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87 lines
1.9 KiB
87 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.AlignX;
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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 columns, aligned to left or right
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*
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* @author Ondřej Hruška (MightyPork)
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*/
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public class FlowColumnLayout extends LayoutComponent {
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private int col = 0;
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private Num elementWidth;
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private final AlignX align;
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/**
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* @param context context
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* @param elementWidth width of all elements
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* @param align component align. Legal values are LEFT and RIGHT.
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*/
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public FlowColumnLayout(RectBound context, Num elementWidth, AlignX align)
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{
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super(context);
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this.elementWidth = elementWidth;
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this.align = align;
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if (align != AlignX.LEFT && align != AlignX.RIGHT) {
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throw new IllegalArgumentException("Can align only left or right.");
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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 elementWidth width of all elements
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* @param align component align. Legal values are LEFT and RIGHT.
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*/
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public FlowColumnLayout(Num elementWidth, AlignX align)
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{
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this(null, elementWidth, 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 LEFT:
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r = leftEdge().growRight(elementWidth).moveX(elementWidth.mul(col++));
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break;
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case RIGHT:
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r = rightEdge().growLeft(elementWidth).moveX(elementWidth.mul(-(col++)));
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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 setElementWidth(Num elementWidth)
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{
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this.elementWidth = elementWidth;
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}
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}
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