34326da778
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71034 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
659 lines
21 KiB
Objective-C
659 lines
21 KiB
Objective-C
/////////////////////////////////////////////////////////////////////////////
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// Name: webview.h
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// Purpose: interface of wxWebView
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// Author: wxWidgets team
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// RCS-ID: $Id$
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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/**
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Zoom levels available in wxWebView
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*/
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enum wxWebViewZoom
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{
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wxWEB_VIEW_ZOOM_TINY,
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wxWEB_VIEW_ZOOM_SMALL,
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wxWEB_VIEW_ZOOM_MEDIUM, //!< default size
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wxWEB_VIEW_ZOOM_LARGE,
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wxWEB_VIEW_ZOOM_LARGEST
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};
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/**
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The type of zooming that the web view control can perform
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*/
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enum wxWebViewZoomType
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{
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/**
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The entire layout scales when zooming, including images
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*/
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wxWEB_VIEW_ZOOM_TYPE_LAYOUT,
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/**
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Only the text changes in size when zooming, images and other layout
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elements retain their initial size
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*/
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wxWEB_VIEW_ZOOM_TYPE_TEXT
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};
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/**
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Types of errors that can cause navigation to fail
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*/
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enum wxWebViewNavigationError
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{
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/** Connection error (timeout, etc.) */
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wxWEB_NAV_ERR_CONNECTION,
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/** Invalid certificate */
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wxWEB_NAV_ERR_CERTIFICATE,
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/** Authentication required */
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wxWEB_NAV_ERR_AUTH,
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/** Other security error */
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wxWEB_NAV_ERR_SECURITY,
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/** Requested resource not found */
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wxWEB_NAV_ERR_NOT_FOUND,
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/** Invalid request/parameters (e.g. bad URL, bad protocol,
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unsupported resource type) */
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wxWEB_NAV_ERR_REQUEST,
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/** The user cancelled (e.g. in a dialog) */
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wxWEB_NAV_ERR_USER_CANCELLED,
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/** Another (exotic) type of error that didn't fit in other categories*/
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wxWEB_NAV_ERR_OTHER
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};
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/**
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Type of refresh
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*/
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enum wxWebViewReloadFlags
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{
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/** Default reload, will access cache */
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wxWEB_VIEW_RELOAD_DEFAULT,
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/** Reload the current view without accessing the cache */
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wxWEB_VIEW_RELOAD_NO_CACHE
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};
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/**
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* List of available backends for wxWebView
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*/
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enum wxWebViewBackend
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{
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/** Value that may be passed to wxWebView to let it pick an appropriate
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* engine for the current platform*/
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wxWEB_VIEW_BACKEND_DEFAULT,
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/** The WebKit web engine */
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wxWEB_VIEW_BACKEND_WEBKIT,
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/** Use Microsoft Internet Explorer as web engine */
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wxWEB_VIEW_BACKEND_IE
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};
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/**
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@class wxWebViewHistoryItem
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A simple class that contains the URL and title of an element of the history
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of a wxWebView.
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@since 2.9.3
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@library{wxwebview}
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@category{webview}
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@see wxWebView
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*/
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class wxWebViewHistoryItem
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{
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public:
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/**
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Construtor.
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*/
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wxWebViewHistoryItem(const wxString& url, const wxString& title);
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/**
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@return The url of the page.
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*/
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wxString GetUrl();
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/**
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@return The title of the page.
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*/
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wxString GetTitle();
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};
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/**
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@class wxWebViewHandler
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The base class for handling custom schemes in wxWebView, for example to
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allow virtual file system support.
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@since 2.9.3
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@library{wxwebview}
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@category{webview}
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@see wxWebView
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*/
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class wxWebViewHandler
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{
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public:
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/**
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Constructor. Takes the name of the scheme that will be handled by this
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class for example @c file or @c zip.
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*/
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wxWebViewHandler(const wxString& scheme);
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/**
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@return A pointer to the file represented by @c uri.
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*/
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virtual wxFSFile* GetFile(const wxString &uri) = 0;
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/**
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@return The name of the scheme, as passed to the constructor.
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*/
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virtual wxString GetName() const;
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};
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/**
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@class wxWebView
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This control may be used to render web (HTML / CSS / javascript) documents.
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It is designed to allow the creation of multiple backends for each port,
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although currently just one is available. It differs from wxHtmlWindow in
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that each backend is actually a full rendering engine, Trident on MSW and
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Webkit on OSX and GTK. This allows the correct viewing complex pages with
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javascript and css.
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@section descriptions Backend Descriptions
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@par wxWEB_VIEW_BACKEND_IE (MSW)
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The IE backend uses Microsoft's Trident rendering engine, specifically the
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version used by the locally installed copy of Internet Explorer. As such it
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is only available for the MSW port. By default recent versions of the
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<a href="http://msdn.microsoft.com/en-us/library/aa752085%28v=VS.85%29.aspx">WebBrowser</a>
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control, which this backend uses, emulate Internet Explorer 7. This can be
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changed with a registry setting, see
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<a href="http://msdn.microsoft.com/en-us/library/ee330730%28v=vs.85%29.aspx#browser_emulation">
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this</a> article for more information. This backend has full support for
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custom schemes and virtual file systems.
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@par wxWEB_VIEW_WEBKIT (GTK)
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Under GTK the WebKit backend uses
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<a href="http://webkitgtk.org/">WebKitGTK+</a>. The current minimum version
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required is 1.3.1 which ships by default with Ubuntu Natty and Debian
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Wheezy and has the package name libwebkitgtk-dev. Custom schemes and
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virtual files systems are supported under this backend, however embedded
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resources such as images and stylesheets are currently loaded using the
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data:// scheme.
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@par wxWEB_VIEW_WEBKIT (OSX)
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The OSX WebKit backend uses Apple's
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<a href="http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/WebKit/Classes/WebView_Class/Reference/Reference.html#//apple_ref/doc/uid/20001903">WebView</a>
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class. This backend has full support for custom schemes and virtual file
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systems.
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@section async Asynchronous Notifications
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Many of the methods in wxWebView are asynchronous, i.e. they return
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immediately and perform their work in the background. This includes
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functions such as LoadUrl() and Reload(). To receive notification of the
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progress and completion of these functions you need to handle the events
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that are provided. Specifically @c wxEVT_COMMAND_WEB_VIEW_LOADED notifies
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when the page or a sub-frame has finished loading and
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@c wxEVT_COMMAND_WEB_VIEW_ERROR notifies that an error has occurred.
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@section vfs Virtual File Systems and Custom Schemes
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wxWebView supports the registering of custom scheme handlers, for example
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@c file or @c http. To do this create a new class which inherits from
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wxWebViewHandler, where wxWebHandler::GetFile() returns a pointer to a
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wxFSFile which represents the given url. You can then register your handler
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with RegisterHandler() it will be called for all pages and resources.
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wxWebFileHandler is provided to allow the navigation of pages inside a zip
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archive. It overrides the @c file scheme and provides support for the
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standard @c file syntax as well as paths to archives of the form
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@c file:///C:/example/docs.zip;protocol=zip/main.htm
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@beginEventEmissionTable{wxWebViewEvent}
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@event{EVT_WEB_VIEW_NAVIGATING(id, func)}
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Process a @c wxEVT_COMMAND_WEB_VIEW_NAVIGATING event, generated before trying
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to get a resource. This event may be vetoed to prevent navigating to this
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resource. Note that if the displayed HTML document has several frames, one
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such event will be generated per frame.
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@event{EVT_WEB_VIEW_NAVIGATED(id, func)}
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Process a @c wxEVT_COMMAND_WEB_VIEW_NAVIGATED event generated after it was
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confirmed that a resource would be requested. This event may not be vetoed.
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Note that if the displayed HTML document has several frames, one such event
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will be generated per frame.
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@event{EVT_WEB_VIEW_LOADED(id, func)}
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Process a @c wxEVT_COMMAND_WEB_VIEW_LOADED event generated when the document
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is fully loaded and displayed. Note that if the displayed HTML document has
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several frames, one such event will be generated per frame.
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@event{EVT_WEB_VIEW_ERROR(id, func)}
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Process a @c wxEVT_COMMAND_WEB_VIEW_ERROR event generated when a navigation
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error occurs.
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The integer associated with this event will be a wxWebNavigationError item.
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The string associated with this event may contain a backend-specific more
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precise error message/code.
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@event{EVT_WEB_VIEW_NEWWINDOW(id, func)}
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Process a @c wxEVT_COMMAND_WEB_VIEW_NEWWINDOW event, generated when a new
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window is created. You must handle this event if you want anything to
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happen, for example to load the page in a new window or tab.
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@event{EVT_WEB_VIEW_TITLE_CHANGED(id, func)}
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Process a @c wxEVT_COMMAND_WEB_VIEW_TITLE_CHANGED event, generated when
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the page title changes. Use GetString to get the title.
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@endEventTable
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@since 2.9.3
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@library{wxwebview}
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@category{ctrl,webview}
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@see wxWebViewHandler, wxWebViewEvent
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*/
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class wxWebView : public wxControl
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{
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public:
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/**
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Creation function for two-step creation.
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*/
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virtual bool Create(wxWindow* parent,
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wxWindowID id,
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const wxString& url = wxWebViewDefaultURLStr,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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long style = 0,
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const wxString& name = wxWebViewNameStr) = 0;
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/**
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Factory function to create a new wxWebView for two-step creation
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(you need to call wxWebView::Create on the returned object)
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@param backend which web engine to use as backend for wxWebView
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@return the created wxWebView, or NULL if the requested backend is
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not available
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*/
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static wxWebView* New(wxWebViewBackend backend = wxWEB_VIEW_BACKEND_DEFAULT);
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/**
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Factory function to create a new wxWebView
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@param parent parent window to create this view in
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@param id ID of this control
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@param url URL to load by default in the web view
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@param pos position to create this control at
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(you may use wxDefaultPosition if you use sizers)
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@param size size to create this control with
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(you may use wxDefaultSize if you use sizers)
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@param backend which web engine to use as backend for wxWebView
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@return the created wxWebView, or NULL if the requested backend
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is not available
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*/
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static wxWebView* New(wxWindow* parent,
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wxWindowID id,
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const wxString& url = wxWebViewDefaultURLStr,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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wxWebViewBackend backend = wxWEB_VIEW_BACKEND_DEFAULT,
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long style = 0,
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const wxString& name = wxWebViewNameStr);
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/**
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Get the title of the current web page, or its URL/path if title is not
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available.
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*/
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virtual wxString GetCurrentTitle() const = 0;
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/**
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Get the URL of the currently displayed document.
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*/
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virtual wxString GetCurrentURL() const = 0;
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/**
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Get the HTML source code of the currently displayed document.
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@return The HTML source code, or an empty string if no page is currently
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shown.
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*/
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virtual wxString GetPageSource() const = 0;
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/**
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Get the text of the current page.
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*/
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virtual wxString GetPageText() const = 0;
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/**
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Returns whether the web control is currently busy (e.g. loading a page).
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*/
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virtual bool IsBusy() const = 0;
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/**
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Returns whether the web control is currently editable
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*/
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virtual bool IsEditable() const = 0;
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/**
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Load a web page from a URL
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@param url The URL of the page to be loaded.
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@note Web engines generally report errors asynchronously, so if you wish
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to know whether loading the URL was successful, register to receive
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navigation error events.
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*/
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virtual void LoadURL(const wxString& url) = 0;
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/**
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Opens a print dialog so that the user may print the currently
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displayed page.
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*/
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virtual void Print() = 0;
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/**
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Registers a custom scheme handler.
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@param handler A shared pointer to a wxWebHandler.
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*/
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virtual void RegisterHandler(wxSharedPtr<wxWebViewHandler> handler) = 0;
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/**
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Reload the currently displayed URL.
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@param flags A bit array that may optionally contain reload options.
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*/
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virtual void Reload(wxWebViewReloadFlags flags = wxWEB_VIEW_RELOAD_DEFAULT) = 0;
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/**
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Runs the given javascript code.
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*/
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virtual void RunScript(const wxString& javascript) = 0;
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/**
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Set the editable property of the web control. Enabling allows the user
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to edit the page even if the @c contenteditable attribute is not set.
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The exact capabilities vary with the backend being used.
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*/
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virtual void SetEditable(bool enable = true) = 0;
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/**
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Set the displayed page source to the contents of the given string.
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@param html The string that contains the HTML data to display.
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@param baseUrl URL assigned to the HTML data, to be used to resolve
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relative paths, for instance.
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*/
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virtual void SetPage(const wxString& html, const wxString& baseUrl) = 0;
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/**
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Set the displayed page source to the contents of the given stream.
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@param html The stream to read HTML data from.
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@param baseUrl URL assigned to the HTML data, to be used to resolve
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relative paths, for instance.
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*/
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virtual void SetPage(wxInputStream& html, wxString baseUrl);
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/**
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Stop the current page loading process, if any.
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May trigger an error event of type @c wxWEB_NAV_ERR_USER_CANCELLED.
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TODO: make @c wxWEB_NAV_ERR_USER_CANCELLED errors uniform across ports.
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*/
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virtual void Stop() = 0;
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/**
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@name Clipboard
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*/
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/**
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Returns @true if the current selection can be copied.
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@note This always returns @c true on the OSX WebKit backend.
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*/
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virtual bool CanCopy() const = 0;
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/**
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Returns @true if the current selection can be cut.
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@note This always returns @c true on the OSX WebKit backend.
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*/
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virtual bool CanCut() const = 0;
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/**
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Returns @true if data can be pasted.
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@note This always returns @c true on the OSX WebKit backend.
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*/
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virtual bool CanPaste() const = 0;
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/**
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Copies the current selection.
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*/
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virtual void Copy() = 0;
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/**
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Cuts the current selection.
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*/
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virtual void Cut() = 0;
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/**
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Pastes the current data.
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*/
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virtual void Paste() = 0;
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/**
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@name History
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*/
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/**
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Returns @true if it is possible to navigate backward in the history of
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visited pages.
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*/
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virtual bool CanGoBack() const = 0;
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/**
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Returns @true if it is possible to navigate forward in the history of
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visited pages.
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*/
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virtual bool CanGoForward() const = 0;
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/**
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Clear the history, this will also remove the visible page.
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*/
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virtual void ClearHistory() = 0;
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/**
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Enable or disable the history. This will also clear the history.
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*/
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virtual void EnableHistory(bool enable = true) = 0;
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/**
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Returns a list of items in the back history. The first item in the
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vector is the first page that was loaded by the control.
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*/
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virtual wxVector<wxSharedPtr<wxWebViewHistoryItem> > GetBackwardHistory() = 0;
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/**
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Returns a list of items in the forward history. The first item in the
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vector is the next item in the history with respect to the curently
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loaded page.
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*/
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virtual wxVector<wxSharedPtr<wxWebViewHistoryItem> > GetForwardHistory() = 0;
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/**
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Navigate back in the history of visited pages.
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Only valid if CanGoBack() returns true.
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*/
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virtual void GoBack() = 0;
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/**
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Navigate forward in the history of visited pages.
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Only valid if CanGoForward() returns true.
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*/
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virtual void GoForward() = 0;
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/**
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Loads a history item.
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*/
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virtual void LoadHistoryItem(wxSharedPtr<wxWebViewHistoryItem> item) = 0;
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/**
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@name Selection
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*/
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/**
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Clears the current selection.
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*/
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virtual void ClearSelection() = 0;
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/**
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Deletes the current selection. Note that for @c wxWEB_VIEW_BACKEND_WEBKIT
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the selection must be editable, either through SetEditable or the
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correct HTML attribute.
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*/
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virtual void DeleteSelection() = 0;
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/**
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Returns the currently selected source, if any.
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*/
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virtual wxString GetSelectedSource() const = 0;
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/**
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Returns the currently selected text, if any.
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*/
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virtual wxString GetSelectedText() const = 0;
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/**
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Returns @true if there is a current selection.
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*/
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virtual bool HasSelection() const = 0;
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/**
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Selects the entire page.
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*/
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virtual void SelectAll() = 0;
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/**
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@name Undo / Redo
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*/
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/**
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Returns @true if there is an action to redo.
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*/
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virtual bool CanRedo() const = 0;
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/**
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Returns @true if there is an action to undo.
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*/
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virtual bool CanUndo() const = 0;
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/**
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Redos the last action.
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*/
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virtual void Redo() = 0;
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/**
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Undos the last action.
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*/
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virtual void Undo() = 0;
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/**
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@name Zoom
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*/
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/**
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Retrieve whether the current HTML engine supports a zoom type.
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@param type The zoom type to test.
|
|
@return Whether this type of zoom is supported by this HTML engine
|
|
(and thus can be set through SetZoomType()).
|
|
*/
|
|
virtual bool CanSetZoomType(wxWebViewZoomType type) const = 0;
|
|
|
|
/**
|
|
Get the zoom factor of the page.
|
|
@return The current level of zoom.
|
|
*/
|
|
virtual wxWebViewZoom GetZoom() const = 0;
|
|
|
|
/**
|
|
Get how the zoom factor is currently interpreted.
|
|
@return How the zoom factor is currently interpreted by the HTML engine.
|
|
*/
|
|
virtual wxWebViewZoomType GetZoomType() const = 0;
|
|
|
|
/**
|
|
Set the zoom factor of the page.
|
|
@param zoom How much to zoom (scale) the HTML document.
|
|
*/
|
|
virtual void SetZoom(wxWebViewZoom zoom) = 0;
|
|
|
|
/**
|
|
Set how to interpret the zoom factor.
|
|
@param zoomType How the zoom factor should be interpreted by the
|
|
HTML engine.
|
|
@note invoke CanSetZoomType() first, some HTML renderers may not
|
|
support all zoom types.
|
|
*/
|
|
virtual void SetZoomType(wxWebViewZoomType zoomType) = 0;
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
@class wxWebViewEvent
|
|
|
|
A navigation event holds information about events associated with
|
|
wxWebView objects.
|
|
|
|
@beginEventEmissionTable{wxWebViewEvent}
|
|
@event{EVT_WEB_VIEW_NAVIGATING(id, func)}
|
|
Process a @c wxEVT_COMMAND_WEB_VIEW_NAVIGATING event, generated before trying
|
|
to get a resource. This event may be vetoed to prevent navigating to this
|
|
resource. Note that if the displayed HTML document has several frames, one
|
|
such event will be generated per frame.
|
|
@event{EVT_WEB_VIEW_NAVIGATED(id, func)}
|
|
Process a @c wxEVT_COMMAND_WEB_VIEW_NAVIGATED event generated after it was
|
|
confirmed that a resource would be requested. This event may not be vetoed.
|
|
Note that if the displayed HTML document has several frames, one such event
|
|
will be generated per frame.
|
|
@event{EVT_WEB_VIEW_LOADED(id, func)}
|
|
Process a @c wxEVT_COMMAND_WEB_VIEW_LOADED event generated when the document
|
|
is fully loaded and displayed. Note that if the displayed HTML document has
|
|
several frames, one such event will be generated per frame.
|
|
@event{EVT_WEB_VIEW_ERROR(id, func)}
|
|
Process a @c wxEVT_COMMAND_WEB_VIEW_ERROR event generated when a navigation
|
|
error occurs.
|
|
The integer associated with this event will be a wxWebNavigationError item.
|
|
The string associated with this event may contain a backend-specific more
|
|
precise error message/code.
|
|
@event{EVT_WEB_VIEW_NEWWINDOW(id, func)}
|
|
Process a @c wxEVT_COMMAND_WEB_VIEW_NEWWINDOW event, generated when a new
|
|
window is created. You must handle this event if you want anything to
|
|
happen, for example to load the page in a new window or tab.
|
|
@event{EVT_WEB_VIEW_TITLE_CHANGED(id, func)}
|
|
Process a @c wxEVT_COMMAND_WEB_VIEW_TITLE_CHANGED event, generated when
|
|
the page title changes. Use GetString to get the title.
|
|
@endEventTable
|
|
|
|
@since 2.9.3
|
|
@library{wxwebview}
|
|
@category{events,webview}
|
|
|
|
@see wxWebView
|
|
*/
|
|
class wxWebViewEvent : public wxNotifyEvent
|
|
{
|
|
public:
|
|
wxWebViewEvent();
|
|
wxWebViewEvent(wxEventType type, int id, const wxString href,
|
|
const wxString target);
|
|
|
|
/**
|
|
Get the name of the target frame which the url of this event
|
|
has been or will be loaded into. This may return an emptry string
|
|
if the frame is not available.
|
|
*/
|
|
const wxString& GetTarget() const;
|
|
|
|
/**
|
|
Get the URL being visited
|
|
*/
|
|
const wxString& GetURL() const;
|
|
};
|
|
|
|
|
|
wxEventType wxEVT_COMMAND_WEB_VIEW_NAVIGATING;
|
|
wxEventType wxEVT_COMMAND_WEB_VIEW_NAVIGATED;
|
|
wxEventType wxEVT_COMMAND_WEB_VIEW_LOADED;
|
|
wxEventType wxEVT_COMMAND_WEB_VIEW_ERROR;
|
|
wxEventType wxEVT_COMMAND_WEB_VIEW_NEWWINDOW;
|
|
wxEventType wxEVT_COMMAND_WEB_VIEW_TITLE_CHANGED;
|