layout/forms/nsFormControlFrame.h
author Ehsan Akhgari <ehsan@mozilla.com>
Mon, 17 Oct 2011 10:59:28 -0400
changeset 79324 ec7577dec4fceef0ac2717416d9c48289402d935
parent 78238 e7854b4d29ba905ae3994f821b160c989bac4260
child 79326 f93960a93ad97a56d308bd9ce25d97cbc175d524
child 95919 f4157e8c410708d76703f19e4dfb61859bfe32d8
permissions -rw-r--r--
Bug 690892 - Replace PR_TRUE/PR_FALSE with true/false on mozilla-central; rs=dbaron Landing on a CLOSED TREE

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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#ifndef nsFormControlFrame_h___
#define nsFormControlFrame_h___

#include "nsIFormControlFrame.h"
#include "nsLeafFrame.h"

/** 
 * nsFormControlFrame is the base class for radio buttons and
 * checkboxes.  It also has two static methods (RegUnRegAccessKey and
 * GetScreenHeight) that are used by other form controls.
 */
class nsFormControlFrame : public nsLeafFrame,
                           public nsIFormControlFrame
{
public:
  /**
    * Main constructor
    * @param aContent the content representing this frame
    * @param aParentFrame the parent frame
    */
  nsFormControlFrame(nsStyleContext*);

  virtual bool IsFrameOfType(PRUint32 aFlags) const
  {
    return nsLeafFrame::IsFrameOfType(aFlags &
      ~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
  }

  NS_DECL_QUERYFRAME
  NS_DECL_FRAMEARENA_HELPERS

  /** 
    * Respond to a gui event
    * @see nsIFrame::HandleEvent
    */
  NS_IMETHOD HandleEvent(nsPresContext* aPresContext, 
                         nsGUIEvent* aEvent,
                         nsEventStatus* aEventStatus);

  virtual nscoord GetBaseline() const;

  /**
    * Respond to the request to resize and/or reflow
    * @see nsIFrame::Reflow
    */
  NS_IMETHOD Reflow(nsPresContext*      aCX,
                    nsHTMLReflowMetrics& aDesiredSize,
                    const nsHTMLReflowState& aReflowState,
                    nsReflowStatus&      aStatus);

  virtual void DestroyFrom(nsIFrame* aDestructRoot);

  // new behavior

  virtual void SetFocus(bool aOn = true, bool aRepaint = false);

  // nsIFormControlFrame
  virtual nsresult SetFormProperty(nsIAtom* aName, const nsAString& aValue);

  virtual nsresult GetFormProperty(nsIAtom* aName, nsAString& aValue) const; 
  
  // AccessKey Helper function
  static nsresult RegUnRegAccessKey(nsIFrame * aFrame, bool aDoReg);

  /**
   * Returns the usable screen rect in app units, eg the rect where we can
   * draw dropdowns.
   */
  static nsRect GetUsableScreenRect(nsPresContext* aPresContext);

protected:

  virtual ~nsFormControlFrame();

  virtual nscoord GetIntrinsicWidth();
  virtual nscoord GetIntrinsicHeight();

//
//-------------------------------------------------------------------------------------
//  Utility methods for managing checkboxes and radiobuttons
//-------------------------------------------------------------------------------------
//   
   /**
    * Get the state of the checked attribute.
    * @param aState set to true if the checked attribute is set,
    * false if the checked attribute has been removed
    */

  void GetCurrentCheckState(bool* aState);
};

#endif