зеркало из https://github.com/mozilla/gecko-dev.git
361 строка
11 KiB
C++
361 строка
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsIView_h___
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#define nsIView_h___
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#include <stdio.h>
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#include "nsISupports.h"
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#include "nsCoord.h"
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#include "nsIWidget.h"
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#include "nsGUIEvent.h"
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class nsIViewManager;
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class nsRegion;
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class nsIRenderingContext;
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class nsTransform2D;
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class nsIFrame;
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struct nsRect;
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// Enumerated type to indicate the visibility of a layer.
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// hide - the layer is not shown.
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// show - the layer is shown irrespective of the visibility of
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// the layer's parent.
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// inherit - the layer inherits its visibility from its parent.
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typedef enum
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{
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nsViewVisibility_kHide = 0,
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nsViewVisibility_kShow = 1,
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nsViewVisibility_kInherit = 2
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} nsViewVisibility;
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// IID for the nsIView interface
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#define NS_IVIEW_IID \
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{ 0xf0a21c40, 0xa7e1, 0x11d1, \
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{ 0xa8, 0x24, 0x00, 0x40, 0x95, 0x9a, 0x28, 0xc9 } }
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//----------------------------------------------------------------------
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// View interface
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// Note that nsIView does not support reference counting; view object
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// have their lifetime bound to the view manager that contains them.
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class nsIView : public nsISupports
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{
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public:
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/**
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* Initialize the view
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* @param aManager view manager that "owns" the view
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* @param aBounds initial bounds for view
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* @param aParent parent view
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* @param aWindowIID IID for Widget type that this view
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* should have associated with it. if nsull, then no
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* width will be created for this view
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* @param aWidgetInitData data used to initialize this view's widget before
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* its create is called.
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* @param aNative native window that will be used as parent of
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* aWindowIID. if nsnull, then parent will be derived from
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* parent view and it's ancestors
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* @param aZIndex initial z depth of view
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* @param aCilpRect initial clip rect of view
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* @param aOpacity initial opacity of view
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* @param aVisibilityFlag initial visibility state of view
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* @result The result of the initialization, NS_OK if no errors
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*/
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virtual nsresult Init(nsIViewManager* aManager,
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const nsRect &aBounds,
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nsIView *aParent,
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const nsIID *aWindowIID = nsnull,
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void *aWidgetInitData = nsnull,
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nsNativeWindow aNative = nsnull,
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PRInt32 aZIndex = 0,
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const nsRect *aClipRect = nsnull,
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float aOpacity = 1.0f,
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nsViewVisibility aVisibilityFlag = nsViewVisibility_kShow) = 0;
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/**
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* Destroy the view
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*/
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virtual void Destroy() = 0;
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/**
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* Get the view manager the "owns" the view
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* @result view manager
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*/
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virtual nsIViewManager * GetViewManager() = 0;
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/**
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* In 4.0, the "cutout" nature of a view is queryable.
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* If we believe that all cutout view have a native widget, this
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* could be a replacement.
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* @result widget that this view contains
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*/
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virtual nsIWidget * GetWidget() = 0;
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/**
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* Called to indicate that the specified rect of the view
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* needs to be drawn via the rendering context. The rect
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* is specified in view coordinates.
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* @param rc rendering context to paint into
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* @param rect damage area
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*/
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virtual void Paint(nsIRenderingContext& rc, const nsRect& rect) = 0;
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/**
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* Called to indicate that the specified region of the view
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* needs to be drawn via the rendering context. The region
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* is specified in view coordinates.
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* @param rc rendering context to paint into
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* @param region damage area
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*/
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virtual void Paint(nsIRenderingContext& rc, const nsRegion& region) = 0;
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/**
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* Called to indicate that the specified event should be handled
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* by the view. This method should return nsEventStatus_eConsumeDoDefault
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* or nsEventStatus_eConsumeNoDefault if the event has been handled.
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* @param event event to process
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* @param aCheckParent used for recursive processing to indicate whether or
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* not parent views should attempt to handle the event
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* @param aCheckChildren used for recursive processing to indicate whether or
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* not child views should attempt to handle the event
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* @result processing status
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*/
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virtual nsEventStatus HandleEvent(nsGUIEvent *event, PRBool aCheckParent = PR_TRUE, PRBool aCheckChildren = PR_TRUE) = 0;
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/**
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* Called to indicate that the position of the view has been changed.
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* The specified coordinates are in the parent view's coordinate space.
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* @param x new x position
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* @param y new y position
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*/
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virtual void SetPosition(nscoord x, nscoord y) = 0;
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/**
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* Called to get the position of a view.
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* The specified coordinates are in the parent view's coordinate space.
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* @param x out parameter for x position
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* @param y out parameter for y position
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*/
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virtual void GetPosition(nscoord *x, nscoord *y) = 0;
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/**
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* Called to indicate that the dimensions of the view (actually the
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* width and height of the clip) have been changed.
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* @param width new width
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* @param height new height
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*/
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virtual void SetDimensions(nscoord width, nscoord height) = 0;
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virtual void GetDimensions(nscoord *width, nscoord *height) = 0;
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/**
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* Called to indicate that the dimensions and position of the view have
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* been changed.
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* @param aBounds new bounds
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*/
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virtual void SetBounds(const nsRect &aBounds) = 0;
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/**
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* Called to indicate that the dimensions and position of the view have
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* been changed.
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* @param aX new x position
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* @param aY new y position
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* @param aWidth new width
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* @param aHeight new height
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*/
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virtual void SetBounds(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight) = 0;
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/**
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* Called to get the dimensions and position of the view.
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* @param aBounds out parameter for bounds
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*/
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virtual void GetBounds(nsRect &aBounds) = 0;
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/**
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* Called to indicate that the clip of the view has been changed.
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* The clip is relative to the origin of the view.
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* @param aClip new bounds
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*/
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virtual void SetClip(const nsRect &aClip) = 0;
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/**
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* Called to indicate that the clip of the view has been changed.
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* The clip is relative to the origin of the view.
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* @param aX new x position
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* @param aY new y position
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* @param aWidth new width
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* @param aHeight new height
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*/
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virtual void SetClip(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight) = 0;
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/**
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* Called to get the dimensions and position of the clip for the view.
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* @param aClip out parameter for bounds
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* @result PR_TRUE of there actually is a clip for the view, else PR_FALSE
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*/
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virtual PRBool GetClip(nsRect &aClip) = 0;
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/**
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* Called to indicate that the visibility of a view has been
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* changed.
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* @param visibility new visibility state
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*/
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virtual void SetVisibility(nsViewVisibility visibility) = 0;
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/**
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* Called to query the visibility state of a view.
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* @result current visibility state
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*/
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virtual nsViewVisibility GetVisibility() = 0;
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/**
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* Called to indicate that the z-index of a view has been changed.
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* The z-index is relative to all siblings of the view.
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* @param zindex new z depth
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*/
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virtual void SetZIndex(PRInt32 zindex) = 0;
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/**
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* Called to query the z-index of a view.
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* The z-index is relative to all siblings of the view.
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* @result current z depth
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*/
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virtual PRInt32 GetZIndex() = 0;
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/**
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* Called to set the parent of the view.
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* @param aParent new parent
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*/
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virtual void SetParent(nsIView *aParent) = 0;
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/**
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* Called to query the parent of the view.
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* @result view's parent
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*/
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virtual nsIView *GetParent() = 0;
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/**
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* Called to query the next sibling of the view.
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* @result view's next sibling
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*/
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virtual nsIView* GetNextSibling() const = 0;
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/**
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* Called to set the next sibling of the view.
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* @param aNextSibling new next sibling
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*/
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virtual void SetNextSibling(nsIView* aNextSibling) = 0;
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/**
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* Used to insert a child after the specified sibling. In general,
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* child insertion will happen through the view manager and it
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* will determine the ordering of children in the child list.
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* @param child to insert in this view's child list
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* @param sibling view to set as next sibling of child
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*/
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virtual void InsertChild(nsIView *child, nsIView *sibling) = 0;
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/**
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* Remove a child from the child list. The removal will be driven
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* through the view manager.
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* @param child to remove
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*/
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virtual void RemoveChild(nsIView *child) = 0;
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/**
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* Get the number of children for this view.
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* @result child count
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*/
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virtual PRInt32 GetChildCount() = 0;
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/**
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* Get a child at a specific index. Could be replaced by some sort of
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* enumeration API.
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* @param index of desired child view
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* @result the view at index or nsnull if there is no such child
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*/
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virtual nsIView * GetChild(PRInt32 index) = 0;
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/**
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* Note: This didn't exist in 4.0. This transform might include scaling
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* but probably not rotation for the first pass.
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* @param transform new transformation of view
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*/
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virtual void SetTransform(nsTransform2D *transform) = 0;
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/**
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* Note: This didn't exist in 4.0. This transform might include scaling
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* but probably not rotation for the first pass.
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* @result view's transformation
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*/
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virtual nsTransform2D * GetTransform() = 0;
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/**
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* Note: This didn't exist in 4.0. Called to set the opacity of a view.
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* A value of 0.0 means completely transparent. A value of 1.0 means
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* completely opaque.
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* @param opacity new opacity value
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*/
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virtual void SetOpacity(float opacity) = 0;
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/**
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* Note: This didn't exist in 4.0. Called to set the opacity of a view.
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* A value of 0.0 means completely transparent. A value of 1.0 means
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* completely opaque.
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* @result view's opacity value
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*/
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virtual float GetOpacity() = 0;
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/**
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* Used to ask a view if it has any areas within its bounding box
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* that are transparent. This is not the same as opacity - opacity can
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* be set externally, transparency is a quality of the view itself.
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* @result Returns PR_TRUE if there are transparent areas, PR_FALSE otherwise.
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*/
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virtual PRBool HasTransparency() = 0;
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/**
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* Set the view's link to the nsIFrame part of the universe.
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* @param aFrame frame to associate with view. nsnull to disassociate
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*/
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virtual void SetFrame(nsIFrame *aFrame) = 0;
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/**
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* Query the view for it's link to the nsIFrame part of the universe.
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* @result frame associated with view or nsnull if there is none.
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*/
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virtual nsIFrame * GetFrame() = 0;
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/**
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* Move child widgets around by (dx, dy). deltas are in widget
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* coordinate space.
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* @param aDx x delta
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* @param aDy y delta
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*/
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virtual void AdjustChildWidgets(nscoord aDx, nscoord aDy) = 0;
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/**
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* Output debug info to FILE
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* @param out output file handle
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* @param aIndent indentation depth
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*/
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virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const = 0;
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};
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#endif
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