ginebra2/chrome/bedrockchrome/zoombar.snippet/zoombar.js
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 06 Jul 2010 14:03:49 +0300
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/*!
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  \file zoombar.js This module contains the ZoomBar class.
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*/
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/*!
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  Class to handle displaying the zoom bar. The zoom bar is displayed when the
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  user presses the zoom button on the toolbar. It provides access to the zoom
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  in and out functions. It is hidden when the main toolbar is hidden on user inactivity
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  and on timer maintained by native code
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*/
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function ZoomBar()
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{
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    var enabled = true; // zooming enabled flag - initially enabled
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    // Private Methods
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    //! Write zoom bar HTML code to document.
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    function _zoombar_write() {
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        var html = ''+
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            '<div id="zoomBarDiv">'+
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            '<div class = "GinebraSnippet zoomBarBtn" id="zoomBarBtnIn" data-GinebraVisible="false" data-GinebraHidesContent="true"   data-GinebraNativeClass="ActionButton"> </div>'+
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            '<div class = "GinebraSnippet zoomBarBtn" id="zoomBarBtnOut" data-GinebraVisible="false" data-GinebraHidesContent="true"   data-GinebraNativeClass="ActionButton"> </div>'+
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            '</div>';
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        document.write(html);
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    }
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    //! Create zoom in & out buttons.
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    function _setActions() {
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        snippets.zoomBarBtnIn.connectAction("zoomIn", "WebView", true, true);
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        snippets.zoomBarBtnOut.connectAction("zoomOut", "WebView",  true, true);
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        snippets.zoomBarBtnIn.setIcon(":/chrome/bedrockchrome/zoombar.snippet/icons/icon_zoom+.png");
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        snippets.zoomBarBtnIn.setActiveIcon(":/chrome/bedrockchrome/zoombar.snippet/icons/icon_zoom+_pressed.png");
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        snippets.zoomBarBtnIn.setDisabledIcon(":/chrome/bedrockchrome/zoombar.snippet/icons/icon_zoom+_disabled.png");
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        snippets.zoomBarBtnOut.setIcon(":/chrome/bedrockchrome/zoombar.snippet/icons/icon_zoom-.png");
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        snippets.zoomBarBtnOut.setActiveIcon(":/chrome/bedrockchrome/zoombar.snippet/icons/icon_zoom-_pressed.png");
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        snippets.zoomBarBtnOut.setDisabledIcon(":/chrome/bedrockchrome/zoombar.snippet/icons/icon_zoom-_disabled.png");
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        // Connect to each action's "changed" signal.
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        window.views.WebView.actions.zoomIn.changed.connect(
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            createDelegate(this, handleChange));
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        window.views.WebView.actions.zoomOut.changed.connect(
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            createDelegate(this, handleChange));
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    }
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    //! Handle action object changes. In particular we are interested in
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    //! changes to the enabled state of the object.
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    function handleChange() {
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        var saveEnabled = enabled;
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        // enable zoom button if either zoom-in or zoom-out action enabled
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        if (window.views.WebView.actions.zoomIn.enabled
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            || window.views.WebView.actions.zoomOut.enabled) {
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            enabled = true;
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        } else {
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            enabled = false;
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        }
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        // if state changed update web toolbar zoom button state
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        if (saveEnabled != enabled) {
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            // enabled state changed
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            window.snippets.ZoomButtonSnippet.setEnabled(enabled);
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        }
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    }
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    //! After chrome is loaded, create zoombar buttons and setup show/hide
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    //! handlers.
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    function _chromeLoadComplete() {
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        _setActions();
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    }
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    _zoombar_write();
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    window.chrome.chromeComplete.connect(_chromeLoadComplete);
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}
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