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<div class="section" id="viewbox">
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<h1>ViewBox<a class="headerlink" href="#viewbox" title="Permalink to this headline">¶</a></h1>
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<dl class="class">
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<dt id="pyqtgraph.ViewBox">
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<em class="property">class </em><tt class="descclassname">pyqtgraph.</tt><tt class="descname">ViewBox</tt><big>(</big><em>parent=None</em>, <em>border=None</em>, <em>lockAspect=False</em>, <em>enableMouse=True</em>, <em>invertY=False</em><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox" title="Permalink to this definition">¶</a></dt>
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<dd><p>Box that allows internal scaling/panning of children by mouse drag.
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Not really compatible with GraphicsView having the same functionality.</p>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.__init__">
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<tt class="descname">__init__</tt><big>(</big><em>parent=None</em>, <em>border=None</em>, <em>lockAspect=False</em>, <em>enableMouse=True</em>, <em>invertY=False</em><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.__init__" title="Permalink to this definition">¶</a></dt>
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<dd></dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.childTransform">
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<tt class="descname">childTransform</tt><big>(</big><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.childTransform" title="Permalink to this definition">¶</a></dt>
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<dd><p>Return the transform that maps from child(item in the childGroup) coordinates to local coordinates.
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(This maps from inside the viewbox to outside)</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.childrenBoundingRect">
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<tt class="descname">childrenBoundingRect</tt><big>(</big><em>item=None</em><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.childrenBoundingRect" title="Permalink to this definition">¶</a></dt>
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<dd><p>Return the bounding rect of all children. Returns None if there are no bounded children</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.itemBoundingRect">
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<tt class="descname">itemBoundingRect</tt><big>(</big><em>item</em><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.itemBoundingRect" title="Permalink to this definition">¶</a></dt>
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<dd><p>Return the bounding rect of the item in view coordinates</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.keyPressEvent">
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<tt class="descname">keyPressEvent</tt><big>(</big><em>ev</em><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.keyPressEvent" title="Permalink to this definition">¶</a></dt>
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<dd><p>This routine should capture key presses in the current view box.
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Key presses are used only when self.useLeftButtonPan is false
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The following events are implemented:
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ctrl-A : zooms out to the default “full” view of the plot
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ctrl-+ : moves forward in the zooming stack (if it exists)
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ctrl– : moves backward in the zooming stack (if it exists)</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.mapFromView">
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<tt class="descname">mapFromView</tt><big>(</big><em>obj</em><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.mapFromView" title="Permalink to this definition">¶</a></dt>
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<dd><p>Maps from the coordinate system displayed inside the ViewBox to the local coordinates of the ViewBox</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.mapSceneToView">
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<tt class="descname">mapSceneToView</tt><big>(</big><em>obj</em><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.mapSceneToView" title="Permalink to this definition">¶</a></dt>
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<dd><p>Maps from scene coordinates to the coordinate system displayed inside the ViewBox</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.mapToView">
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<tt class="descname">mapToView</tt><big>(</big><em>obj</em><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.mapToView" title="Permalink to this definition">¶</a></dt>
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<dd><p>Maps from the local coordinates of the ViewBox to the coordinate system displayed inside the ViewBox</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.mapViewToScene">
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<tt class="descname">mapViewToScene</tt><big>(</big><em>obj</em><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.mapViewToScene" title="Permalink to this definition">¶</a></dt>
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<dd><p>Maps from the coordinate system displayed inside the ViewBox to scene coordinates</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.scaleBy">
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<tt class="descname">scaleBy</tt><big>(</big><em>s</em>, <em>center=None</em><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.scaleBy" title="Permalink to this definition">¶</a></dt>
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<dd><p>Scale by s around given center point (or center of view)</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.setAspectLocked">
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<tt class="descname">setAspectLocked</tt><big>(</big><em>lock=True</em>, <em>ratio=1</em><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.setAspectLocked" title="Permalink to this definition">¶</a></dt>
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<dd><p>If the aspect ratio is locked, view scaling is always forced to be isotropic.
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By default, the ratio is set to 1; x and y both have the same scaling.
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This ratio can be overridden (width/height), or use None to lock in the current ratio.</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.setRange">
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<tt class="descname">setRange</tt><big>(</big><em>ax</em>, <em>minimum=None</em>, <em>maximum=None</em>, <em>padding=0.02</em>, <em>update=True</em><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.setRange" title="Permalink to this definition">¶</a></dt>
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<dd><p>Set the visible range of the ViewBox.
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Can be called with a QRectF:</p>
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<blockquote>
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setRange(QRectF(x, y, w, h))</blockquote>
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<dl class="docutils">
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<dt>Or with axis, min, max:</dt>
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<dd>setRange(0, xMin, xMax)
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setRange(1, yMin, yMax)</dd>
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</dl>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.targetRect">
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<tt class="descname">targetRect</tt><big>(</big><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.targetRect" title="Permalink to this definition">¶</a></dt>
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<dd><p>Return the region which has been requested to be visible.
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(this is not necessarily the same as the region that is <em>actually</em> visible)</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ViewBox.viewRect">
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<tt class="descname">viewRect</tt><big>(</big><big>)</big><a class="headerlink" href="#pyqtgraph.ViewBox.viewRect" title="Permalink to this definition">¶</a></dt>
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<dd><p>Return a QRectF bounding the region visible within the ViewBox</p>
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</dd></dl>
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</dd></dl>
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