Example #1
0
 private void computeSize(Array<Node> nodes, float indent) {
   float ySpacing = this.ySpacing;
   for (int i = 0, n = nodes.size; i < n; i++) {
     Node node = nodes.get(i);
     float rowWidth = indent + iconSpacing;
     Actor actor = node.actor;
     if (actor instanceof Layout) {
       Layout layout = (Layout) actor;
       rowWidth += layout.getPrefWidth();
       node.height = layout.getPrefHeight();
       layout.pack();
     } else {
       rowWidth += actor.getWidth();
       node.height = actor.getHeight();
     }
     if (node.icon != null) {
       rowWidth += iconSpacing * 2 + node.icon.getMinWidth();
       node.height = Math.max(node.height, node.icon.getMinHeight());
     }
     prefWidth = Math.max(prefWidth, rowWidth);
     prefHeight -= node.height + ySpacing;
     if (node.expanded) computeSize(node.children, indent + indentSpacing);
   }
 }
Example #2
0
  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();
    }

    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 = forceScrollX || (widgetWidth > areaWidth && !disableX);
    scrollY = forceScrollY || (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) {
          if (hScrollOnBottom) {
            widgetAreaBounds.y += scrollbarHeight;
          } else {
            widgetAreaBounds.y = 0;
          }
        }
        // Offset widget area x for vertical scrollbar.
        if (scrollY) {
          if (vScrollOnRight) {
            widgetAreaBounds.x = 0;
          } else {
            widgetAreaBounds.x += scrollbarWidth;
          }
        }
      }
    }

    // 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;
    }
    scrollX(MathUtils.clamp(amountX, 0, maxX));
    scrollY(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();
        // the small gap where the two scroll bars intersect might have to flip from right to left
        float boundsX, boundsY;
        if (vScrollOnRight) {
          boundsX = bgLeftWidth;
        } else {
          boundsX = bgLeftWidth + scrollbarWidth;
        }
        // bar on the top or bottom
        if (hScrollOnBottom) {
          boundsY = bgBottomHeight;
        } else {
          boundsY = height - bgTopHeight - hScrollHeight;
        }
        hScrollBounds.set(boundsX, boundsY, areaWidth, hScrollHeight);
        hKnobBounds.width =
            Math.max(
                hScrollKnob.getMinWidth(), (int) (hScrollBounds.width * areaWidth / widgetWidth));
        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();
        // the small gap where the two scroll bars intersect might have to flip from bottom to top
        float boundsX, boundsY;
        if (hScrollOnBottom) {
          boundsY = height - bgTopHeight - areaHeight;
        } else {
          boundsY = bgBottomHeight;
        }
        // bar on the left or right
        if (vScrollOnRight) {
          boundsX = width - bgRightWidth - vScrollWidth;
        } else {
          boundsX = bgLeftWidth;
        }
        vScrollBounds.set(boundsX, boundsY, vScrollWidth, areaHeight);
        vKnobBounds.width = vScrollKnob.getMinWidth();
        vKnobBounds.height =
            Math.max(
                vScrollKnob.getMinHeight(),
                (int) (vScrollBounds.height * areaHeight / widgetHeight));
        if (vScrollOnRight) {
          vKnobBounds.x = width - bgRightWidth - vScrollKnob.getMinWidth();
        } else {
          vKnobBounds.x = bgLeftWidth;
        }
        vKnobBounds.y =
            vScrollBounds.y
                + (int) ((vScrollBounds.height - vKnobBounds.height) * (1 - getScrollPercentY()));
      } else {
        vScrollBounds.set(0, 0, 0, 0);
        vKnobBounds.set(0, 0, 0, 0);
      }
    }

    widget.setSize(widgetWidth, widgetHeight);
    if (widget instanceof Layout) ((Layout) widget).validate();
  }