Gauge Manipulation: Draw, Drag, Plot, Group
Draw
Draw gives a graphical representation of a gauge. Drawing is done with the current pen in the device context associated with the desired window. Depending on the operation, handles may be displayed.
Drag
An operator can drag a gauge interactively over an image. Several dragging handles are available.
| ● | HitTest determines when the mouse cursor is over a handle. When it is, the cursor shape should be changed for feedback, and a drag can take place. |
| ● | Drag moves the handle and the corresponding gauge accordingly. |
In addition, if you are interacting with a polygon gauge, you can:
| ● | Use the method EPolygonGauge.AddVertexAtDisplayPosition (derived from EPolygonShape.AddVertexAtDisplayPosition) to create a new vertex at a chosen position (typically at a mouse click) |
| ● | Use the method EPolygonGauge.RemoveVertexAtDisplayPosition (derived from EPolygonShape.RemoveVertexAtDisplayPosition) to remove a vertex. |
Plot
EasyGauge can Plot gray-level values along the sampled paths and/or its derivative - useful for parameter tuning.
| ● | Point measurement gauges can plot after calling Measure. |
| ● | Model fitting gauges can plot after calling MeasureSample with an index argument that lies between 0 and GetNumSamples-1 (included). |
| ● | To view the corresponding sampling path, use the method Draw with mode EDrawingMode_SampledPath. |
Group
Measurement gauges can be grouped (their relative placement remains fixed) to form a dedicated tool that can be moved (translated and rotated) to follow the movement of inspected items / probes before computing measurements.
| ● | Attach associates a gauge to a mother gauge or EFrameShape object. |
| ● | NumDaughters, GetDaughter, or Mother retrieves information relative to attached daughters or mother. |
| ● | Detach, DetachDaughters dissociates the gauge or daughters from the mother. |
