DesktopManager (Java SE 15 & JDK 15) (original) (raw)

All Known Implementing Classes:

[DefaultDesktopManager](DefaultDesktopManager.html "class in javax.swing")

public interface DesktopManager

DesktopManager objects are owned by a JDesktopPane object. They are responsible for implementing L&F specific behaviors for the JDesktopPane. JInternalFrame implementations should delegate specific behaviors to the DesktopManager. For instance, if a JInternalFrame was asked to iconify, it should try:

getDesktopPane().getDesktopManager().iconifyFrame(frame);

This delegation allows each L&F to provide custom behaviors for desktop-specific actions. (For example, how and where the internal frame's icon would appear.)

This class provides a policy for the various JInternalFrame methods, it is not meant to be called directly rather the various JInternalFrame methods will call into the DesktopManager.

Since:

1.2

See Also:

JDesktopPane, JInternalFrame, JInternalFrame.JDesktopIcon

• Method Summary

• Method Details

  • openFrame

  If possible, display this frame in an appropriate location. Normally, this is not called, as the creator of the JInternalFrame will add the frame to the appropriate parent.
  Parameters:
  f - the JInternalFrame to be displayed

  • closeFrame

  Generally, this call should remove the frame from its parent.
  Parameters:
  f - the JInternalFrame to be removed

  • maximizeFrame

  Generally, the frame should be resized to match its parents bounds.
  Parameters:
  f - the JInternalFrame to be resized

  • minimizeFrame

  Generally, this indicates that the frame should be restored to its size and position prior to a maximizeFrame() call.
  Parameters:
  f - the JInternalFrame to be restored

  • iconifyFrame

  Generally, remove this frame from its parent and add an iconic representation.
  Parameters:
  f - the JInternalFrame to be iconified

  • deiconifyFrame

  Generally, remove any iconic representation that is present and restore the frame to it's original size and location.
  Parameters:
  f - the JInternalFrame to be de-iconified

  • activateFrame

  Generally, indicate that this frame has focus. This is usually called after the JInternalFrame's IS_SELECTED_PROPERTY has been set to true.
  Parameters:
  f - the JInternalFrame to be activated

  • deactivateFrame

  Generally, indicate that this frame has lost focus. This is usually called after the JInternalFrame's IS_SELECTED_PROPERTY has been set to false.
  Parameters:
  f - the JInternalFrame to be deactivated

  • beginDraggingFrame

  This method is normally called when the user has indicated that they will begin dragging a component around. This method should be called prior to any dragFrame() calls to allow the DesktopManager to prepare any necessary state. Normally f will be a JInternalFrame.
  Parameters:
  f - the JComponent being dragged

  • dragFrame

  void dragFrame​(JComponent f, int newX, int newY)
  The user has moved the frame. Calls to this method will be preceded by calls to beginDraggingFrame(). Normally f will be a JInternalFrame.
  Parameters:
  f - the JComponent being dragged
  newX - the new x-coordinate
  newY - the new y-coordinate

  • endDraggingFrame

  This method signals the end of the dragging session. Any state maintained by the DesktopManager can be removed here. Normally f will be a JInternalFrame.
  Parameters:
  f - the JComponent being dragged

  • beginResizingFrame

  void beginResizingFrame​(JComponent f, int direction)
  This method is normally called when the user has indicated that they will begin resizing the frame. This method should be called prior to any resizeFrame() calls to allow the DesktopManager to prepare any necessary state. Normally f will be a JInternalFrame.
  Parameters:
  f - the JComponent being resized
  direction - the direction

  • resizeFrame

  void resizeFrame​(JComponent f, int newX, int newY, int newWidth, int newHeight)
  The user has resized the component. Calls to this method will be preceded by calls to beginResizingFrame(). Normally f will be a JInternalFrame.
  Parameters:
  f - the JComponent being resized
  newX - the new x-coordinate
  newY - the new y-coordinate
  newWidth - the new width
  newHeight - the new height

  • endResizingFrame

  This method signals the end of the resize session. Any state maintained by the DesktopManager can be removed here. Normally f will be a JInternalFrame.
  Parameters:
  f - the JComponent being resized

  • setBoundsForFrame

  void setBoundsForFrame​(JComponent f, int newX, int newY, int newWidth, int newHeight)
  This is a primitive reshape method.
  Parameters:
  f - the JComponent being moved or resized
  newX - the new x-coordinate
  newY - the new y-coordinate
  newWidth - the new width
  newHeight - the new height