maxH, old.getBottom() - minH, bounds.getY()));
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else
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bounds.setHeight (jlimit (minH, maxH, bounds.getHeight()));
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if (bounds.isEmpty())
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return;
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if (minOffTop > 0)
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{
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const int limit = limits.getY() + jmin (minOffTop - bounds.getHeight(), 0);
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if (bounds.getY() < limit)
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{
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if (isStretchingTop)
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bounds.setTop (limits.getY());
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else
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bounds.setY (limit);
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}
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}
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if (minOffLeft > 0)
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{
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const int limit = limits.getX() + jmin (minOffLeft - bounds.getWidth(), 0);
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if (bounds.getX() < limit)
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{
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if (isStretchingLeft)
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bounds.setLeft (limits.getX());
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else
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bounds.setX (limit);
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}
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}
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if (minOffBottom > 0)
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{
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const int limit = limits.getBottom() - jmin (minOffBottom, bounds.getHeight());
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if (bounds.getY() > limit)
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{
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if (isStretchingBottom)
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bounds.setBottom (limits.getBottom());
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else
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bounds.setY (limit);
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}
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}
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if (minOffRight > 0)
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{
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const int limit = limits.getRight() - jmin (minOffRight, bounds.getWidth());
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if (bounds.getX() > limit)
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{
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if (isStretchingRight)
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bounds.setRight (limits.getRight());
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else
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bounds.setX (limit);
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}
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}
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// constrain the aspect ratio if one has been specified..
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if (aspectRatio > 0.0)
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{
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bool adjustWidth;
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if ((isStretchingTop || isStretchingBottom) && ! (isStretchingLeft || isStretchingRight))
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{
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adjustWidth = true;
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}
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else if ((isStretchingLeft || isStretchingRight) && ! (isStretchingTop || isStretchingBottom))
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{
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adjustWidth = false;
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}
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else
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{
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const double oldRatio = (old.getHeight() > 0) ? std::abs (old.getWidth() / (double) old.getHeight()) : 0.0;
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const double newRatio = std::abs (bounds.getWidth() / (double) bounds.getHeight());
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adjustWidth = (oldRatio > newRatio);
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}
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if (adjustWidth)
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{
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bounds.setWidth (roundToInt (bounds.getHeight() * aspectRatio));
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if (bounds.getWidth() > maxW || bounds.getWidth() < minW)
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{
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bounds.setWidth (jlimit (minW, maxW, bounds.getWidth()));
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bounds.setHeight (roundToInt (bounds.getWidth() / aspectRatio));
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}
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}
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else
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{
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bounds.setHeight (roundToInt (bounds.getWidth() / aspectRatio));
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if (bounds.getHeight() > maxH || bounds.getHeight() < minH)
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{
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bounds.setHeight (jlimit (minH, maxH, bounds.getHeight()));
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bounds.setWidth (roundToInt (bounds.getHeight() * aspectRatio));
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}
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}
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if ((isStretchingTop || isStretchingBottom) && ! (isStretchingLeft || isStretchingRight))
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{
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bounds.setX (old.getX() + (old.getWidth() - bounds.getWidth()) / 2);
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}
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else if ((isStretchingLeft || isStretchingRight) && ! (isStretchingTop || isStretchingBottom))
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{
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bounds.setY (old.getY() + (old.getHeight() - bounds.getHeight()) / 2);
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}
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else
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{
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if (isStretchingLeft)
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bounds.setX (old.getRight() - bounds.getWidth());
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if (isStretchingTop)
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bounds.setY (old.getBottom() - bounds.getHeight());
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}
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}
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jassert (! bounds.isEmpty());
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}
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} // namespace juce
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