101 lines
3.8 KiB
C
101 lines
3.8 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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//==============================================================================
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/**
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A component that resizes its parent component when dragged.
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This component forms a bar along one edge of a component, allowing it to
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be dragged by that edges to resize it.
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To use it, just add it to your component, positioning it along the appropriate
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edge. Make sure you reposition the resizer component each time the parent's size
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changes, to keep it in the correct position.
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@see ResizableBorderComponent, ResizableCornerComponent
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@tags{GUI}
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*/
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class JUCE_API ResizableEdgeComponent : public Component
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{
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public:
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//==============================================================================
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enum Edge
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{
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leftEdge, /**< Indicates a vertical bar that can be dragged left/right to move the component's left-hand edge. */
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rightEdge, /**< Indicates a vertical bar that can be dragged left/right to move the component's right-hand edge. */
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topEdge, /**< Indicates a horizontal bar that can be dragged up/down to move the top of the component. */
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bottomEdge /**< Indicates a horizontal bar that can be dragged up/down to move the bottom of the component. */
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};
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/** Creates a resizer bar.
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Pass in the target component which you want to be resized when this one is
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dragged. The target component will usually be this component's parent, but this
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isn't mandatory.
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Remember that when the target component is resized, it'll need to move and
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resize this component to keep it in place, as this won't happen automatically.
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If the constrainer parameter is not a nullptr, then this object will be used to
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enforce limits on the size and position that the component can be stretched to.
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Make sure that the constrainer isn't deleted while still in use by this object.
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@see ComponentBoundsConstrainer
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*/
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ResizableEdgeComponent (Component* componentToResize,
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ComponentBoundsConstrainer* constrainer,
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Edge edgeToResize);
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/** Destructor. */
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~ResizableEdgeComponent() override;
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bool isVertical() const noexcept;
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protected:
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//==============================================================================
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/** @internal */
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void paint (Graphics&) override;
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/** @internal */
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void mouseDown (const MouseEvent&) override;
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/** @internal */
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void mouseDrag (const MouseEvent&) override;
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/** @internal */
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void mouseUp (const MouseEvent&) override;
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private:
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WeakReference<Component> component;
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ComponentBoundsConstrainer* constrainer;
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Rectangle<int> originalBounds;
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const Edge edge;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ResizableEdgeComponent)
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};
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} // namespace juce
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