Example usage for com.badlogic.gdx.scenes.scene2d.utils Layout validate

Introduction

In this page you can find the example usage for com.badlogic.gdx.scenes.scene2d.utils Layout validate.

Prototype

public void validate();

Source Link

Document

Ensures the actor has been laid out.

Usage

From source file:com.anstrat.gui.SnapScrollPane.java

License:Apache License

public void layout() {
    final Drawable bg = style.background;
    final Drawable hScrollKnob = style.hScrollKnob;
    final Drawable vScrollKnob = style.vScrollKnob;

    float bgLeftWidth = 0, bgRightWidth = 0, bgTopHeight = 0, bgBottomHeight = 0;
    if (bg != null) {
        bgLeftWidth = bg.getLeftWidth();
        bgRightWidth = bg.getRightWidth();
        bgTopHeight = bg.getTopHeight();
        bgBottomHeight = bg.getBottomHeight();
    }/*from   w  w w .  j av a2s.c  o  m*/

    float width = getWidth();
    float height = getHeight();

    float scrollbarHeight = 0;
    if (hScrollKnob != null)
        scrollbarHeight = hScrollKnob.getMinHeight();
    if (style.hScroll != null)
        scrollbarHeight = Math.max(scrollbarHeight, style.hScroll.getMinHeight());
    float scrollbarWidth = 0;
    if (vScrollKnob != null)
        scrollbarWidth = vScrollKnob.getMinWidth();
    if (style.vScroll != null)
        scrollbarWidth = Math.max(scrollbarWidth, style.vScroll.getMinWidth());

    // Get available space size by subtracting background's padded area.
    areaWidth = width - bgLeftWidth - bgRightWidth;
    areaHeight = height - bgTopHeight - bgBottomHeight;

    if (widget == null)
        return;

    // Get widget's desired width.
    float widgetWidth, widgetHeight;
    if (widget instanceof Layout) {
        Layout layout = (Layout) widget;
        widgetWidth = layout.getPrefWidth();
        widgetHeight = layout.getPrefHeight();
    } else {
        widgetWidth = widget.getWidth();
        widgetHeight = widget.getHeight();
    }

    // Determine if horizontal/vertical scrollbars are needed.
    scrollX = forceOverscrollX || (widgetWidth > areaWidth && !disableX);
    scrollY = forceOverscrollY || (widgetHeight > areaHeight && !disableY);

    boolean fade = fadeScrollBars;
    if (!fade) {
        // Check again, now taking into account the area that's taken up by any enabled scrollbars.
        if (scrollY) {
            areaWidth -= scrollbarWidth;
            if (!scrollX && widgetWidth > areaWidth && !disableX) {
                scrollX = true;
            }
        }
        if (scrollX) {
            areaHeight -= scrollbarHeight;
            if (!scrollY && widgetHeight > areaHeight && !disableY) {
                scrollY = true;
                areaWidth -= scrollbarWidth;
            }
        }
    }

    // Set the widget area bounds.
    widgetAreaBounds.set(bgLeftWidth, bgBottomHeight, areaWidth, areaHeight);

    if (fade) {
        // Make sure widget is drawn under fading scrollbars.
        if (scrollX)
            areaHeight -= scrollbarHeight;
        if (scrollY)
            areaWidth -= scrollbarWidth;
    } else {
        if (scrollbarsOnTop) {
            // Make sure widget is drawn under non-fading scrollbars.
            if (scrollX)
                widgetAreaBounds.height += scrollbarHeight;
            if (scrollY)
                widgetAreaBounds.width += scrollbarWidth;
        } else {
            // Offset widget area y for horizontal scrollbar.
            if (scrollX)
                widgetAreaBounds.y += scrollbarHeight;
        }
    }

    // If the widget is smaller than the available space, make it take up the available space.
    widgetWidth = disableX ? width : Math.max(areaWidth, widgetWidth);
    widgetHeight = disableY ? height : Math.max(areaHeight, widgetHeight);

    maxX = widgetWidth - areaWidth;
    maxY = widgetHeight - areaHeight;
    if (fade) {
        // Make sure widget is drawn under fading scrollbars.
        if (scrollX)
            maxY -= scrollbarHeight;
        if (scrollY)
            maxX -= scrollbarWidth;
    }
    amountX = MathUtils.clamp(amountX, 0, maxX);
    amountY = MathUtils.clamp(amountY, 0, maxY);

    // Set the bounds and scroll knob sizes if scrollbars are needed.
    if (scrollX) {
        if (hScrollKnob != null) {
            float hScrollHeight = style.hScroll != null ? style.hScroll.getMinHeight()
                    : hScrollKnob.getMinHeight();
            hScrollBounds.set(bgLeftWidth, bgBottomHeight, areaWidth, hScrollHeight);
            hKnobBounds.width = Math.max(hScrollKnob.getMinWidth(),
                    (int) (hScrollBounds.width * areaWidth / widget.getWidth()));
            hKnobBounds.height = hScrollKnob.getMinHeight();
            hKnobBounds.x = hScrollBounds.x
                    + (int) ((hScrollBounds.width - hKnobBounds.width) * getScrollPercentX());
            hKnobBounds.y = hScrollBounds.y;
        } else {
            hScrollBounds.set(0, 0, 0, 0);
            hKnobBounds.set(0, 0, 0, 0);
        }
    }
    if (scrollY) {
        if (vScrollKnob != null) {
            float vScrollWidth = style.vScroll != null ? style.vScroll.getMinWidth()
                    : vScrollKnob.getMinWidth();
            vScrollBounds.set(width - bgRightWidth - vScrollWidth, height - bgTopHeight - areaHeight,
                    vScrollWidth, areaHeight);
            vKnobBounds.width = vScrollKnob.getMinWidth();
            vKnobBounds.height = Math.max(vScrollKnob.getMinHeight(),
                    (int) (vScrollBounds.height * areaHeight / widgetHeight));
            vKnobBounds.x = width - bgRightWidth - vScrollKnob.getMinWidth();
            vKnobBounds.y = vScrollBounds.y
                    + (int) ((vScrollBounds.height - vKnobBounds.height) * (1 - getScrollPercentY()));
        } else {
            vScrollBounds.set(0, 0, 0, 0);
            vKnobBounds.set(0, 0, 0, 0);
        }
    }

    if (widget.getWidth() != widgetWidth || widget.getHeight() != widgetHeight) {
        widget.setWidth(widgetWidth);
        widget.setHeight(widgetHeight);
        if (widget instanceof Layout) {
            Layout layout = (Layout) widget;
            layout.invalidate();
            layout.validate();
        }
    } else {
        if (widget instanceof Layout)
            ((Layout) widget).validate();
    }
}

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From source file:net.dermetfan.gdx.scenes.scene2d.ui.CircularGroup.java

License:Apache License

@Override
public void layout() {
    float prefWidthUnderflow = shrinkChildren ? Math.max(0, getPrefWidth() - getWidth()) / 2 : 0,
            prefHeightUnderflow = shrinkChildren ? Math.max(0, getPrefHeight() - getHeight()) / 2 : 0;
    SnapshotArray<Actor> children = getChildren();
    for (int index = 0; index < children.size; index++) {
        Actor child = children.get(index);

        // get dimensions and resize
        float width, height;
        if (child instanceof Layout) {
            Layout childLayout = (Layout) child;
            width = childLayout.getPrefWidth() - prefWidthUnderflow;
            width = Math.max(width, childLayout.getMinWidth());
            if (childLayout.getMaxWidth() != 0)
                width = Math.min(width, childLayout.getMaxWidth());
            height = childLayout.getPrefHeight() - prefHeightUnderflow;
            height = Math.max(height, childLayout.getMinHeight());
            if (childLayout.getMaxHeight() != 0)
                height = Math.min(height, childLayout.getMaxHeight());
            child.setSize(width, height);
            childLayout.validate();
        } else {/*from ww  w  .j  av a2  s  .co m*/
            width = child.getWidth();
            height = child.getHeight();
        }

        float angle = fullAngle / (children.size - (virtualChildEnabled ? 0 : 1)) * index;
        angle += angleOffset;
        angle = modifier.angle(angle, child, index, children.size, this);

        float rotation = modifier.rotation(angle, child, index, children.size, this);

        tmp.set(modifier.anchorOffset(tmp.setZero(), child, index, children.size, this));
        tmp.rotate(angle);
        float offsetX = tmp.x, offsetY = tmp.y;

        tmp.set(modifier.localAnchor(tmp.set(width, height / 2), child, index, children.size, this));
        float localAnchorX = tmp.x, localAnchorY = tmp.y;

        child.setOrigin(localAnchorX, localAnchorY);
        child.setRotation(rotation);
        child.setPosition(getWidth() / 2 + offsetX - localAnchorX, getHeight() / 2 + offsetY - localAnchorY);
    }
}

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