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/* vim: se cin sw=2 ts=2 et : */
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsISupports.idl"
interface nsIDocShell;
interface nsITaskbarPreview;
interface nsITaskbarPreviewButton;
/**
* nsITaskbarPreviewController
*
* nsITaskbarPreviewController provides the behavior for the taskbar previews.
* Its methods and properties are used by nsITaskbarPreview. Clients are
* intended to provide their own implementation of this interface. Depending on
* the interface the controller is attached to, only certain methods/attributes
* are required to be implemented.
*/
[scriptable, uuid(4FC0AFBB-3E22-4FBA-AC21-953350AF0411)]
interface nsITaskbarPreviewController : nsISupports
{
/**
* The width of the preview image. This value is allowed to change at any
* time. See drawPreview for more information.
*/
readonly attribute unsigned long width;
/**
* The height of the preview image. This value is allowed to change at any
* time. See drawPreview for more information.
*/
readonly attribute unsigned long height;
/**
* The aspect ratio of the thumbnail - this does not need to match the ratio
* of the preview. This value is allowed to change at any time. See
* drawThumbnail for more information.
*/
readonly attribute float thumbnailAspectRatio;
/**
* Invoked by nsITaskbarPreview when it needs to render the preview. The
* context is attached to a surface with the controller's width and height
* which are obtained immediately before the call.
*
* Note that the context is not attached to a canvas element.
*
* @param ctx Canvas drawing context
*/
boolean drawPreview(in nsISupports ctx);
/**
* Invoked by the taskbar preview when it needs to draw the thumbnail in the
* taskbar's application preview window.
*
* Note: it is guaranteed that width/height == thumbnailAspectRatio
* (modulo rounding errors)
*
* Also note that the context is not attached to a canvas element.
*
* @param ctx Canvas drawing context
* @param width The width of the surface backing the drawing context
* @param height The height of the surface backing the drawing context
*/
boolean drawThumbnail(in nsISupports ctx, in unsigned long width, in unsigned long height);
/**
* Invoked when the user presses the close button on the tab preview.
*/
void onClose();
/**
* Invoked when the user clicks on the tab preview.
*
* @return true if the top level window corresponding to the preview should
* be activated, false if activation is not accepted.
*/
boolean onActivate();
/**
* Invoked when one of the buttons on the window preview's toolbar is pressed.
*
* @param button The button that was pressed. This can be compared with the
* buttons returned by nsITaskbarWindowPreview.getButton.
*/
void onClick(in nsITaskbarPreviewButton button);
};
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