gecko-dev/layout/forms/nsFormControlFrame.h
1999-08-21 00:09:24 +00:00

274 lines
9.0 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsFormControlFrame_h___
#define nsFormControlFrame_h___
#include "nsIFormControlFrame.h"
#include "nsFormControlHelper.h"
#include "nsIFormManager.h"
#include "nsISupports.h"
#include "nsIWidget.h"
#include "nsLeafFrame.h"
#include "nsCoord.h"
#include "nsIStyleContext.h"
class nsIView;
class nsIPresContext;
class nsStyleCoord;
class nsFormFrame;
#define CSS_NOTSET -1
#define ATTR_NOTSET -1
#define NS_FORMSIZE_NOTSET -1
/**
* nsFormControlFrame is the base class for frames of form controls. It
* provides a uniform way of creating widgets, resizing, and painting.
* @see nsLeafFrame and its base classes for more info
*/
class nsFormControlFrame : public nsLeafFrame,
public nsIFormControlFrame
{
public:
/**
* Main constructor
* @param aContent the content representing this frame
* @param aParentFrame the parent frame
*/
nsFormControlFrame();
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
/**
* Respond to a gui event
* @see nsIFrame::HandleEvent
*/
NS_IMETHOD HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus);
/**
* Draw this frame within the context of a presentation context and rendering context
* @see nsIFrame::Paint
*/
NS_IMETHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
NS_IMETHOD SetInitialChildList(nsIPresContext& aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList);
NS_IMETHOD DidReflow(nsIPresContext& aPresContext,
nsDidReflowStatus aStatus);
/**
* Respond to the request to resize and/or reflow
* @see nsIFrame::Reflow
*/
NS_IMETHOD Reflow(nsIPresContext& aCX,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
// new behavior
/**
* Get the class id of the widget associated with this frame
* @return the class id
*/
virtual const nsIID& GetCID();
/**
* Get the interface id of widget associated with this frame
* @return the interface id
*/
virtual const nsIID& GetIID();
NS_IMETHOD GetType(PRInt32* aType) const;
NS_IMETHOD GetName(nsString* aName);
NS_IMETHOD GetValue(nsString* aName);
virtual PRInt32 GetMaxNumValues();
virtual PRBool GetNamesValues(PRInt32 aMaxNumValues, PRInt32& aNumValues,
nsString* aValues, nsString* aNames);
/**
* Respond to a enter key being pressed
*/
virtual void EnterPressed(nsIPresContext& aPresContext) {}
/**
* Respond to a mouse click (e.g. mouse enter, mouse down, mouse up)
*/
virtual void MouseClicked(nsIPresContext* aPresContext) {}
/**
* Respond to a control change (e.g. combo box close-up)
*/
virtual void ControlChanged(nsIPresContext* aPresContext) {}
/**
* Perform opertations after the widget associated with this frame has been
* created.
*/
virtual void PostCreateWidget(nsIPresContext* aPresContext,
nscoord& aWidth, nscoord& aHeight);
virtual void SetFocus(PRBool aOn = PR_TRUE, PRBool aRepaint = PR_FALSE);
virtual void ScrollIntoView(nsIPresContext* aPresContext);
virtual void Reset();
virtual PRBool IsSuccessful(nsIFormControlFrame* aSubmitter);
/**
* Perform opertations before the widget associated with this frame has been
* created.
*/
virtual nsWidgetInitData* GetWidgetInitData(nsIPresContext& aPresContext);
void GetWidgetSize(nsSize& aSize) const { aSize.width = mWidgetSize.width;
aSize.height = mWidgetSize.height; }
// XXX similar functionality needs to be added to widget library and these
// need to change to use it.
static nscoord GetScrollbarWidth(float aPixToTwip);
virtual nscoord GetVerticalBorderWidth(float aPixToTwip) const;
virtual nscoord GetHorizontalBorderWidth(float aPixToTwip) const;
virtual nscoord GetVerticalInsidePadding(float aPixToTwip,
nscoord aInnerHeight) const;
virtual nscoord GetHorizontalInsidePadding(nsIPresContext& aPresContext,
float aPixToTwip,
nscoord aInnerWidth,
nscoord aCharWidth) const;
virtual nsresult GetSizeFromContent(PRInt32* aSize) const;
NS_IMETHOD GetMaxLength(PRInt32* aSize);
virtual void SetClickPoint(nscoord aX, nscoord aY);
nsFormFrame* GetFormFrame() { return mFormFrame; }
virtual void SetFormFrame(nsFormFrame* aFormFrame) { mFormFrame = aFormFrame; }
NS_IMETHOD GetFont(nsIPresContext* aPresContext,
nsFont& aFont);
NS_IMETHOD GetFormContent(nsIContent*& aContent) const;
/**
* Get the width and height of this control based on CSS
* @param aPresContext the presentation context
* @param aSize the size that this frame wants, set by this method. values of -1
* for aSize.width or aSize.height indicate unset values.
*/
static void GetStyleSize(nsIPresContext& aContext,
const nsHTMLReflowState& aReflowState,
nsSize& aSize);
// nsIFormControlFrame
NS_IMETHOD SetProperty(nsIAtom* aName, const nsString& aValue);
NS_IMETHOD GetProperty(nsIAtom* aName, nsString& aValue);
protected:
virtual ~nsFormControlFrame();
/**
* Determine if the control uses a native widget for rendering
* @param aRequiresWidget is set to PR_TRUE if it has a native widget, PR_FALSE otherwise.
* @returns NS_OK
*/
virtual nsresult RequiresWidget(PRBool &aRequiresWidget);
/**
* Get the size that this frame would occupy without any constraints
* @param aPresContext the presentation context
* @param aDesiredSize the size desired by this frame, to be set by this method
* @param aMaxSize the maximum size available for this frame
*/
virtual void GetDesiredSize(nsIPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aDesiredSize);
virtual void GetDesiredSize(nsIPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aDesiredLayoutSize,
nsSize& aDesiredWidgetSize);
NS_IMETHOD SetSuggestedSize(nscoord aWidth, nscoord aHeight);
//
//-------------------------------------------------------------------------------------
// Utility methods for managing checkboxes and radiobuttons
//-------------------------------------------------------------------------------------
//
/**
* Get the state of the checked attribute.
* @param aState set to PR_TRUE if the checked attribute is set,
* PR_FALSE if the checked attribute has been removed
* @returns NS_OK or NS_CONTENT_ATTR_HAS_VALUE
*/
nsresult GetCurrentCheckState(PRBool* aState);
/**
* Set the state of the checked attribute.
* @param aState set to PR_TRUE to set the attribute,
* PR_FALSE to unset the attribute
* @returns NS_OK or NS_CONTENT_ATTR_HAS_VALUE
*/
nsresult SetCurrentCheckState(PRBool aState);
/**
* Get the state of the defaultchecked attribute.
* @param aState set to PR_TRUE if the defaultchecked attribute is set,
* PR_FALSE if the checked attribute has been removed
* @returns NS_OK or NS_CONTENT_ATTR_HAS_VALUE
*/
nsresult GetDefaultCheckState(PRBool* aState);
/**
* Set the state of the checked attribute.
* @param aState set to PR_TRUE to set the checked attribute
* PR_FALSE to unset it
* @returns NS_OK
*/
nsresult SetDefaultCheckState(PRBool aState);
nsSize mWidgetSize;
PRBool mDidInit;
nsPoint mLastClickPoint;
nsFormFrame* mFormFrame;
nscoord mSuggestedWidth;
nscoord mSuggestedHeight;
private:
NS_IMETHOD_(nsrefcnt) AddRef() { return NS_OK; }
NS_IMETHOD_(nsrefcnt) Release() { return NS_OK; }
};
#endif