com.alee.laf.menu.PopupMenuPainter Maven / Gradle / Ivy
/*
* This file is part of WebLookAndFeel library.
*
* WebLookAndFeel library is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* WebLookAndFeel library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with WebLookAndFeel library. If not, see component type
* @param component UI type
* @author Mikle Garin
*/
public class PopupMenuPainter extends AbstractPopupPainter
implements IPopupMenuPainter
{
/**
* todo 1. Incorrect menu placement when corner is off (spacing == shade)
* todo 2. When using popupMenuWay take invoker shade into account (if its UI has one -> ShadeProvider interface)
* todo 3. Add left/right corners display support
*/
/**
* Style settings.
*/
protected int menuSpacing = 1;
protected boolean fixLocation = true;
protected boolean dropdownStyleForMenuBar = true;
/**
* Runtime variables.
*/
protected transient PopupMenuType popupMenuType = null;
@Override
protected void propertyChanged ( final String property, final Object oldValue, final Object newValue )
{
// Perform basic actions on property changes
super.propertyChanged ( property, oldValue, newValue );
// Visibility property changes
if ( Objects.equals ( property, WebLookAndFeel.VISIBLE_PROPERTY ) )
{
// Updating menu type
if ( newValue == Boolean.TRUE )
{
final Component invoker = component.getInvoker ();
if ( invoker != null )
{
if ( invoker instanceof JMenu )
{
if ( invoker.getParent () instanceof JPopupMenu )
{
setPopupMenuType ( PopupMenuType.menuBarSubMenu );
}
else
{
setPopupMenuType ( PopupMenuType.menuBarMenu );
}
}
else if ( invoker instanceof JComboBox )
{
setPopupMenuType ( PopupMenuType.comboBoxMenu );
}
else
{
setPopupMenuType ( PopupMenuType.customPopupMenu );
}
}
else
{
setPopupMenuType ( PopupMenuType.customPopupMenu );
}
}
// Either install or uninstall popup settings
if ( newValue == Boolean.TRUE )
{
// For unix systems it is not required to repeat this update
if ( !SystemUtils.isUnix () )
{
// Install custom popup window settings
installPopupSettings ( CoreSwingUtils.getWindowAncestor ( component ), component );
}
}
else
{
// Uninstall custom popup window settings
uninstallPopupSettings ( CoreSwingUtils.getWindowAncestor ( component ), component );
}
}
}
@Override
protected void orientationChange ()
{
// Performing default actions
super.orientationChange ();
// todo Probably just update location properly?
// Hiding menu on orientation changes
if ( component.isShowing () )
{
component.setVisible ( false );
}
}
/**
* Returns spacing between popup menus.
*
* @return spacing between popup menus
*/
public int getMenuSpacing ()
{
return menuSpacing;
}
/**
* Sets spacing between popup menus.
*
* @param spacing spacing between popup menus
*/
public void setMenuSpacing ( final int spacing )
{
this.menuSpacing = spacing;
}
/**
* Returns whether should fix initial popup menu location or not.
*
* @return true if should fix initial popup menu location, false otherwise
*/
public boolean isFixLocation ()
{
return fixLocation;
}
/**
* Sets whether should fix initial popup menu location or not.
* If set to true popup menu will try to use best possible location to show up.
*
* This is set to true by default to place menubar and menu popups correctly.
* You might want to set this to false for some specific popup menu, but not all of them at once.
*
* @param fix whether should fix initial popup menu location or not
*/
public void setFixLocation ( final boolean fix )
{
this.fixLocation = fix;
}
/**
* Sets popup menu type.
* This value is updated right before popup menu window becomes visible.
* You can use it to draw different popup menu decoration for each popup menu type.
*
* @param type popup menu type
*/
public void setPopupMenuType ( final PopupMenuType type )
{
this.popupMenuType = type;
if ( popupMenuType == PopupMenuType.menuBarSubMenu )
{
setPopupStyle ( PopupStyle.simple );
}
}
@Override
protected Insets getBorder ()
{
final Insets margin = super.getBorder ();
margin.top += round;
margin.bottom += round;
return margin;
}
@Override
protected void paintTransparentPopup ( final Graphics2D g2d, final C popupMenu )
{
final Dimension menuSize = popupMenu.getSize ();
// Painting shade
paintShade ( g2d, popupMenu, menuSize );
// Painting background
paintBackground ( g2d, popupMenu, menuSize );
// Painting dropdown corner fill
// This is a specific for WebPopupMenuUI feature
paintDropdownCornerFill ( g2d, popupMenu, menuSize );
// Painting border
paintBorder ( g2d, popupMenu, menuSize );
}
/**
* Paints dropdown-styled popup menu corner fill if menu item near it is selected.
*
* @param g2d graphics context
* @param popupMenu popup menu
* @param menuSize menu size
*/
protected void paintDropdownCornerFill ( final Graphics2D g2d, final C popupMenu, final Dimension menuSize )
{
// Checking whether corner should be filled or not
if ( popupStyle == PopupStyle.dropdown && round == 0 )
{
// Check that menu item is attached to menu side
final boolean top = cornerSide == TOP;
final boolean stick = top ? getBorder ().top == 0 : getBorder ().bottom == 0;
if ( stick )
{
// todo Implement corner support
// // Checking that we can actually retrieve what item wants to fill corner with
// final int zIndex = top ? 0 : popupMenu.getComponentCount () - 1;
// final Component component = popupMenu.getComponent ( zIndex );
// if ( popupMenu instanceof BasicComboPopup )
// {
// // Filling corner according to combobox preferences
// if ( component instanceof JScrollPane )
// {
// // Usually there will be a scrollpane with list as the first element
// final JScrollPane scrollPane = ( JScrollPane ) component;
// final JList list = ( JList ) scrollPane.getViewport ().getView ();
// if ( top && list.getSelectedIndex () == 0 )
// {
// // Filling top corner when first list element is selected
// final WebComboBoxUI ui = geComboBoxUI ( popupMenu );
// if ( ui != null )
// {
// g2d.setPaint ( ui.getNorthCornerFill () );
// g2d.fill ( getDropdownCornerShape ( popupMenu, menuSize, true ) );
// }
// }
// else if ( !top && list.getSelectedIndex () == list.getModel ().getSize () - 1 )
// {
// // Filling bottom corner when last list element is selected
// final WebComboBoxUI ui = geComboBoxUI ( popupMenu );
// if ( ui != null )
// {
// g2d.setPaint ( ui.getSouthCornerFill () );
// g2d.fill ( getDropdownCornerShape ( popupMenu, menuSize, true ) );
// }
// }
// }
// }
// else if ( component instanceof JMenuItem )
// {
// // Filling corner if selected menu item is placed nearby
// final JMenuItem menuItem = ( JMenuItem ) component;
// if ( menuItem.isEnabled () && ( menuItem.getModel ().isArmed () || menuItem.isSelected () ) )
// {
// // Filling corner properly
// if ( menuItem.getUI () instanceof WebMenuUI )
// {
// // Filling corner according to WebMenu styling
// final WebMenuUI ui = ( WebMenuUI ) menuItem.getUI ();
// g2d.setPaint ( top ? ui.getNorthCornerFill () : ui.getSouthCornerFill () );
// g2d.fill ( getDropdownCornerShape ( popupMenu, menuSize, true ) );
// }
// else if ( menuItem.getUI () instanceof WebMenuItemUI )
// {
// // Filling corner according to WebMenuItem styling
// final WebMenuItemUI ui = ( WebMenuItemUI ) menuItem.getUI ();
// g2d.setPaint ( top ? ui.getNorthCornerFill () : ui.getSouthCornerFill () );
// g2d.fill ( getDropdownCornerShape ( popupMenu, menuSize, true ) );
// }
// }
// }
}
}
}
/**
* Returns combobox UI for the specified combobox popup menu.
*
* @param popupMenu popup menu to retrieve combobox UI for
* @return combobox UI for the specified combobox popup menu
*/
protected WebComboBoxUI geComboBoxUI ( final C popupMenu )
{
final JComboBox comboBox = ReflectUtils.getFieldValueSafely ( popupMenu, "comboBox" );
return comboBox != null && comboBox.getUI () instanceof WebComboBoxUI ? ( WebComboBoxUI ) comboBox.getUI () : null;
}
@Override
public Point preparePopupMenu ( final C popupMenu, final Component invoker, int x, int y )
{
// Updating popup location according to popup menu UI settings
if ( invoker != null )
{
// Default corner position according to invoker's orientation
relativeCorner = ltr ? 0 : Integer.MAX_VALUE;
// Calculating position variables
final boolean showing = invoker.isShowing ();
final Point los = showing ? CoreSwingUtils.locationOnScreen ( invoker ) : new Point ( 0, 0 );
final boolean fixLocation = this.fixLocation && showing;
final int sideWidth = getSideWidth ();
// Calculating final position variables
if ( invoker instanceof JMenu )
{
if ( invoker.getParent () instanceof JPopupMenu )
{
// Displaying simple-styled sub-menu
// It is displayed to left or right of the menu item
setPopupStyle ( PopupStyle.simple );
if ( fixLocation )
{
// Invoker X-location on screen also works as orientation indicator, so we don't need to check it here
x += ( los.x <= x ? -1 : 1 ) * ( shaped ? sideWidth - menuSpacing : -menuSpacing );
y += ( los.y <= y ? -1 : 1 ) * ( shaped ? sideWidth + 1 + round : round );
}
}
else if ( !dropdownStyleForMenuBar )
{
// Displaying simple-styled top-level menu
// It is displayed below or above the menu bar
setPopupStyle ( PopupStyle.simple );
if ( fixLocation )
{
// Invoker X-location on screen also works as orientation indicator, so we don't need to check it here
x += ( los.x <= x ? -1 : 1 ) * ( shaped ? sideWidth - menuSpacing : -menuSpacing );
y -= shaped ? sideWidth + round + 1 : round;
}
}
else
{
// Displaying dropdown-styled top-level menu
// It is displayed below or above the menu bar
setPopupStyle ( PopupStyle.dropdown );
cornerSide = los.y <= y ? TOP : BOTTOM;
if ( fixLocation )
{
// Invoker X-location on screen also works as orientation indicator, so we don't need to check it here
x += ( los.x <= x ? -1 : 1 ) * ( shaped ? sideWidth : 0 );
y += ( los.y <= y ? -1 : 1 ) * ( shaped ? sideWidth - cornerWidth : 0 );
}
relativeCorner = los.x + invoker.getWidth () / 2 - x;
}
}
else
{
final boolean dropdown = popupStyle == PopupStyle.dropdown;
if ( invoker instanceof JComboBox && popupMenu.getName ().equals ( "ComboPopup.popup" ) )
{
cornerSide = los.y <= y ? TOP : BOTTOM;
if ( fixLocation )
{
x += shaped ? -sideWidth : 0;
if ( cornerSide == TOP )
{
y -= shaped ? sideWidth - ( dropdown ? cornerWidth : 0 ) : 0;
}
else
{
// Invoker preferred size is required instead of actual height
// This is because the original position takes it into account instead of height
final int ih = invoker.getPreferredSize ().height;
y -= ih + ( shaped ? sideWidth - ( dropdown ? cornerWidth : 0 ) : 0 );
}
}
relativeCorner = los.x + invoker.getWidth () / 2 - x;
}
else
{
if ( fixLocation )
{
// Applying new location according to specified popup menu way
final PopupMenuWay popupMenuWay = ui.getPopupMenuWay ();
if ( popupMenuWay != null )
{
final Dimension ps = popupMenu.getPreferredSize ();
final Dimension is = invoker.getSize ();
final int cornerShear = dropdown ? sideWidth - cornerWidth : 0;
switch ( popupMenuWay )
{
case aboveStart:
{
x = ( ltr ? los.x : los.x + is.width - ps.width ) + ( shaped ? ltr ? -sideWidth : sideWidth : 0 );
y = los.y - ps.height + cornerShear;
relativeCorner = ltr ? 0 : Integer.MAX_VALUE;
break;
}
case aboveMiddle:
{
x = los.x + is.width / 2 - ps.width / 2;
y = los.y - ps.height + cornerShear;
relativeCorner = los.x + invoker.getWidth () / 2 - x;
break;
}
case aboveEnd:
{
x = ( ltr ? los.x + is.width - ps.width : los.x ) + ( shaped ? ltr ? sideWidth : -sideWidth : 0 );
y = los.y - ps.height + cornerShear;
relativeCorner = ltr ? Integer.MAX_VALUE : 0;
break;
}
case belowStart:
{
x = ( ltr ? los.x : los.x + is.width - ps.width ) + ( shaped ? ltr ? -sideWidth : sideWidth : 0 );
y = los.y + is.height - cornerShear;
relativeCorner = ltr ? 0 : Integer.MAX_VALUE;
break;
}
case belowMiddle:
{
x = los.x + is.width / 2 - ps.width / 2;
y = los.y + is.height - cornerShear;
relativeCorner = los.x + invoker.getWidth () / 2 - x;
break;
}
case belowEnd:
{
x = ( ltr ? los.x + is.width - ps.width : los.x ) + ( shaped ? ltr ? sideWidth : -sideWidth : 0 );
y = los.y + is.height - cornerShear;
relativeCorner = ltr ? Integer.MAX_VALUE : 0;
break;
}
}
cornerSide = popupMenuWay.getCornerSide ();
}
}
}
}
}
else
{
// Default corner position
relativeCorner = 0;
}
return new Point ( x, y );
}
@Override
public void configurePopup ( final C popupMenu, final Component invoker, final int x, final int y, final Popup popup )
{
// Retrieve component directly from the popup
final Component window = ReflectUtils.callMethodSafely ( popup, "getComponent" );
if ( window instanceof Window )
{
// Install custom popup window settings
installPopupSettings ( ( Window ) window, popupMenu );
}
}
/**
* Configures popup menu window opacity and shape.
*
* @param window popup menu window
* @param popupMenu popup menu
*/
protected void installPopupSettings ( final Window window, final C popupMenu )
{
if ( window != null && shaped && SwingUtils.isHeavyWeightWindow ( window ) )
{
// Workaround to remove Mac OS X shade around the window
if ( window instanceof JWindow && SystemUtils.isMac () )
{
( ( JWindow ) window ).getRootPane ().putClientProperty ( "Window.shadow", Boolean.FALSE );
}
// Updating window opacity state in case menu is displayed in a heavy-weight popup
if ( SwingUtils.isHeavyWeightWindow ( window ) )
{
// Either change window opacity or shape if it is possible
if ( ProprietaryUtils.isWindowTransparencyAllowed () )
{
// Change window opacity
ProprietaryUtils.setWindowOpaque ( window, false );
}
else if ( ProprietaryUtils.isWindowShapeAllowed () )
{
// Change window shape
window.pack ();
final Rectangle bounds = window.getBounds ();
++bounds.width;
++bounds.height;
final Shape shape = provideShape ( popupMenu, bounds );
ProprietaryUtils.setWindowShape ( window, shape );
}
}
}
}
/**
* Unconfigures popup menu window opacity and shape.
*
* @param window popup menu window
* @param popupMenu popup menu
*/
protected void uninstallPopupSettings ( final Window window, final C popupMenu )
{
if ( window != null && shaped && SwingUtils.isHeavyWeightWindow ( window ) )
{
// Restoring menu opacity state in case menu is in a separate heavy-weight window
ProprietaryUtils.setWindowOpaque ( window, true );
ProprietaryUtils.setWindowShape ( window, null );
}
}
}