Java 类com.intellij.ui.components.JBViewport 实例源码

private void paintOnComponentUnderViewport(Component component, Graphics g) {
  JBViewport viewport = ObjectUtils.tryCast(myOwner, JBViewport.class);
  if (viewport == null || viewport.getView() != component || viewport.isPaintingNow()) return;

  // We're painting a component which has a viewport as it's ancestor.
  // As the viewport paints status text, we'll erase it, so we need to schedule a repaint for the viewport with status text's bounds.
  // But it causes flicker, so we paint status text over the component first and then schedule the viewport repaint.

  Rectangle textBoundsInViewport = getTextComponentBound();

  int xInOwner = textBoundsInViewport.x - component.getX();
  int yInOwner = textBoundsInViewport.y - component.getY();
  Rectangle textBoundsInOwner = new Rectangle(xInOwner, yInOwner, textBoundsInViewport.width, textBoundsInViewport.height);
  doPaintStatusText(g, textBoundsInOwner);

  viewport.repaint(textBoundsInViewport);
}

private void paintOnComponentUnderViewport(Component component, Graphics g) {
  JBViewport viewport = ObjectUtils.tryCast(myOwner, JBViewport.class);
  if (viewport == null || viewport.getView() != component || viewport.isPaintingNow()) return;

  // We're painting a component which has a viewport as it's ancestor.
  // As the viewport paints status text, we'll erase it, so we need to schedule a repaint for the viewport with status text's bounds.
  // But it causes flicker, so we paint status text over the component first and then schedule the viewport repaint.

  Rectangle textBoundsInViewport = getTextComponentBound();

  int xInOwner = textBoundsInViewport.x - component.getX();
  int yInOwner = textBoundsInViewport.y - component.getY();
  Rectangle textBoundsInOwner = new Rectangle(xInOwner, yInOwner, textBoundsInViewport.width, textBoundsInViewport.height);
  doPaintStatusText(g, textBoundsInOwner);

  viewport.repaint(textBoundsInViewport);
}

private void paintOnComponentUnderViewport(Component component, Graphics g) {
  JBViewport viewport = ObjectUtils.tryCast(myOwner, JBViewport.class);
  if (viewport == null || viewport.getView() != component || viewport.isPaintingNow()) return;

  // We're painting a component which has a viewport as it's ancestor.
  // As the viewport paints status text, we'll erase it, so we need to schedule a repaint for the viewport with status text's bounds.
  // But it causes flicker, so we paint status text over the component first and then schedule the viewport repaint.

  Rectangle textBoundsInViewport = getTextComponentBound();

  int xInOwner = textBoundsInViewport.x - component.getX();
  int yInOwner = textBoundsInViewport.y - component.getY();
  Rectangle textBoundsInOwner = new Rectangle(xInOwner, yInOwner, textBoundsInViewport.width, textBoundsInViewport.height);
  doPaintStatusText(g, textBoundsInOwner);

  viewport.repaint(textBoundsInViewport);
}

private MyListWrapper(final JList list) {
  super(UIUtil.isUnderAquaLookAndFeel() ? 0 : -1);
  JBViewport viewport = new JBViewport() {
    @Override
    protected LayoutManager createLayoutManager() {
      return new ViewportLayout() {
        @Override
        public Dimension preferredLayoutSize(Container parent) {
          int size = list.getModel().getSize();
          if (size >= 0 && size <= 20) {
            return list.getPreferredSize();
          } else {
            final Dimension sz = super.preferredLayoutSize(parent);
            final Point p = RelativePoint.getNorthWestOf(myList).getScreenPoint();
            final Rectangle screen = ScreenUtil.getScreenRectangle(p);

            final int bordersEtc = 20;
            final int maxWidth = Math.abs(screen.x + screen.width - p.x) - 2 * bordersEtc;
            return new Dimension(Math.min(maxWidth, sz.width) + bordersEtc, sz.height + list.getCellBounds(0, 0).height / 2);
          }
        }
      };
    }
  };
  list.setVisibleRowCount(15);
  setViewport(viewport);
  setViewportView(list);


  if (myAutoselectOnMouseMove) {
    ListUtil.installAutoSelectOnMouseMove(list);
  }

  ScrollingUtil.installActions(list);

  setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 0));
  myList = list;
}

private void repaintViewport() {
  if (!isDisplayable() || !isVisible()) return;

  Container p = getParent();
  if (p instanceof JBViewport) {
    p.repaint();
  }
}

private void repaintViewport() {
  if (!isDisplayable() || !isVisible()) return;

  Container p = getParent();
  if (p instanceof JBViewport) {
    p.repaint();
  }
}

private void repaintViewport() {
  if (!isDisplayable() || !isVisible()) return;

  Container p = getParent();
  if (p instanceof JBViewport) {
    p.repaint();
  }
}

private MyListWrapper(final JList list) {
  super(UIUtil.isUnderAquaLookAndFeel() ? 0 : -1);
  JBViewport viewport = new JBViewport() {
    @Override
    protected LayoutManager createLayoutManager() {
      return new ViewportLayout() {
        @Override
        public Dimension preferredLayoutSize(Container parent) {
          int size = list.getModel().getSize();
          if (size >= 0 && size <= 20) {
            return list.getPreferredSize();
          } else {
            final Dimension sz = super.preferredLayoutSize(parent);
            final Point p = RelativePoint.getNorthWestOf(myList).getScreenPoint();
            final Rectangle screen = ScreenUtil.getScreenRectangle(p);

            final int bordersEtc = 20;
            final int maxWidth = Math.abs(screen.x + screen.width - p.x) - 2 * bordersEtc;
            return new Dimension(Math.min(maxWidth, sz.width) + bordersEtc, sz.height + list.getCellBounds(0, 0).height / 2);
          }
        }
      };
    }
  };
  list.setVisibleRowCount(15);
  setViewport(viewport);
  setViewportView(list);


  if (myAutoselectOnMouseMove) {
    list.addMouseMotionListener(new MouseMotionAdapter() {
      boolean myIsEngaged = false;
      public void mouseMoved(MouseEvent e) {
        if (myIsEngaged && !UIUtil.isSelectionButtonDown(e)) {
          Point point = e.getPoint();
          int index = list.locationToIndex(point);
          list.putClientProperty(SELECTED_BY_MOUSE_EVENT, Boolean.TRUE);
          list.setSelectedIndex(index);
          list.putClientProperty(SELECTED_BY_MOUSE_EVENT, Boolean.FALSE);
        }
        else {
          myIsEngaged = true;
        }
      }
    });
  }

  ListScrollingUtil.installActions(list);

  setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 0));
  myList = list;
}