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https://github.com/juce-framework/JUCE.git
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76 lines
3.3 KiB
C++
76 lines
3.3 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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ComponentDragger::ComponentDragger() {}
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ComponentDragger::~ComponentDragger() {}
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//==============================================================================
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void ComponentDragger::startDraggingComponent (Component* const componentToDrag, const MouseEvent& e)
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{
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jassert (componentToDrag != nullptr);
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jassert (e.mods.isAnyMouseButtonDown()); // The event has to be a drag event!
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if (componentToDrag != nullptr)
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mouseDownWithinTarget = e.getEventRelativeTo (componentToDrag).getMouseDownPosition();
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}
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void ComponentDragger::dragComponent (Component* const componentToDrag, const MouseEvent& e,
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ComponentBoundsConstrainer* const constrainer)
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{
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jassert (componentToDrag != nullptr);
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jassert (e.mods.isAnyMouseButtonDown()); // The event has to be a drag event!
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if (componentToDrag != nullptr)
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{
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auto bounds = componentToDrag->getBounds();
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// If the component is a window, multiple mouse events can get queued while it's in the same position,
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// so their coordinates become wrong after the first one moves the window, so in that case, we'll use
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// the current mouse position instead of the one that the event contains...
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if (componentToDrag->isOnDesktop())
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bounds += componentToDrag->getLocalPoint (nullptr, e.source.getScreenPosition()).roundToInt() - mouseDownWithinTarget;
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else
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bounds += e.getEventRelativeTo (componentToDrag).getPosition() - mouseDownWithinTarget;
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if (constrainer != nullptr)
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constrainer->setBoundsForComponent (componentToDrag, bounds, false, false, false, false);
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else
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componentToDrag->setBounds (bounds);
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}
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}
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} // namespace juce
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