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62 lines
2.6 KiB
62 lines
2.6 KiB
11 years ago
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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) 2013 - Raw Material Software Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found 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.juce.com 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->getLocalPoint (nullptr, e.source.getScreenPosition()) - 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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