зеркало из https://github.com/mozilla/gecko-dev.git
273 строки
9.9 KiB
C++
273 строки
9.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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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 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsIView_h___
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#define nsIView_h___
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#include "nsISupports.h"
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#include "nsCoord.h"
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#include <stdio.h>
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#include "nsIWidget.h"
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class nsIViewManager;
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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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enum nsViewVisibility {
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nsViewVisibility_kHide = 0,
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nsViewVisibility_kShow = 1
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};
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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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/**
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* View interface
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*
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* Views are NOT reference counted. Use the Destroy() member function to
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* destroy a view.
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*
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* The lifetime of the view hierarchy is bounded by the lifetime of the
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* view manager that owns the views.
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*
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* Most of the methods here are read-only. To set the corresponding properties
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* of a view, go through nsIViewManager.
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*/
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class nsIView : public nsISupports
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{
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public:
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NS_DEFINE_STATIC_IID_ACCESSOR(NS_IVIEW_IID)
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/**
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* Initialize the view
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* @param aManager view manager that "owns" the view. The view does NOT
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* hold a reference to the view manager
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* @param aBounds initial bounds for view
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* @param aParent intended parent for view. this is not actually set in the
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* nsIView through this method. it is only used by the initialization
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* code to walk up the view tree, if necessary, to find resources.
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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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NS_IMETHOD Init(nsIViewManager* aManager,
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const nsRect &aBounds,
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const nsIView *aParent,
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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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* The view destroys its child views, and destroys and releases its
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* widget (if it has one).
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*
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* Also informs the view manager that the view is destroyed by calling
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* SetRootView(NULL) if the view is the root view and calling RemoveChild()
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* otherwise.
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*/
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NS_IMETHOD Destroy() = 0;
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/**
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* Get the view manager which "owns" the view.
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* This method might require some expensive traversal work in the future. If you can get the
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* view manager from somewhere else, do that instead.
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* @result the view manager
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*/
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NS_IMETHOD GetViewManager(nsIViewManager *&aViewMgr) const = 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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* This is the (0, 0) origin of the coordinate space established by this view.
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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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NS_IMETHOD GetPosition(nscoord *aX, nscoord *aY) const = 0;
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/**
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* Called to get the dimensions and position of the view's bounds.
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* The view's bounds (x,y) are in the coordinate space of the parent view.
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* The view's bounds (x,y) might not be the same as the view's position,
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* if the view has content above or to the left of its origin.
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* @param aBounds out parameter for bounds
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*/
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NS_IMETHOD GetBounds(nsRect &aBounds) const = 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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NS_IMETHOD GetVisibility(nsViewVisibility &aVisibility) const = 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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* @param aAuto PR_TRUE if the view is zindex:auto
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* @param aZIndex explicit z-index value.
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* @param aTopMost used when this view is zindex:auto
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* PR_TRUE if the view is topmost when compared
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* with another z-index:auto view
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*
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*/
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NS_IMETHOD GetZIndex(PRBool &aAuto, PRInt32 &aZIndex, PRBool &aTopMost) const = 0;
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/**
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* Get whether the view "floats" above all other views,
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* which tells the compositor not to consider higher views in
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* the view hierarchy that would geometrically intersect with
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* this view. This is a hack, but it fixes some problems with
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* views that need to be drawn in front of all other views.
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* @result PR_TRUE if the view floats, PR_FALSE otherwise.
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*/
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NS_IMETHOD GetFloating(PRBool &aFloatingView) const = 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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NS_IMETHOD GetParent(nsIView *&aParent) const = 0;
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/**
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* The view's first child is the child which is earliest in document order.
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* @result first child
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*/
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NS_IMETHOD GetFirstChild(nsIView* &aChild) const = 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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NS_IMETHOD GetNextSibling(nsIView *&aNextSibling) const = 0;
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/**
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* Note: This didn't exist in 4.0. Called to get 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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NS_IMETHOD GetOpacity(float &aOpacity) const = 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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NS_IMETHOD HasTransparency(PRBool &aTransparent) const = 0;
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/**
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* Set the view's link to client owned data.
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* @param aData - data to associate with view. nsnull to disassociate
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*/
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NS_IMETHOD SetClientData(void *aData) = 0;
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/**
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* Query the view for it's link to client owned data.
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* @result data associated with view or nsnull if there is none.
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*/
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NS_IMETHOD GetClientData(void *&aData) const = 0;
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/**
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* Get the nearest widget in this view or a parent of this view and
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* the offset from the view that contains the widget to this view
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* @param aDx out parameter for x offset
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* @param aDy out parameter for y offset
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* @return widget (if there is one) closest to view
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*/
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NS_IMETHOD GetOffsetFromWidget(nscoord *aDx, nscoord *aDy, nsIWidget *&aWidget) = 0;
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/**
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* Create a widget to associate with this view. This is a helper
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* function for SetWidget.
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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 aWindowType is either content, UI or inherit from parent window.
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* This is used to expose what type of window this is to
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* assistive technology like screen readers.
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* @return error status
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*/
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NS_IMETHOD CreateWidget(const nsIID &aWindowIID,
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nsWidgetInitData *aWidgetInitData = nsnull,
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nsNativeWidget aNative = nsnull,
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PRBool aEnableDragDrop = PR_TRUE,
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PRBool aResetVisibility = PR_TRUE,
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nsContentType aWindowType = eContentTypeInherit) = 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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* @param aWidget out parameter for widget that this view contains,
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* or nsnull if there is none.
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*/
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NS_IMETHOD GetWidget(nsIWidget *&aWidget) const = 0;
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/**
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* Returns PR_TRUE if the view has a widget associated with it.
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* @param aHasWidget out parameter that indicates whether a view has a widget.
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*/
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NS_IMETHOD HasWidget(PRBool *aHasWidget) const = 0;
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// XXX Temporary for Bug #19416
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NS_IMETHOD IgnoreSetPosition(PRBool aShouldIgnore) = 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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NS_IMETHOD List(FILE* out, PRInt32 aIndent = 0) const = 0;
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private:
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NS_IMETHOD_(nsrefcnt) AddRef(void) = 0;
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NS_IMETHOD_(nsrefcnt) Release(void) = 0;
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};
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#endif
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