Package org.eclipse.jface.dialogs

Class DialogPage

java.lang.Object
org.eclipse.jface.dialogs.DialogPage
All Implemented Interfaces:
IDialogPage, IMessageProvider
Direct Known Subclasses:
InstallationPage, PreferencePage, WizardPage
public abstract class DialogPage extends Object implements IDialogPage, IMessageProvider
Abstract base implementation of a dialog page. All dialog pages are subclasses of this one.

  • Constructor Details

    • DialogPage

      protected DialogPage()
      Creates a new empty dialog page.

    • DialogPage

      protected DialogPage(String title)
      Creates a new dialog page with the given title.
      Parameters:
      title - the title of this dialog page, or null if none

    • DialogPage

      protected DialogPage(String title, ImageDescriptor image)
      Creates a new dialog page with the given title and image.
      Parameters:
      title - the title of this dialog page, or null if none
      image - the image for this dialog page, or null if none

  • Method Details

    • convertHeightInCharsToPixels

      protected int convertHeightInCharsToPixels(int chars)
      Returns the number of pixels corresponding to the height of the given number of characters.

      This method may only be called after initializeDialogUnits has been called.

      Clients may call this framework method, but should not override it.

      Parameters:
      chars - the number of characters
      Returns:
      the number of pixels

    • convertHorizontalDLUsToPixels

      protected int convertHorizontalDLUsToPixels(int dlus)
      Returns the number of pixels corresponding to the given number of horizontal dialog units.

      This method may only be called after initializeDialogUnits has been called.

      Clients may call this framework method, but should not override it.

      Parameters:
      dlus - the number of horizontal dialog units
      Returns:
      the number of pixels

    • convertVerticalDLUsToPixels

      protected int convertVerticalDLUsToPixels(int dlus)
      Returns the number of pixels corresponding to the given number of vertical dialog units.

      This method may only be called after initializeDialogUnits has been called.

      Clients may call this framework method, but should not override it.

      Parameters:
      dlus - the number of vertical dialog units
      Returns:
      the number of pixels

    • convertWidthInCharsToPixels

      protected int convertWidthInCharsToPixels(int chars)
      Returns the number of pixels corresponding to the width of the given number of characters.

      This method may only be called after initializeDialogUnits has been called.

      Clients may call this framework method, but should not override it.

      Parameters:
      chars - the number of characters
      Returns:
      the number of pixels

    • dispose

      public void dispose()
      The DialogPage implementation of this IDialogPage method disposes of the page image if it has one. Subclasses may extend.
      Specified by:
      dispose in interface IDialogPage

    • getControl

      public Control getControl()
      Returns the top level control for this dialog page.
      Specified by:
      getControl in interface IDialogPage
      Returns:
      the top level control

    • getDescription

      public String getDescription()
      Description copied from interface: IDialogPage
      Returns this dialog page's description text.
      Specified by:
      getDescription in interface IDialogPage
      Returns:
      the description text for this dialog page, or null if none

    • getDialogFontName

      protected String getDialogFontName()
      Returns the symbolic font name used by dialog pages.
      Returns:
      the symbolic font name

    • getErrorMessage

      public String getErrorMessage()
      Description copied from interface: IDialogPage
      Returns the current error message for this dialog page. May be null to indicate no error message.

      An error message should describe some error state, as opposed to a message which may simply provide instruction or information to the user.

      Specified by:
      getErrorMessage in interface IDialogPage
      Returns:
      the error message, or null if none

    • getFont

      protected Font getFont()
      Returns the default font to use for this dialog page.
      Returns:
      the font

    • getImage

      public Image getImage()
      Description copied from interface: IDialogPage
      Returns this dialog page's image.
      Specified by:
      getImage in interface IDialogPage
      Returns:
      the image for this dialog page, or null if none

    • getMessage

      public String getMessage()
      Description copied from interface: IDialogPage
      Returns the current message for this wizard page.

      A message provides instruction or information to the user, as opposed to an error message which should describe some error state.

      Specified by:
      getMessage in interface IDialogPage
      Specified by:
      getMessage in interface IMessageProvider
      Returns:
      the message, or null if none

    • getMessageType

      public int getMessageType()
      Description copied from interface: IMessageProvider
      Returns a value indicating if the message is a an information message, a warning message, or an error message.

      Returns one of NONE,INFORMATION, WARNING, or ERROR.

      Specified by:
      getMessageType in interface IMessageProvider
      Returns:
      the message type

    • getShell

      public Shell getShell()
      Returns this dialog page's shell. Convenience method for getControl().getShell(). This method may only be called after the page's control has been created.
      Returns:
      the shell

    • getTitle

      public String getTitle()
      Description copied from interface: IDialogPage
      Returns this dialog page's title.
      Specified by:
      getTitle in interface IDialogPage
      Returns:
      the title of this dialog page, or null if none

    • getToolTipText

      @Deprecated protected final String getToolTipText(int widgetId)
      Deprecated.
      Returns the tool tip text for the widget with the given id.

      The default implementation of this framework method does nothing and returns null. Subclasses may override.

      Parameters:
      widgetId - the id of the widget for which hover help is requested
      Returns:
      the tool tip text, or null if none

    • initializeDialogUnits

      protected void initializeDialogUnits(Control testControl)
      Initializes the computation of horizontal and vertical dialog units based on the size of current font.

      This method must be called before any of the dialog unit based conversion methods are called.

      Parameters:
      testControl - a control from which to obtain the current font

    • setButtonLayoutData

      protected GridData setButtonLayoutData(Button button)
      Sets the GridData on the specified button to be one that is spaced for the current dialog page units. The method initializeDialogUnits must be called once before calling this method for the first time.
      Parameters:
      button - the button to set the GridData
      Returns:
      the GridData set on the specified button

    • isControlCreated

      protected boolean isControlCreated()
      Tests whether this page's UI content has already been created.
      Returns:
      true if the control has been created, and false if not

    • performHelp

      public void performHelp()
      This default implementation of an IDialogPage method does nothing. Subclasses should override to take some action in response to a help request.
      Specified by:
      performHelp in interface IDialogPage

    • setControl

      protected void setControl(Control newControl)
      Set the control for the receiver.
      Parameters:
      newControl - control to set

    • setDescription

      public void setDescription(String description)
      Description copied from interface: IDialogPage
      Sets this dialog page's description text.
      Specified by:
      setDescription in interface IDialogPage
      Parameters:
      description - the description text for this dialog page, or null if none

    • setErrorMessage

      public void setErrorMessage(String newMessage)
      Sets or clears the error message for this page.
      Parameters:
      newMessage - the message, or null to clear the error message

    • setImageDescriptor

      public void setImageDescriptor(ImageDescriptor desc)
      Description copied from interface: IDialogPage
      Sets this dialog page's image.
      Specified by:
      setImageDescriptor in interface IDialogPage
      Parameters:
      desc - the image for this dialog page, or null if none

    • setMessage

      public void setMessage(String newMessage)
      Sets or clears the message for this page.

      This is a shortcut for setMessage(newMesasge, NONE)

      Parameters:
      newMessage - the message, or null to clear the message

    • setMessage

      public void setMessage(String newMessage, int newType)
      Sets the message for this page with an indication of what type of message it is.

      The valid message types are one of NONE, INFORMATION,WARNING, or ERROR.

      Note that for backward compatibility, a message of type ERROR is different than an error message (set using setErrorMessage). An error message overrides the current message until the error message is cleared. This method replaces the current message and does not affect the error message.

      Parameters:
      newMessage - the message, or null to clear the message
      newType - the message type
      Since:
      2.0

    • setTitle

      public void setTitle(String title)
      The DialogPage implementation of this IDialogPage method remembers the title in an internal state variable. Subclasses may extend.
      Specified by:
      setTitle in interface IDialogPage
      Parameters:
      title - the title of this dialog page, or null if none

    • setVisible

      public void setVisible(boolean visible)
      The DialogPage implementation of this IDialogPage method sets the control to the given visibility state. Subclasses may extend.
      Specified by:
      setVisible in interface IDialogPage
      Parameters:
      visible - true to make this page visible, and false to hide it