156 lines
5.8 KiB
C++
156 lines
5.8 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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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 5 End-User License
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Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
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27th April 2017).
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End User License Agreement: www.juce.com/juce-5-licence
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Privacy Policy: www.juce.com/juce-5-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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Specifies a set of gaps to be left around the sides of a rectangle.
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This is basically the size of the spaces at the top, bottom, left and right of
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a rectangle. It's used by various component classes to specify borders.
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@see Rectangle
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@tags{Graphics}
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*/
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template <typename ValueType>
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class BorderSize
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{
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public:
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//==============================================================================
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/** Creates a null border.
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All sizes are left as 0.
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*/
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BorderSize() noexcept
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: top(), left(), bottom(), right()
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{
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}
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/** Creates a copy of another border. */
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BorderSize (const BorderSize& other) noexcept
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: top (other.top), left (other.left), bottom (other.bottom), right (other.right)
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{
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}
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/** Creates a border with the given gaps. */
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BorderSize (ValueType topGap, ValueType leftGap, ValueType bottomGap, ValueType rightGap) noexcept
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: top (topGap), left (leftGap), bottom (bottomGap), right (rightGap)
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{
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}
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/** Creates a border with the given gap on all sides. */
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explicit BorderSize (ValueType allGaps) noexcept
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: top (allGaps), left (allGaps), bottom (allGaps), right (allGaps)
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{
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}
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//==============================================================================
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/** Returns the gap that should be left at the top of the region. */
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ValueType getTop() const noexcept { return top; }
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/** Returns the gap that should be left at the top of the region. */
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ValueType getLeft() const noexcept { return left; }
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/** Returns the gap that should be left at the top of the region. */
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ValueType getBottom() const noexcept { return bottom; }
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/** Returns the gap that should be left at the top of the region. */
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ValueType getRight() const noexcept { return right; }
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/** Returns the sum of the top and bottom gaps. */
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ValueType getTopAndBottom() const noexcept { return top + bottom; }
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/** Returns the sum of the left and right gaps. */
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ValueType getLeftAndRight() const noexcept { return left + right; }
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/** Returns true if this border has no thickness along any edge. */
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bool isEmpty() const noexcept { return left + right + top + bottom == ValueType(); }
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//==============================================================================
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/** Changes the top gap. */
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void setTop (ValueType newTopGap) noexcept { top = newTopGap; }
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/** Changes the left gap. */
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void setLeft (ValueType newLeftGap) noexcept { left = newLeftGap; }
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/** Changes the bottom gap. */
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void setBottom (ValueType newBottomGap) noexcept { bottom = newBottomGap; }
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/** Changes the right gap. */
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void setRight (ValueType newRightGap) noexcept { right = newRightGap; }
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//==============================================================================
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/** Returns a rectangle with these borders removed from it. */
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Rectangle<ValueType> subtractedFrom (const Rectangle<ValueType>& original) const noexcept
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{
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return Rectangle<ValueType> (original.getX() + left,
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original.getY() + top,
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original.getWidth() - (left + right),
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original.getHeight() - (top + bottom));
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}
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/** Removes this border from a given rectangle. */
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void subtractFrom (Rectangle<ValueType>& rectangle) const noexcept
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{
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rectangle = subtractedFrom (rectangle);
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}
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/** Returns a rectangle with these borders added around it. */
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Rectangle<ValueType> addedTo (const Rectangle<ValueType>& original) const noexcept
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{
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return Rectangle<ValueType> (original.getX() - left,
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original.getY() - top,
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original.getWidth() + (left + right),
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original.getHeight() + (top + bottom));
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}
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/** Adds this border around a given rectangle. */
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void addTo (Rectangle<ValueType>& rectangle) const noexcept
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{
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rectangle = addedTo (rectangle);
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}
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//==============================================================================
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bool operator== (const BorderSize& other) const noexcept
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{
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return top == other.top && left == other.left && bottom == other.bottom && right == other.right;
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}
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bool operator!= (const BorderSize& other) const noexcept
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{
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return ! operator== (other);
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}
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private:
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//==============================================================================
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ValueType top, left, bottom, right;
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};
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} // namespace juce
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