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251 | class XArrayViewer(Explorer):
"""Create a Trame GUI for a Pan3D XArray Viewer"""
def __init__(self, xarray=None, source=None, server=None, local_rendering=None):
"""Create an instance of the XArrayViewer class."""
super().__init__(xarray, source, server, local_rendering)
self.xarray = xarray
self._setup_vtk()
self._build_ui()
# -------------------------------------------------------------------------
# VTK Setup
# -------------------------------------------------------------------------
def _setup_vtk(self):
self.renderer = vtkRenderer(background=(0.8, 0.8, 0.8))
self.interactor = vtkRenderWindowInteractor()
self.render_window = vtkRenderWindow(off_screen_rendering=1)
self.render_window.AddRenderer(self.renderer)
self.interactor.SetRenderWindow(self.render_window)
self.interactor.GetInteractorStyle().SetCurrentStyleToTrackballCamera()
self.lut = vtkLookupTable()
self.source = vtkXArrayRectilinearSource(input=self.xarray)
# Need explicit geometry extraction when used with WASM
self.geometry = vtkDataSetSurfaceFilter(
input_connection=self.source.output_port
)
self.mapper = vtkPolyDataMapper(
input_connection=self.geometry.output_port,
lookup_table=self.lut,
)
self.actor = vtkActor(mapper=self.mapper, visibility=0)
self.interactor.Initialize()
axes_actor = vtkAxesActor()
self.widget = vtkOrientationMarkerWidget()
self.widget.SetOrientationMarker(axes_actor)
self.widget.SetInteractor(self.interactor)
self.widget.SetViewport(0.85, 0, 1, 0.15)
self.widget.EnabledOn()
self.widget.InteractiveOff()
# -------------------------------------------------------------------------
# UI
# -------------------------------------------------------------------------
def _build_ui(self, **kwargs):
self.state.trame__title = "XArray Viewer"
with VAppLayout(self.server, fill_height=True) as layout:
self.ui = layout
# 3D view
Pan3DView(
self.render_window,
local_rendering=self.local_rendering,
widgets=[self.widget],
)
# Scalar bar
Pan3DScalarBar(
v_show="!control_expended",
v_if="color_by",
img_src="preset_img",
)
# Save dialog
with v3.VDialog(v_model=("show_save_dialog", False)):
with v3.VCard(classes="mx-auto w-50"):
v3.VCardTitle("Save dataset to disk")
v3.VDivider()
with v3.VCardText():
v3.VTextField(
label="File path to save",
v_model=("save_dataset_path", ""),
hide_details=True,
)
with v3.VCardActions():
v3.VSpacer()
v3.VBtn(
"Save",
classes="text-none",
variant="flat",
color="primary",
click=(self.save_dataset, "[save_dataset_path]"),
)
v3.VBtn(
"Cancel",
classes="text-none",
variant="flat",
click="show_save_dialog=false",
)
# Error messages
v3.VAlert(
v_if=("data_origin_error", False),
border="start",
max_width=700,
rounded="lg",
text=("data_origin_error", ""),
title="Failed to load data",
type="error",
variant="tonal",
style="position:absolute;bottom:1rem;right:1rem;",
)
# Summary toolbar
SummaryToolbar(
v_show="!control_expended",
v_if="slice_t_max > 0",
)
# Control panel
with ControlPanel(
enable_data_selection=(self.xarray is None),
toggle="control_expended",
load_dataset=self.load_dataset,
import_file_upload=self.import_file_upload,
export_file_download=self.export_state,
xr_update_info="xr_update_info",
).ui_content:
self.ctrl.source_update_rendering_panel = RenderingSettings(
self.source,
self.update_rendering,
).update_from_source
# -----------------------------------------------------
# State change callbacks
# -----------------------------------------------------
@change("color_by")
def _on_color_by(self, color_by, **__):
if self.source.input is None:
return
ds = self.source()
if color_by in ds.point_data.keys():
array = ds.point_data[color_by]
min_value, max_value = array.GetRange()
self.state.color_min = min_value
self.state.color_max = max_value
self.mapper.SelectColorArray(color_by)
self.mapper.SetScalarModeToUsePointFieldData()
self.mapper.InterpolateScalarsBeforeMappingOn()
self.mapper.SetScalarVisibility(1)
else:
self.mapper.SetScalarVisibility(0)
self.state.color_min = 0
self.state.color_max = 1
@change("color_preset", "color_min", "color_max", "nan_color")
def _on_color_preset(
self, nan_color, nan_colors, color_preset, color_min, color_max, **_
):
color_min = float(color_min)
color_max = float(color_max)
self.mapper.SetScalarRange(color_min, color_max)
color = nan_colors[nan_color]
self.lut.SetNanColor(color)
set_preset(self.lut, color_preset)
self.state.preset_img = to_image(self.lut, 255)
self.ctrl.view_update()
@change("scale_x", "scale_y", "scale_z")
def _on_scale_change(self, scale_x, scale_y, scale_z, **_):
self.actor.SetScale(
to_float(scale_x),
to_float(scale_y),
to_float(scale_z),
)
if self.state.import_pending:
return
if self.actor.visibility:
self.renderer.ResetCamera()
if self.local_rendering:
self.ctrl.view_update(push_camera=True)
self.ctrl.view_reset_camera()
@change("data_origin_order")
def _on_order_change(self, **_):
if self.state.import_pending:
return
self.state.load_button_text = "Load"
self.state.can_load = True
# -----------------------------------------------------
# Triggers
# -----------------------------------------------------
def update_rendering(self, reset_camera=False):
self.state.dirty_data = False
if self.actor.visibility == 0:
self.actor.visibility = 1
self.renderer.AddActor(self.actor)
self.renderer.ResetCamera()
if self.ctrl.view_update_force.exists():
self.ctrl.view_update_force(push_camera=True)
if reset_camera:
self.ctrl.view_reset_camera()
else:
self.ctrl.view_update()
|