testPythonItem.py 4.27 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151
import sys
import vtk
from vtk.test import Testing


class CustomPythonItem(object):
    def __init__(self, polydata):
        self.polydata = polydata

    def Initialize(self, vtkSelf):
        return True

    def Paint(self, vtkSelf, context2D):
        context2D.DrawPolyData(0.0,
                               0.0,
                               self.polydata,
                               self.polydata.GetCellData().GetScalars(),
                               vtk.VTK_SCALAR_MODE_USE_CELL_DATA)

        pen = context2D.GetPen()

        penColor = [0, 0, 0]
        pen.GetColor(penColor)
        penWidth = pen.GetWidth()

        brush = context2D.GetBrush()
        brushColor = [0, 0, 0, 0]
        brush.GetColor(brushColor)

        pen.SetColor([0, 0, 255])
        brush.SetColor([0, 0, 255])
        context2D.DrawWedge(0.75, 0.25, 0.125, 0.005, 30.0, 60.0)

        pen.SetWidth(20.0)
        pen.SetColor([0, 0, 0])
        brush.SetColor([0, 0, 0])
        context2D.DrawMarkers(vtk.vtkMarkerUtilities.CIRCLE, False, [0.1, 0.1, 0.5, 0.5, 0.9, 0.9], 3)
        pen.SetWidth(1.0)

        textProp = vtk.vtkTextProperty()
        textProp.BoldOn()
        textProp.ItalicOn()
        textProp.SetFontSize(22)
        textProp.SetColor(0.5, 0.0, 1.0)
        textProp.SetOrientation(45)
        context2D.ApplyTextProp(textProp)
        context2D.DrawString(0.35, 0.4, b"Context2D!")

        pen.SetColor([200, 200, 30])
        brush.SetColor([200, 200, 30])
        brush.SetOpacity(128)
        context2D.DrawPolygon([0.5, 0.5, 0.75, 0.0, 1.0, 0.5], 3)

        pen.SetColor([133, 70, 70])
        brush.SetColor([133, 70, 70])
        brush.SetOpacity(255)
        context2D.DrawArc(0.25, 0.75, 0.125, 0.0, 360.0)

        pen.SetWidth(penWidth)
        pen.SetColor(penColor)
        brush.SetColor(brushColor[:3])
        brush.SetOpacity(brushColor[3])

        return True


def buildPolyData():
    pd = vtk.vtkPolyData()

    pts = vtk.vtkPoints()
    pts.InsertNextPoint([0.1, 0.1, 0.0])
    pts.InsertNextPoint([0.9, 0.9, 0.0])

    pd.SetPoints(pts)

    lines = vtk.vtkCellArray()
    lines.InsertNextCell(2)
    lines.InsertCellPoint(0)
    lines.InsertCellPoint(1)

    pd.SetLines(lines)

    colors = vtk.vtkUnsignedCharArray()
    colors.SetNumberOfComponents(4)
    colors.InsertNextTypedTuple([27, 128, 89, 255])

    pd.GetCellData().SetScalars(colors)

    return pd


class TestPythonItem(Testing.vtkTest):
    def testPythonItem(self):
        width = 400
        height = 400

        view = vtk.vtkContextView()
        renWin = view.GetRenderWindow()
        renWin.SetSize(width, height)

        area = vtk.vtkInteractiveArea()
        view.GetScene().AddItem(area)

        drawAreaBounds = vtk.vtkRectd(0.0, 0.0, 1.0, 1.0)

        vp = [0.05, 0.95, 0.05, 0.95]
        screenGeometry = vtk.vtkRecti(int(vp[0] * width),
                                      int(vp[2] * height),
                                      int((vp[1] - vp[0]) * width),
                                      int((vp[3] - vp[2]) * height))

        item = vtk.vtkPythonItem()
        item.SetPythonObject(CustomPythonItem(buildPolyData()))
        item.SetVisible(True)
        area.GetDrawAreaItem().AddItem(item)

        area.SetDrawAreaBounds(drawAreaBounds)
        area.SetGeometry(screenGeometry)
        area.SetFillViewport(False)
        area.SetShowGrid(False)

        axisLeft = area.GetAxis(vtk.vtkAxis.LEFT)
        axisRight = area.GetAxis(vtk.vtkAxis.RIGHT)
        axisBottom = area.GetAxis(vtk.vtkAxis.BOTTOM)
        axisTop = area.GetAxis(vtk.vtkAxis.TOP)
        axisTop.SetVisible(False)
        axisRight.SetVisible(False)
        axisLeft.SetVisible(False)
        axisBottom.SetVisible(False)
        axisTop.SetMargins(0, 0)
        axisRight.SetMargins(0, 0)
        axisLeft.SetMargins(0, 0)
        axisBottom.SetMargins(0, 0)

        renWin.Render()

        # Create a vtkTesting object
        rtTester = vtk.vtkTesting()
        rtTester.SetRenderWindow(renWin)

        for arg in sys.argv[1:]:
            rtTester.AddArgument(arg)

        # Perform the image comparison test and print out the result.
        result = rtTester.RegressionTest(0.0)

        if result == 0:
            raise Exception("TestPythonItem failed.")

if __name__ == "__main__":
    Testing.main([(TestPythonItem, 'test')])