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<html><head><title>mxPanningHandler</title><link rel="stylesheet" type="text/css" href="../../styles/main.css"><script language=JavaScript src="../../javascript/main.js"></script><script language=JavaScript src="../../javascript/prettify.js"></script><script language=JavaScript src="../../javascript/searchdata.js"></script></head><body class="ContentPage" onLoad="NDOnLoad();prettyPrint();"><script language=JavaScript><!--
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<div id=Content><div class="CClass"><div class=CTopic id=MainTopic><h1 class=CTitle><a name="mxPanningHandler"></a>mxPanningHandler</h1><div class=CBody><p>Event handler that pans and creates popupmenus. To use the left mousebutton for panning without interfering with cell moving and resizing, use <isUseLeftButton> and <isIgnoreCell>. For grid size steps while panning, use <a href="#mxPanningHandler.useGrid" class=LVariable id=link25 onMouseOver="ShowTip(event, 'tt10', 'link25')" onMouseOut="HideTip('tt10')">useGrid</a>. This handler is built-into <mxGraph.panningHandler> and enabled using <a href="../view/mxGraph-js.html#mxGraph.setPanning" class=LFunction id=link26 onMouseOver="ShowTip(event, 'tt22', 'link26')" onMouseOut="HideTip('tt22')">mxGraph.setPanning</a>.</p><!--START_ND_SUMMARY--><div class=Summary><div class=STitle>Summary</div><div class=SBorder><table border=0 cellspacing=0 cellpadding=0 class=STable><tr class="SMain"><td class=SEntry><a href="#mxPanningHandler" >mxPanningHandler</a></td><td class=SDescription>Event handler that pans and creates popupmenus. </td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#mxPanningHandler.Functions" >Functions</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#mxPanningHandler.mxPanningHandler" >mxPanningHandler</a></td><td class=SDescription>Constructs an event handler that creates a <a href="../util/mxPopupMenu-js.html#mxPopupMenu" class=LClass id=link1 onMouseOver="ShowTip(event, 'tt1', 'link1')" onMouseOut="HideTip('tt1')">mxPopupMenu</a> and pans the graph.</td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#mxPanningHandler.Events" >Events</a></td><td class=SDescription></td></tr><tr class="SEvent SIndent2 SMarked"><td class=SEntry><a href="#mxPanningHandler.mxEvent.PAN_START" >mxEvent.<wbr>PAN_START</a></td><td class=SDescription>Fires when the panning handler changes its <active> state to true. </td></tr><tr class="SEvent SIndent2"><td class=SEntry><a href="#mxPanningHandler.mxEvent.PAN" >mxEvent.PAN</a></td><td class=SDescription>Fires while handle is processing events. </td></tr><tr class="SEvent SIndent2 SMarked"><td class=SEntry><a href="#mxPanningHandler.mxEvent.PAN_END" >mxEvent.<wbr>PAN_END</a></td><td class=SDescription>Fires when the panning handler changes its <active> state to false. </td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#mxPanningHandler.Variables" >Variables</a></td><td class=SDescription></td></tr><tr class="SVariable SIndent2 SMarked"><td class=SEntry><a href="#mxPanningHandler.graph" id=link2 onMouseOver="ShowTip(event, 'tt2', 'link2')" onMouseOut="HideTip('tt2')">graph</a></td><td class=SDescription>Reference to the enclosing <a href="../view/mxGraph-js.html#mxGraph" class=LClass id=link3 onMouseOver="ShowTip(event, 'tt3', 'link3')" onMouseOut="HideTip('tt3')">mxGraph</a>.</td></tr><tr class="SVariable SIndent2"><td class=SEntry><a href="#mxPanningHandler.usePopupTrigger" id=link4 onMouseOver="ShowTip(event, 'tt4', 'link4')" onMouseOut="HideTip('tt4')">usePopupTrigger</a></td><td class=SDescription>Specifies if the <isPopupTrigger> should also be used for panning. </td></tr><tr class="SVariable SIndent2 SMarked"><td class=SEntry><a href="#mxPanningHandler.useLeftButtonForPanning" id=link5 onMouseOver="ShowTip(event, 'tt5', 'link5')" onMouseOut="HideTip('tt5')">useLeftButtonForPanning</a></td><td class=SDescription>Specifies if panning should be active for the left mouse button. </td></tr><tr class="SVariable SIndent2"><td class=SEntry><a href="#mxPanningHandler.selectOnPopup" id=link6 onMouseOver="ShowTip(event, 'tt6', 'link6')" onMouseOut="HideTip('tt6')">selectOnPopup</a></td><td class=SDescription>Specifies if cells should be selected if a popupmenu is displayed for them. </td></tr><tr class="SVariable SIndent2 SMarked"><td class=SEntry><a href="#mxPanningHandler.clearSelectionOnBackground" id=link7 onMouseOver="ShowTip(event, 'tt7', 'link7')" onMouseOut="HideTip('tt7')">clearSelectio
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<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.Functions"></a>Functions</h3></div></div>
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<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.mxPanningHandler"></a>mxPanningHandler</h3><div class=CBody><p>Constructs an event handler that creates a <a href="../util/mxPopupMenu-js.html#mxPopupMenu" class=LClass id=link27 onMouseOver="ShowTip(event, 'tt1', 'link27')" onMouseOut="HideTip('tt1')">mxPopupMenu</a> and pans the graph.</p></div></div></div>
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<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.Events"></a>Events</h3></div></div>
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<div class="CEvent"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.mxEvent.PAN_START"></a>mxEvent.<wbr>PAN_START</h3><div class=CBody><p>Fires when the panning handler changes its <active> state to true. The <code>event</code> property contains the corresponding <a href="../util/mxMouseEvent-js.html#mxMouseEvent" class=LClass id=link28 onMouseOver="ShowTip(event, 'tt23', 'link28')" onMouseOut="HideTip('tt23')">mxMouseEvent</a>.</p></div></div></div>
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<div class="CEvent"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.mxEvent.PAN"></a>mxEvent.PAN</h3><div class=CBody><p>Fires while handle is processing events. The <code>event</code> property contains the corresponding <a href="../util/mxMouseEvent-js.html#mxMouseEvent" class=LClass id=link29 onMouseOver="ShowTip(event, 'tt23', 'link29')" onMouseOut="HideTip('tt23')">mxMouseEvent</a>.</p></div></div></div>
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<div class="CEvent"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.mxEvent.PAN_END"></a>mxEvent.<wbr>PAN_END</h3><div class=CBody><p>Fires when the panning handler changes its <active> state to false. The <code>event</code> property contains the corresponding <a href="../util/mxMouseEvent-js.html#mxMouseEvent" class=LClass id=link30 onMouseOver="ShowTip(event, 'tt23', 'link30')" onMouseOut="HideTip('tt23')">mxMouseEvent</a>.</p></div></div></div>
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<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.Variables"></a>Variables</h3></div></div>
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<div class="CVariable"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.graph"></a>graph</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.graph</td></tr></table></blockquote><p>Reference to the enclosing <a href="../view/mxGraph-js.html#mxGraph" class=LClass id=link31 onMouseOver="ShowTip(event, 'tt3', 'link31')" onMouseOut="HideTip('tt3')">mxGraph</a>.</p></div></div></div>
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<div class="CVariable"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.usePopupTrigger"></a>usePopupTrigger</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.usePopupTrigger</td></tr></table></blockquote><p>Specifies if the <isPopupTrigger> should also be used for panning. To avoid conflicts, the panning is only activated if the mouse was moved more than <a href="../view/mxGraph-js.html#mxGraph.tolerance" class=LVariable id=link32 onMouseOver="ShowTip(event, 'tt24', 'link32')" onMouseOut="HideTip('tt24')">mxGraph.tolerance</a>, otherwise, a single click is assumed and the popupmenu is displayed. Default is true.</p></div></div></div>
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<div class="CVariable"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.useLeftButtonForPanning"></a>useLeftButtonForPanning</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.useLeftButtonForPanning</td></tr></table></blockquote><p>Specifies if panning should be active for the left mouse button. Setting this to true may conflict with <a href="mxRubberband-js.html#mxRubberband" class=LClass id=link33 onMouseOver="ShowTip(event, 'tt25', 'link33')" onMouseOut="HideTip('tt25')">mxRubberband</a>. Default is false.</p></div></div></div>
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<div class="CVariable"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.selectOnPopup"></a>selectOnPopup</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.selectOnPopup</td></tr></table></blockquote><p>Specifies if cells should be selected if a popupmenu is displayed for them. Default is true.</p></div></div></div>
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<div class="CVariable"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.clearSelectionOnBackground"></a>clearSelectionOnBackground</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.clearSelectionOnBackground</td></tr></table></blockquote><p>Specifies if cells should be deselected if a popupmenu is displayed for the diagram background. Default is true.</p></div></div></div>
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<div class="CVariable"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.ignoreCell"></a>ignoreCell</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.ignoreCell</td></tr></table></blockquote><p>Specifies if panning should be active even if there is a cell under the mousepointer. Default is false.</p></div></div></div>
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<div class="CVariable"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.previewEnabled"></a>previewEnabled</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.previewEnabled</td></tr></table></blockquote><p>Specifies if the panning should be previewed. Default is true.</p></div></div></div>
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<div class="CVariable"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.useGrid"></a>useGrid</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.useGrid</td></tr></table></blockquote><p>Specifies if the panning steps should be aligned to the grid size. Default is false.</p></div></div></div>
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<div class="CVariable"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.panningEnabled"></a>panningEnabled</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.panningEnabled</td></tr></table></blockquote><p>Specifies if panning should be enabled. Default is true.</p></div></div></div>
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<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.Functions"></a>Functions</h3></div></div>
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<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.isPanningEnabled"></a>isPanningEnabled</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.isPanningEnabled = function()</td></tr></table></blockquote><p>Returns <a href="#mxPanningHandler.panningEnabled" class=LVariable id=link34 onMouseOver="ShowTip(event, 'tt11', 'link34')" onMouseOut="HideTip('tt11')">panningEnabled</a>.</p></div></div></div>
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<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.setPanningEnabled"></a>setPanningEnabled</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>mxPanningHandler.prototype.setPanningEnabled = function(</td><td class=PParameter nowrap>value</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Sets <a href="#mxPanningHandler.panningEnabled" class=LVariable id=link35 onMouseOver="ShowTip(event, 'tt11', 'link35')" onMouseOut="HideTip('tt11')">panningEnabled</a>.</p></div></div></div>
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<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.init"></a>init</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.init = function()</td></tr></table></blockquote><p>Initializes the shapes required for this vertex handler.</p></div></div></div>
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<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.isPanningTrigger"></a>isPanningTrigger</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>mxPanningHandler.prototype.isPanningTrigger = function(</td><td class=PParameter nowrap>me</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Returns true if the given event is a panning trigger for the optional given cell. This returns true if control-shift is pressed or if <a href="#mxPanningHandler.usePopupTrigger" class=LVariable id=link36 onMouseOver="ShowTip(event, 'tt4', 'link36')" onMouseOut="HideTip('tt4')">usePopupTrigger</a> is true and the event is a popup trigger.</p></div></div></div>
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<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.mouseDown"></a>mouseDown</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>mxPanningHandler.prototype.mouseDown = function(</td><td class=PParameter nowrap>sender,</td></tr><tr><td></td><td class=PParameter nowrap>me</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Handles the event by initiating the panning. By consuming the event all subsequent events of the gesture are redirected to this handler.</p></div></div></div>
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<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.mouseMove"></a>mouseMove</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>mxPanningHandler.prototype.mouseMove = function(</td><td class=PParameter nowrap>sender,</td></tr><tr><td></td><td class=PParameter nowrap>me</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Handles the event by updating the panning on the graph.</p></div></div></div>
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<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.mouseUp"></a>mouseUp</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>mxPanningHandler.prototype.mouseUp = function(</td><td class=PParameter nowrap>sender,</td></tr><tr><td></td><td class=PParameter nowrap>me</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Handles the event by setting the translation on the view or showing the popupmenu.</p></div></div></div>
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<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.getCellForPopupEvent"></a>getCellForPopupEvent</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>mxPanningHandler.prototype.getCellForPopupEvent = function(</td><td class=PParameter nowrap>me</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Hook to return the cell for the mouse up popup trigger handling.</p></div></div></div>
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<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.panGraph"></a>panGraph</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>mxPanningHandler.prototype.panGraph = function(</td><td class=PParameter nowrap>dx,</td></tr><tr><td></td><td class=PParameter nowrap>dy</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Pans <a href="#mxPanningHandler.graph" class=LVariable id=link37 onMouseOver="ShowTip(event, 'tt2', 'link37')" onMouseOut="HideTip('tt2')">graph</a> by the given amount.</p></div></div></div>
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<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="mxPanningHandler.destroy"></a>destroy</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.destroy = function()</td></tr></table></blockquote><p>Destroys the handler and all its resources and DOM nodes.</p></div></div></div>
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var searchPanel = new SearchPanel("searchPanel", "HTML", "../../search");
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<div class=CToolTip id="tt1"><div class=CClass>Event handler that pans and creates popupmenus. </div></div><div class=CToolTip id="tt2"><div class=CVariable><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.graph</td></tr></table></blockquote>Reference to the enclosing mxGraph.</div></div><div class=CToolTip id="tt3"><div class=CClass>Extends mxEventSource to implement a graph component for the browser. </div></div><div class=CToolTip id="tt4"><div class=CVariable><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.usePopupTrigger</td></tr></table></blockquote>Specifies if the isPopupTrigger should also be used for panning. </div></div><div class=CToolTip id="tt5"><div class=CVariable><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.useLeftButtonForPanning</td></tr></table></blockquote>Specifies if panning should be active for the left mouse button. </div></div><div class=CToolTip id="tt6"><div class=CVariable><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.selectOnPopup</td></tr></table></blockquote>Specifies if cells should be selected if a popupmenu is displayed for them. </div></div><div class=CToolTip id="tt7"><div class=CVariable><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.clearSelectionOnBackground</td></tr></table></blockquote>Specifies if cells should be deselected if a popupmenu is displayed for the diagram background. </div></div><div class=CToolTip id="tt8"><div class=CVariable><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.ignoreCell</td></tr></table></blockquote>Specifies if panning should be active even if there is a cell under the mousepointer. </div></div><div class=CToolTip id="tt9"><div class=CVariable><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.previewEnabled</td></tr></table></blockquote>Specifies if the panning should be previewed. </div></div><div class=CToolTip id="tt10"><div class=CVariable><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.useGrid</td></tr></table></blockquote>Specifies if the panning steps should be aligned to the grid size. </div></div><div class=CToolTip id="tt11"><div class=CVariable><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.panningEnabled</td></tr></table></blockquote>Specifies if panning should be enabled. </div></div><div class=CToolTip id="tt12"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.isPanningEnabled = function()</td></tr></table></blockquote>Returns panningEnabled.</div></div><div class=CToolTip id="tt13"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>mxPanningHandler.prototype.setPanningEnabled = function(</td><td class=PParameter nowrap>value</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote>Sets panningEnabled.</div></div><div class=CToolTip id="tt14"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td>mxPanningHandler.prototype.init = function()</td></tr></table></blockquote>Initializes the shapes required for this vertex handler.</div></div><div class=CToolTip id="tt15"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype prettyprint"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>mx
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