pyg4ometry.gui.example1

Attributes

PyQtImpl

QVTKRWIBase

QVTKRWIBase

PyQtImpl

QVTKRWIBaseClass

_keysyms

Classes

QVTKRenderWindowInteractor

A QVTKRenderWindowInteractor for Python and Qt. Uses a

Functions

QVTKRenderWidgetConeExample()

A simple example that uses the QVTKRenderWindowInteractor class.

_qt_key_to_key_sym(key)

Convert a Qt key into a vtk keysym.

Module Contents

pyg4ometry.gui.example1.PyQtImpl
pyg4ometry.gui.example1.QVTKRWIBase = 'QWidget'
pyg4ometry.gui.example1.QVTKRWIBase
pyg4ometry.gui.example1.PyQtImpl = 'PyQt5'
pyg4ometry.gui.example1.QVTKRWIBaseClass
class pyg4ometry.gui.example1.QVTKRenderWindowInteractor(parent=None, **kw)

Bases: QVTKRWIBaseClass

A QVTKRenderWindowInteractor for Python and Qt. Uses a vtkGenericRenderWindowInteractor to handle the interactions. Use GetRenderWindow() to get the vtkRenderWindow. Create with the keyword stereo=1 in order to generate a stereo-capable window.

The user interface is summarized in vtkInteractorStyle.h:

  • Keypress j / Keypress t: toggle between joystick (position

sensitive) and trackball (motion sensitive) styles. In joystick style, motion occurs continuously as long as a mouse button is pressed. In trackball style, motion occurs when the mouse button is pressed and the mouse pointer moves.

  • Keypress c / Keypress o: toggle between camera and object

(actor) modes. In camera mode, mouse events affect the camera position and focal point. In object mode, mouse events affect the actor that is under the mouse pointer.

  • Button 1: rotate the camera around its focal point (if camera

mode) or rotate the actor around its origin (if actor mode). The rotation is in the direction defined from the center of the renderer’s viewport towards the mouse position. In joystick mode, the magnitude of the rotation is determined by the distance the mouse is from the center of the render window.

  • Button 2: pan the camera (if camera mode) or translate the actor

(if object mode). In joystick mode, the direction of pan or translation is from the center of the viewport towards the mouse position. In trackball mode, the direction of motion is the direction the mouse moves. (Note: with 2-button mice, pan is defined as <Shift>-Button 1.)

  • Button 3: zoom the camera (if camera mode) or scale the actor

(if object mode). Zoom in/increase scale if the mouse position is in the top half of the viewport; zoom out/decrease scale if the mouse position is in the bottom half. In joystick mode, the amount of zoom is controlled by the distance of the mouse pointer from the horizontal centerline of the window.

  • Keypress 3: toggle the render window into and out of stereo

mode. By default, red-blue stereo pairs are created. Some systems support Crystal Eyes LCD stereo glasses; you have to invoke SetStereoTypeToCrystalEyes() on the rendering window. Note: to use stereo you also need to pass a stereo=1 keyword argument to the constructor.

  • Keypress e: exit the application.

  • Keypress f: fly to the picked point

  • Keypress p: perform a pick operation. The render window interactor

has an internal instance of vtkCellPicker that it uses to pick.

  • Keypress r: reset the camera view along the current view

direction. Centers the actors and moves the camera so that all actors are visible.

  • Keypress s: modify the representation of all actors so that they

are surfaces.

  • Keypress u: invoke the user-defined function. Typically, this

keypress will bring up an interactor that you can type commands in.

  • Keypress w: modify the representation of all actors so that they

are wireframe.

_CURSOR_MAP
_ActiveButton
__saveX = 0
__saveY = 0
__saveModifiers
__saveButtons
__wheelDelta = 0
WId
_Timer
_hidden
__getattr__(attr)

Makes the object behave like a vtkGenericRenderWindowInteractor

Finalize()

Call internal cleanup method on VTK objects

CreateTimer(obj, evt)
DestroyTimer(obj, evt)
TimerEvent()
CursorChangedEvent(obj, evt)

Called when the CursorChangedEvent fires on the render window.

HideCursor()

Hides the cursor.

ShowCursor()

Shows the cursor.

closeEvent(evt)
sizeHint()
paintEngine()
paintEvent(ev)
resizeEvent(ev)
_GetCtrlShift(ev)
static _getPixelRatio()
_setEventInformation(x, y, ctrl, shift, key, repeat=0, keysum=None)
enterEvent(ev)
leaveEvent(ev)
mousePressEvent(ev)
mouseReleaseEvent(ev)
mouseMoveEvent(ev)
keyPressEvent(ev)
keyReleaseEvent(ev)
wheelEvent(ev)
GetRenderWindow()
Render()
pyg4ometry.gui.example1.QVTKRenderWidgetConeExample()

A simple example that uses the QVTKRenderWindowInteractor class.

pyg4ometry.gui.example1._keysyms
pyg4ometry.gui.example1._qt_key_to_key_sym(key)

Convert a Qt key into a vtk keysym.

This is essentially copied from the c++ implementation in GUISupport/Qt/QVTKInteractorAdapter.cxx.