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62 lines
2.8 KiB
C++
62 lines
2.8 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library - "Jules' Utility Class Extensions"
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Copyright 2004-11 by Raw Material Software Ltd.
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------------------------------------------------------------------------------
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JUCE can be redistributed and/or modified under the terms of the GNU General
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Public License (Version 2), as published by the Free Software Foundation.
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A copy of the license is included in the JUCE distribution, or can be found
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online at www.gnu.org/licenses.
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.rawmaterialsoftware.com/juce for more information.
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==============================================================================
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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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Rectangle<int> 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->getMouseXYRelative() - 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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