# Display and Graphical Manipulation ## Drawing [`EBaseGauge::Draw`](../../../doxygen_cpp/classeVision_1_1EBaseGauge.html#aa8af0a9d89d6dbe0fcd676102f8876e0) [_.NET](../../../doxygen_cs/classeVision_1_1EBaseGauge.html#a238794f6aaf4c6af7759ed8549e8380a) [_Python](../../../doxygen_python/classeVision_1_1EBaseGauge.html#a50c184a719e5c05380fa1ab57b54a157) gives a graphical representation of the gauge. Use the enumerate [`EDrawingMode`](../../../doxygen_cpp/namespaceeVision.html#a46a5eff0a429fb8f7157564a9c7e620c) [_.NET](../../../doxygen_cs/namespaceeVision.html#a22d98bfe7b35ea321e8d60e62e838438) [_Python](../../../doxygen_python/classeVision_1_1EDrawingMode.html) to specify the parts of the gauge that you want to draw: - `EDrawingMode_Nominal` to draw the nominal shape, the gauge tolerances and the handles.  - `EDrawingMode_Actual` to draw the measured shape.  - `EDrawingMode_Tolerances` to draw the tolerances around the nominal shape and its handles. - `EDrawingMode_TransitionType` to draw the transition type of each edge of the shape.  - `EDrawingMode_SampledPaths` to draw the paths sampled along the nominal shape. - `EDrawingMode_SampledPoints` to draw the points measured along each path sampled along the nominal shape that were used to fit the shape.  - `EDrawingMode_InvalidSampledPoints` to draw the points measured along each path sampled along the nominal shape that were excluded from the shape fitting operation (outliers).  - `EDrawingMode_PointsInSkipRange` to draw the points in the skip ranges for the gauges that support skip ranges. ## Graphical Manipulations * Use [`EBaseGauge::GetAvailableEditionModes`](../../../doxygen_cpp/classeVision_1_1EBaseGauge.html#af0f7fc38e18ac177b387e1b454ed7eca) [_.NET](../../../doxygen_cs/classeVision_1_1EBaseGauge.html#a7ef109c887dc001fbb29abf468f64cc2) [_Python](../../../doxygen_python/classeVision_1_1EBaseGauge.html#a34667e9e030a713c7a854c9873985694) to get the available graphical edition mode. - It returns the edition modes of the underlying nominal shape and [`EEditionMode_Tolerances`](../../../doxygen_cpp/namespaceeVision.html#a7640350ea6abaa1b8568b578bfbd6222) [_.NET](../../../doxygen_cs/namespaceeVision.html#a50693d260f38bf5e424f036c09ad4a6d) [_Python](../../../doxygen_python/classeVision_1_1EEditionMode.html) if the gauge has tolerances. * Use [`EBaseGauge::SetEditionMode`](../../../doxygen_cpp/classeVision_1_1EBaseGauge.html#a276ae543b5e097a1c1c47d82bdc80970) [_.NET](../../../doxygen_cs/classeVision_1_1EBaseGauge.html#a21b9f2a46ad89240ef3da58d25d9cb8a) [_Python](../../../doxygen_python/classeVision_1_1EBaseGauge.html#a5e4de41757586ad987cf3dae5400dbe5) to set the edition modes that you want to activate. * Use [`EBaseGauge::HitTest`](../../../doxygen_cpp/classeVision_1_1EBaseGauge.html#a72d87e6c8188b33d14b73048d717f9a9) [_.NET](../../../doxygen_cs/classeVision_1_1EBaseGauge.html#a47d6d14123c93c3d1fd89a19e1ec5f50) [_Python](../../../doxygen_python/classeVision_1_1EBaseGauge.html#afbf57a187990c99768220a8225f54eb1) to determine when the mouse cursor is over a handle and get the corresponding edition mode that you can use to change the shape of the mouse. * Use [`EBaseGauge::Drag`](../../../doxygen_cpp/classeVision_1_1EBaseGauge.html#aac134c1925ed13422e37c16150cf8044) [_.NET](../../../doxygen_cs/classeVision_1_1EBaseGauge.html#a3ae09dec3a529e76719aa09e18b6bc71) [_Python](../../../doxygen_python/classeVision_1_1EBaseGauge.html#aba4e2c2c2aa63f049a56c0e6afd723f4) to move the handle and the corresponding gauge accordingly.  #### NOTE With the API, you can perform graphical manipulation on the *nominal* shape and on the tolerances of the gauge. However, in **eVision Studio**, only the tolerances can be manipulated in the gauge tools. ## Plot **EasyGauge** can plot gray-level values along the sample paths and/or its derivative. This is useful to tune the parameters. * Use [`EBaseGauge::MeasureSamplePath`](../../../doxygen_cpp/classeVision_1_1EBaseGauge.html#a675cb0d501015c87e0ec28479055bd31) [_.NET](../../../doxygen_cs/classeVision_1_1EBaseGauge.html#af77230f583f0520bdcca677b1790417a) [_Python](../../../doxygen_python/classeVision_1_1EBaseGauge.html#a19ff9fce228507c08a3f311b933f017e) to get the measured sample path for one of the sample paths of the gauge. - Use [`ESamplePath::Plot`](../../../doxygen_cpp/classeVision_1_1ESamplePath.html#a5f0df3c24f415d0e03b60ea470d5fa3e) [_.NET](../../../doxygen_cs/classeVision_1_1ESamplePath.html#a565250bc0606785f67511654ff30dbb3) [_Python](../../../doxygen_python/classeVision_1_1ESamplePath.html#a5ac5626792dc7280318b73409c4178df) to plot the profile and/or the derivative.  - Use [`ESamplePath::DrawPath`](../../../doxygen_cpp/classeVision_1_1ESamplePath.html#a85630325d6952309938389ba038deded) [_.NET](../../../doxygen_cs/classeVision_1_1ESamplePath.html#ac65877d702eec9e70f644ef534f124d1) [_Python](../../../doxygen_python/classeVision_1_1ESamplePath.html#a59b074fdfb741adeb450de31f02e0164) to draw the sample path that was measured.  ## Frame * When calling the drawing and graphical manipulations methods, pass the frame in which the shape is defined. * Also pass the same frame to [`EBaseGauge::Measure`](../../../doxygen_cpp/classeVision_1_1EBaseGauge.html#a09dbcb0c1bb7681ba31870c626fd0231) [_.NET](../../../doxygen_cs/classeVision_1_1EBaseGauge.html#a3fa25d60234bce338c219c93e591626f) [_Python](../../../doxygen_python/classeVision_1_1EBaseGauge.html#addcbfdee6ba540ab56d43c653a06e8e2). #### SEE ALSO Have a look at the [differences with the old legacy API](porting_from_legacy_gauge.html.md#easygauge-difference-legacy) of **EasyGauge** and how to port your application to the new API.