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86 lines
1.9 KiB
86 lines
1.9 KiB
package mightypork.gamecore.gui.components.layout;
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import mightypork.gamecore.gui.components.Component;
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import mightypork.gamecore.gui.components.LayoutComponent;
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import mightypork.utils.math.AlignY;
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import mightypork.utils.math.constraints.num.Num;
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import mightypork.utils.math.constraints.rect.Rect;
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import mightypork.utils.math.constraints.rect.RectBound;
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/**
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* Holder with same-sized rows, aligned to top or bottom
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*
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* @author Ondřej Hruška (MightyPork)
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*/
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public class FlowRowLayout extends LayoutComponent {
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private int row = 0;
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private Num elementHeight;
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private final AlignY align;
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/**
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* @param context context
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* @param elementHeight height of all elements
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* @param align component align. Legal values are TOP and BOTTOM.
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*/
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public FlowRowLayout(RectBound context, Num elementHeight, AlignY align)
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{
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super(context);
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this.elementHeight = elementHeight;
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this.align = align;
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if (align != AlignY.TOP && align != AlignY.BOTTOM) {
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throw new IllegalArgumentException("Can align only to top or bottom.");
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}
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}
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/**
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* make a new holder.<br>
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* Context must be assigned before rendering.
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*
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* @param elementHeight height of all elements
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* @param align component align. Legal values are TOP and BOTTOM.
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*/
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public FlowRowLayout(Num elementHeight, AlignY align)
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{
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this(null, elementHeight, align);
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}
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/**
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* Add an item
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*
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* @param elem
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*/
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public void add(final Component elem)
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{
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if (elem == null) return;
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final Rect r;
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switch (align) {
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case TOP:
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r = topEdge().growDown(elementHeight).moveY(elementHeight.mul(row++));
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break;
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case BOTTOM:
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r = bottomEdge().growUp(elementHeight).moveY(elementHeight.mul(-(row++)));
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break;
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default:
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throw new IllegalArgumentException("Bad align.");
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}
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elem.setRect(r);
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attach(elem);
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}
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public void setElementHeight(Num elementHeight)
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{
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this.elementHeight = elementHeight;
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}
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}
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