зеркало из https://github.com/mozilla/gecko-dev.git
265 строки
8.9 KiB
C++
265 строки
8.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.1 (the "License"); you may not use this file except in
|
|
* compliance with the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the NPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the NPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#ifndef nsIScrollableView_h___
|
|
#define nsIScrollableView_h___
|
|
|
|
#include "nsISupports.h"
|
|
#include "nsCoord.h"
|
|
#include "nsIViewManager.h"
|
|
|
|
class nsIView;
|
|
class nsIScrollPositionListener;
|
|
struct nsMargin;
|
|
|
|
typedef enum {
|
|
nsScrollPreference_kAuto = 0,
|
|
nsScrollPreference_kNeverScroll,
|
|
nsScrollPreference_kAlwaysScroll,
|
|
nsScrollPreference_kAlwaysScrollHorizontal,
|
|
nsScrollPreference_kAlwaysScrollVertical
|
|
} nsScrollPreference;
|
|
|
|
// the percentage of the page that is scrolled on a page up or down
|
|
#define PAGE_SCROLL_PERCENT 0.9
|
|
|
|
// IID for the nsIScrollableView interface
|
|
#define NS_ISCROLLABLEVIEW_IID \
|
|
{ 0xc95f1830, 0xc376, 0x11d1, \
|
|
{ 0xb7, 0x21, 0x0, 0x60, 0x8, 0x91, 0xd8, 0xc9 } }
|
|
|
|
/**
|
|
* A scrolling view allows an arbitrary view that you supply to be scrolled
|
|
* vertically or horizontally (or both). The scrolling view creates and
|
|
* manages the scrollbars.
|
|
*
|
|
* You must use SetScrolledView() to specify the view that is to be scrolled,
|
|
* because the scrolled view is made a child of the clip view (an internal
|
|
* child view created by the scrolling view).
|
|
*
|
|
*/
|
|
class nsIScrollableView : public nsISupports {
|
|
public:
|
|
NS_DEFINE_STATIC_IID_ACCESSOR(NS_ISCROLLABLEVIEW_IID)
|
|
|
|
/**
|
|
* Create the controls used to allow scrolling. Call this method
|
|
* before anything else is done with the scrollable view.
|
|
* @param aNative native widget to use as parent for control widgets
|
|
* @return error status
|
|
*/
|
|
NS_IMETHOD CreateScrollControls(nsNativeWidget aNative = nsnull) = 0;
|
|
|
|
/**
|
|
* Compute the values for the scroll bars and adjust the position
|
|
* of the scrolled view as necessary.
|
|
* @param aAdjustWidgets if any widgets that are children of the
|
|
* scrolled view should be repositioned after rethinking
|
|
* the scroll parameters, set this ot PR_TRUE. in general
|
|
* this should be true unless you intended to vists the
|
|
* child widgets manually.
|
|
* @return error status
|
|
*/
|
|
NS_IMETHOD ComputeScrollOffsets(PRBool aAdjustWidgets = PR_TRUE) = 0;
|
|
|
|
/**
|
|
* Get the dimensions of the container
|
|
* @param aWidth return value for width of container
|
|
* @param aHeight return value for height of container
|
|
*/
|
|
NS_IMETHOD GetContainerSize(nscoord *aWidth, nscoord *aHeight) const = 0;
|
|
|
|
/**
|
|
* Set the view that we are scrolling within the scrolling view.
|
|
*/
|
|
NS_IMETHOD SetScrolledView(nsIView *aScrolledView) = 0;
|
|
|
|
/**
|
|
* Get the view that we are scrolling within the scrolling view.
|
|
* @result child view
|
|
*/
|
|
NS_IMETHOD GetScrolledView(nsIView *&aScrolledView) const = 0;
|
|
|
|
/**
|
|
* Select whether quality level should be displayed in view frame
|
|
* @param aShow if PR_TRUE, quality level will be displayed, else hidden
|
|
*/
|
|
NS_IMETHOD ShowQuality(PRBool aShow) = 0;
|
|
|
|
/**
|
|
* Query whether quality level should be displayed in view frame
|
|
* @return if PR_TRUE, quality level will be displayed, else hidden
|
|
*/
|
|
NS_IMETHOD GetShowQuality(PRBool &aShow) const = 0;
|
|
|
|
/**
|
|
* Select whether quality level should be displayed in view frame
|
|
* @param aShow if PR_TRUE, quality level will be displayed, else hidden
|
|
*/
|
|
NS_IMETHOD SetQuality(nsContentQuality aQuality) = 0;
|
|
|
|
/**
|
|
* Select whether scroll bars should be displayed all the time, never or
|
|
* only when necessary.
|
|
* @param aPref desired scrollbar selection
|
|
*/
|
|
NS_IMETHOD SetScrollPreference(nsScrollPreference aPref) = 0;
|
|
|
|
/**
|
|
* Query whether scroll bars should be displayed all the time, never or
|
|
* only when necessary.
|
|
* @return current scrollbar selection
|
|
*/
|
|
NS_IMETHOD GetScrollPreference(nsScrollPreference& aScrollPreference) const = 0;
|
|
|
|
/**
|
|
* Get the position of the scrolled view.
|
|
*/
|
|
NS_IMETHOD GetScrollPosition(nscoord &aX, nscoord& aY) const = 0;
|
|
|
|
/**
|
|
* Scroll the view to the given x,y, update's the scrollbar's thumb
|
|
* positions and the view's offset. Clamps the values to be
|
|
* legal. Updates the display based on aUpdateFlags.
|
|
* @param aX left edge to scroll to
|
|
* @param aY top edge to scroll to
|
|
* @param aUpdateFlags passed onto nsIViewManager->UpdateView()
|
|
* @return error status
|
|
*/
|
|
NS_IMETHOD ScrollTo(nscoord aX, nscoord aY, PRUint32 aUpdateFlags) = 0;
|
|
|
|
/**
|
|
* Set the amount to inset when positioning the scrollbars and clip view
|
|
*/
|
|
NS_IMETHOD SetControlInsets(const nsMargin &aInsets) = 0;
|
|
|
|
/**
|
|
* Get the amount to inset when positioning the scrollbars and clip view
|
|
*/
|
|
NS_IMETHOD GetControlInsets(nsMargin &aInsets) const = 0;
|
|
|
|
/**
|
|
* Get information about whether the vertical and horizontal scrollbars
|
|
* are currently visible
|
|
*/
|
|
NS_IMETHOD GetScrollbarVisibility(PRBool *aVerticalVisible,
|
|
PRBool *aHorizontalVisible) const = 0;
|
|
|
|
/**
|
|
* Set the properties describing how scrolling can be performed
|
|
* in this scrollable.
|
|
* @param aProperties new properties
|
|
* @return error status
|
|
*/
|
|
NS_IMETHOD SetScrollProperties(PRUint32 aProperties) = 0;
|
|
|
|
/**
|
|
* Get the properties describing how scrolling can be performed
|
|
* in this scrollable.
|
|
* @param aProperties out parameter for current properties
|
|
* @return error status
|
|
*/
|
|
NS_IMETHOD GetScrollProperties(PRUint32 *aProperties) = 0;
|
|
|
|
/**
|
|
* Set the height of a line used for line scrolling.
|
|
* @param aHeight new line height in app units. the default
|
|
* height is 12 points.
|
|
* @return error status
|
|
*/
|
|
NS_IMETHOD SetLineHeight(nscoord aHeight) = 0;
|
|
|
|
/**
|
|
* Get the height of a line used for line scrolling.
|
|
* @param aHeight out parameter for line height
|
|
* @return error status
|
|
*/
|
|
NS_IMETHOD GetLineHeight(nscoord *aHeight) = 0;
|
|
|
|
/**
|
|
* Scroll the view up or down by aNumLines lines. positive
|
|
* values move down in the view. Prevents scrolling off the
|
|
* end of the view.
|
|
* @param aNumLines number of lines to scroll the view by
|
|
* @return error status
|
|
*/
|
|
NS_IMETHOD ScrollByLines(PRInt32 aNumLinesX, PRInt32 aNumLinexY) = 0;
|
|
|
|
/**
|
|
* Scroll the view up or down by aNumPages pages. a page
|
|
* is considered to be the amount displayed by the clip view.
|
|
* positive values move down in the view. Prevents scrolling
|
|
* off the end of the view.
|
|
* @param aNumPage number of pages to scroll the view by
|
|
* @return error status
|
|
*/
|
|
NS_IMETHOD ScrollByPages(PRInt32 aNumPages) = 0;
|
|
|
|
/**
|
|
* Scroll the view to the top or bottom of the document depending
|
|
* on the value of aTop.
|
|
* @param aForward indicates whether to scroll to top or bottom
|
|
* @return error status
|
|
*/
|
|
NS_IMETHOD ScrollByWhole(PRBool aTop) = 0;
|
|
|
|
/**
|
|
* Returns the clip view
|
|
*/
|
|
NS_IMETHOD GetClipView(const nsIView** aClipView) const = 0;
|
|
|
|
/**
|
|
* Adds a scroll position listener.
|
|
*/
|
|
NS_IMETHOD AddScrollPositionListener(nsIScrollPositionListener* aListener) = 0;
|
|
|
|
/**
|
|
* Removes a scroll position listener.
|
|
*/
|
|
NS_IMETHOD RemoveScrollPositionListener(nsIScrollPositionListener* aListener) = 0;
|
|
};
|
|
|
|
//regardless of the transparency or opacity settings
|
|
//for this view, it can always be scrolled via a blit
|
|
#define NS_SCROLL_PROPERTY_ALWAYS_BLIT 0x0001
|
|
|
|
//regardless of the transparency or opacity settings
|
|
//for this view, it can never be scrolled via a blit
|
|
#define NS_SCROLL_PROPERTY_NEVER_BLIT 0x0002
|
|
|
|
#endif
|