зеркало из https://github.com/mozilla/gecko-dev.git
411 строки
13 KiB
C++
411 строки
13 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 nsIViewManager_h___
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#define nsIViewManager_h___
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#include "nscore.h"
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#include "nsISupports.h"
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#include "nsCoord.h"
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#include "nsIView.h"
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class nsIRegion;
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class nsIEvent;
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class nsIPresContext;
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class nsIView;
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class nsIScrollableView;
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class nsIWidget;
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struct nsRect;
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typedef enum
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{
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nsContentQuality_kGood = 0,
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nsContentQuality_kFair,
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nsContentQuality_kPoor,
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nsContentQuality_kUnknown
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} nsContentQuality;
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#define NS_IVIEWMANAGER_IID \
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{ 0x3a8863d0, 0xa7f3, 0x11d1, \
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{ 0xa8, 0x24, 0x00, 0x40, 0x95, 0x9a, 0x28, 0xc9 } }
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class nsIViewManager : public nsISupports
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{
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public:
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static const nsIID& GetIID() { static nsIID iid = NS_IVIEWMANAGER_IID; return iid; }
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/**
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* Initialize the ViewManager
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* Note: this instance does not hold a reference to the viewobserver
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* because it holds a reference to this instance.
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* @param aContext the device context to use.
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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(nsIDeviceContext* aContext) = 0;
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/**
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* Get the root of the view tree.
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* @result the root view
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*/
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NS_IMETHOD GetRootView(nsIView *&aView) = 0;
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/**
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* Set the root of the view tree. Does not destroy the current root view.
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* @param aView view to set as root
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*/
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NS_IMETHOD SetRootView(nsIView *aView) = 0;
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/**
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* Get the current framerate i.e. the rate at which timed
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* refreshes occur. A framerate of 0 indicates that timed refreshes
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* should not occur. framerate is in terms of frames per second
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* @result the update rate in terms of frames per second
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*/
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NS_IMETHOD GetFrameRate(PRUint32& aRate) = 0;
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/**
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* Set the current framerate.
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* @param frameRate new update rate. see GetFrameRate for more info
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* @result the call may need to create a timer and the success
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* status will be returned. NS_OK means all is well
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*/
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NS_IMETHOD SetFrameRate(PRUint32 frameRate) = 0;
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/**
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* Get the dimensions of the root window. The dimensions are in
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* twips
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* @param width out parameter for width of window in twips
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* @param height out parameter for height of window in twips
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*/
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NS_IMETHOD GetWindowDimensions(nscoord *width, nscoord *height) = 0;
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/**
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* Set the dimensions of the root window.
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* Called if the root window is resized. The dimensions are in
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* twips
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* @param width of window in twips
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* @param height of window in twips
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*/
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NS_IMETHOD SetWindowDimensions(nscoord width, nscoord height) = 0;
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/**
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* Reset the state of scrollbars and the scrolling region
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*/
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NS_IMETHOD ResetScrolling(void) = 0;
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/**
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* Called to force a redrawing of any dirty areas.
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*/
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NS_IMETHOD Composite(void) = 0;
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/**
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* Called to inform the view manager that some portion of a view
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* is dirty and needs to be redrawn. The region passed in
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* should be in the view's coordinate space.
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* @param aView view to paint. should be root view
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* @param region region to mark as damaged, if nsnull, then entire
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* view is marked as damaged
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* @param aUpdateFlags see bottom of nsIViewManager.h for description
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*/
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NS_IMETHOD UpdateView(nsIView *aView, nsIRegion *aRegion,
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PRUint32 aUpdateFlags) = 0;
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/**
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* Called to inform the view manager that some portion of a view
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* is dirty and needs to be redrawn. The rect passed in
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* should be in the view's coordinate space.
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* @param aView view to paint. should be root view
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* @param rect rect to mark as damaged
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* @param aUpdateFlags see bottom of nsIViewManager.h for description
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*/
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NS_IMETHOD UpdateView(nsIView *aView, const nsRect &aRect, PRUint32 aUpdateFlags) = 0;
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/**
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* Called to dispatch an event to the appropriate view. Often called
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* as a result of receiving a mouse or keyboard event from the widget
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* event system.
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* @param event event to dispatch
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* @result event handling status
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*/
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NS_IMETHOD DispatchEvent(nsGUIEvent *aEvent, nsEventStatus& aStatus) = 0;
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/**
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* Used to grab/capture all mouse events for a specific view,
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* irrespective of the cursor position at which the
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* event occurred.
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* @param aView view to capture mouse events
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* @result event handling status
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*/
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NS_IMETHOD GrabMouseEvents(nsIView *aView, PRBool& aResult) = 0;
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/**
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* Used to grab/capture all keyboard events for a specific view,
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* irrespective of the cursor position at which the
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* event occurred.
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* @param aView view to capture keyboard events
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* @result event handling status
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*/
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NS_IMETHOD GrabKeyEvents(nsIView *aView, PRBool& aResult) = 0;
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/**
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* Get the current view, if any, that's capturing mouse events.
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* @result view that is capturing mouse events or nsnull
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*/
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NS_IMETHOD GetMouseEventGrabber(nsIView *&aView) = 0;
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/**
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* Get the current view, if any, that's capturing keyboard events.
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* @result view that is capturing keyboard events or nsnull
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*/
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NS_IMETHOD GetKeyEventGrabber(nsIView *&aView) = 0;
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/**
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* Given a parent view, insert another view as its child. If above
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* is PR_TRUE, the view is inserted above (in z-order) the sibling. If
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* it is PR_FALSE, the view is inserted below.
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* The view manager generates the appopriate dirty regions.
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* @param parent parent view
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* @param child child view
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* @param sibling sibling view
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* @param above boolean above or below state
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*/
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NS_IMETHOD InsertChild(nsIView *aParent, nsIView *aChild, nsIView *aSibling,
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PRBool aAbove) = 0;
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/**
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* Given a parent view, insert another view as its child. The zindex
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* indicates where the child should be inserted relative to other
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* children of the parent.
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* The view manager generates the appopriate dirty regions.
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* @param parent parent view
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* @param child child view
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* @param zindex z depth of child
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*/
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NS_IMETHOD InsertChild(nsIView *aParent, nsIView *aChild,
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PRInt32 aZIndex) = 0;
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/**
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* Remove a specific child of a view.
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* The view manager generates the appopriate dirty regions.
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* @param parent parent view
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* @param child child view
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*/
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NS_IMETHOD RemoveChild(nsIView *aParent, nsIView *aChild) = 0;
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/**
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* Move a view's position by the specified amount.
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* The view manager generates the appopriate dirty regions.
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* @param aView view to move
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* @param x x offset to add to current view position
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* @param y y offset to add to current view position
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*/
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NS_IMETHOD MoveViewBy(nsIView *aView, nscoord aX, nscoord aY) = 0;
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/**
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* Move a view to the specified position,
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* provided in parent coordinates.
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* The view manager generates the appopriate dirty regions.
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* @param aView view to move
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* @param x x value for new view position
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* @param y y value for new view position
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*/
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NS_IMETHOD MoveViewTo(nsIView *aView, nscoord aX, nscoord aY) = 0;
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/**
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* Resize a view to the specified width and height.
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* The view manager generates the appopriate dirty regions.
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* @param aView view to move
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* @param width new view width
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* @param height new view height
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*/
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NS_IMETHOD ResizeView(nsIView *aView, nscoord aWidth, nscoord aHeight) = 0;
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/**
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* Set the clip of a view.
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* The view manager generates the appopriate dirty regions.
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* @param aView view to to clip rect on
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* @param rect new clipping rect for view
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*/
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NS_IMETHOD SetViewClip(nsIView *aView, nsRect *aRect) = 0;
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/**
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* Set the visibility of a view.
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* The view manager generates the appopriate dirty regions.
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* @param aView view to change visibility state of
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* @param visible new visibility state
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*/
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NS_IMETHOD SetViewVisibility(nsIView *aView, nsViewVisibility aVisible) = 0;
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/**
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* Set the z-index of a view. Positive z-indices mean that a view
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* is above its parent in z-order. Negative z-indices mean that a
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* view is below its parent.
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* The view manager generates the appopriate dirty regions.
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* @param aView view to change z depth of
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* @param zindex new z depth
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*/
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NS_IMETHOD SetViewZIndex(nsIView *aView, PRInt32 aZindex) = 0;
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/**
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* Used to move a view above another in z-order.
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* The view manager generates the appopriate dirty regions.
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* @param aView view to change z depth of
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* @param other view to move aView above
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*/
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NS_IMETHOD MoveViewAbove(nsIView *aView, nsIView *aOther) = 0;
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/**
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* Used to move a view below another in z-order.
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* The view manager generates the appopriate dirty regions.
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* @param aView view to change z depth of
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* @param other view to move aView below
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*/
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NS_IMETHOD MoveViewBelow(nsIView *aView, nsIView *aOther) = 0;
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/**
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* Returns whether a view is actually shown (based on its visibility
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* and that of its ancestors).
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* @param aView view to query visibilty of
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* @result PR_TRUE if visible, else PR_FALSE
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*/
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NS_IMETHOD IsViewShown(nsIView *aView, PRBool &aResult) = 0;
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/**
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* Returns the clipping area of a view in absolute coordinates.
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* @param aView view to query clip rect of
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* @param rect to set with view's clipping rect
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* @result PR_TRUE if there is a clip rect, else PR_FALSE
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*/
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NS_IMETHOD GetViewClipAbsolute(nsIView *aView, nsRect *aRect, PRBool &aResult) = 0;
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/**
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* Used set the transparency status of the content in a view. see
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* nsIView.HasTransparency().
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* @param aTransparent PR_TRUE if there are transparent areas, PR_FALSE otherwise.
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*/
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NS_IMETHOD SetViewContentTransparency(nsIView *aView, PRBool aTransparent) = 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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NS_IMETHOD SetViewOpacity(nsIView *aView, float aOpacity) = 0;
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/**
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* Set the view observer associated with this manager
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* @param aObserver - new observer
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* @result error status
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*/
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NS_IMETHOD SetViewObserver(nsIViewObserver *aObserver) = 0;
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/**
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* Get the view observer associated with this manager
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* @param aObserver - out parameter for observer
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* @result error status
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*/
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NS_IMETHOD GetViewObserver(nsIViewObserver *&aObserver) = 0;
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/**
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* Get the device context associated with this manager
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* @result device context
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*/
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NS_IMETHOD GetDeviceContext(nsIDeviceContext *&aContext) = 0;
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/**
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* Select whether quality level should be displayed in root view
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* @param aShow if PR_TRUE, quality level will be displayed, else hidden
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*/
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NS_IMETHOD ShowQuality(PRBool aShow) = 0;
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/**
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* Query whether quality level should be displayed in view frame
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* @return if PR_TRUE, quality level will be displayed, else hidden
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*/
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NS_IMETHOD GetShowQuality(PRBool &aResult) = 0;
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/**
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* Select whether quality level should be displayed in root view
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* @param aShow if PR_TRUE, quality level will be displayed, else hidden
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*/
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NS_IMETHOD SetQuality(nsContentQuality aQuality) = 0;
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/**
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* prevent the view manager from refreshing.
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* @return error status
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*/
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NS_IMETHOD DisableRefresh(void) = 0;
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/**
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* allow the view manager to refresh. this may cause a synchronous
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* paint to occur inside the call.
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* @return error status
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*/
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NS_IMETHOD EnableRefresh(void) = 0;
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/**
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* prevents the view manager from refreshing. allows UpdateView()
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* to notify widgets of damaged regions that should be repainted
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* when the batch is ended.
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* @return error status
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*/
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NS_IMETHOD BeginUpdateViewBatch(void) = 0;
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/**
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* allow the view manager to refresh any damaged areas accumulated
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* after the BeginUpdateViewBatch() call. this may cause a
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* synchronous paint to occur inside the call.
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* @return error status
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*/
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NS_IMETHOD EndUpdateViewBatch(void) = 0;
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/**
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* set the view that is is considered to be the root scrollable
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* view for the document.
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* @param aScrollable root scrollable view
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* @return error status
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*/
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NS_IMETHOD SetRootScrollableView(nsIScrollableView *aScrollable) = 0;
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/**
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* get the view that is is considered to be the root scrollable
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* view for the document.
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* @param aScrollable out parameter for root scrollable view
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* @return error status
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*/
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NS_IMETHOD GetRootScrollableView(nsIScrollableView **aScrollable) = 0;
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/**
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* Display the specified view. Used when printing.
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*/
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NS_IMETHOD Display(nsIView *aView) = 0;
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};
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//when the refresh happens, should it be double buffered?
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#define NS_VMREFRESH_DOUBLE_BUFFER 0x0001
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//update view now?
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#define NS_VMREFRESH_IMMEDIATE 0x0002
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//prevent "sync painting"
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#define NS_VMREFRESH_NO_SYNC 0x0004
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//if the total damage area is greater than 25% of the
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//area of the root view, use double buffering
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#define NS_VMREFRESH_AUTO_DOUBLE_BUFFER 0x0008
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#endif // nsIViewManager_h___
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