docs(vtklocal): add push camera example

jourdain · jourdain · commit 0c45443151b4 · 2025-07-30T18:43:32.000-06:00
diff --git a/examples/validation/issues/vtk-92.py b/examples/validation/issues/vtk-92.py
@@ -0,0 +1,59 @@
+import vtk
+
+from trame.app import TrameApp
+from trame.ui.vuetify3 import SinglePageLayout
+from trame.widgets import vuetify3, vtk as vtk_widgets
+
+
+class PushCamera(TrameApp):
+    def __init__(self, server=None):
+        super().__init__(server)
+        self._setup_vtk()
+        self._build_ui()
+
+    def _setup_vtk(self):
+        render_window = vtk.vtkRenderWindow()
+        render_window.SetOffScreenRendering(True)
+
+        renderer = vtk.vtkRenderer()
+        render_window.AddRenderer(renderer)
+
+        cone = vtk.vtkConeSource()
+        mapper = vtk.vtkPolyDataMapper()
+        actor = vtk.vtkActor()
+
+        mapper.SetInputConnection(cone.GetOutputPort())
+        actor.SetMapper(mapper)
+        renderer.AddActor(actor)
+        renderer.ResetCamera()
+
+        self.render_window = render_window
+        self.camera = renderer.GetActiveCamera()
+
+    def _build_ui(self):
+        with SinglePageLayout(self.server) as self.ui:
+            self.ui.title.set_text("Client-side Camera Control")
+
+            with self.ui.content:
+                with vuetify3.VContainer(
+                    fluid=True,
+                    classes="pa-0 fill-height",
+                ):
+                    vtk_widgets.VtkLocalView(self.render_window, ctx_name="view")
+
+            with self.ui.toolbar:
+                vuetify3.VSpacer()
+                vuetify3.VBtn("Set Top View", click=self.set_top_view)
+
+    def set_top_view(self):
+        self.camera.SetPosition(0, 5, 0)
+        self.camera.SetFocalPoint(0, 0, 0)
+        self.camera.SetViewUp(0, 0, -1)
+
+        self.ctx.view.push_camera()
+        # self.ctx.view.update()
+
+
+if __name__ == "__main__":
+    app = PushCamera()
+    app.server.start()
