Examples

Each script in examples/ is small and runnable. Most are self-checking: they drive their building block headlessly with window.simulate and window.advance and assert what should happen before opening a window for a few seconds. Run one with python examples/<name>.py.

Script	Shows
showcase.py	A settings window combining the widgets below: switches, a slider, a text field, a sorted list, a menu, and a dialog
switch.py	A complete widget from two boxes — the Building a Widget walkthrough
slider.py	Pointer capture, arrow keys, and assistive-technology actions in one widget
ripple.py	A press ripple: a clipped, scaling round box that destroys itself when done
reorder.py	A keyed list reordered with insert_child, keeping identity, focus, and animations
layout.py	An app frame from flex rows, a growing content area, and an absolute badge
grid.py	A form whose labels and fields line up in grid columns, over a gallery whose cells wrap to fit
animation.py	Linear and bezier easing, retargeting mid-flight, and chained on_complete
pan_zoom.py	The transform parts animating independently
shadows.py	Layered shadows easing between elevation levels
show_damage.py	What partial redraw repaints each frame, tinted; --watch keeps the window open for checking on a real desktop
hidpi.py	dpi_scaling: a card laid out in logical pixels and drawn sharp at the display's scale; --watch keeps the window open to drag between monitors
snapshot.py	window.snapshot() and tre.write_png: a window's pixels at 1x and 2x, with no display
svg_document.py	An svg node painting a document with gradients, a clip, dashes and group opacity, at two aspect ratios
gradients.py	Gradient.linear, .radial and .sweep fills, one animating between two gradients
effects.py	blur, backdrop_blur (frosted glass, animating) and blend_mode over a striped background
languages.py	set_system_fonts: Latin, CJK, Hebrew, Indic, Thai and colour emoji in one window
rich_text.py	spans (colour, weight, italic, underline, strikethrough) and selectable text
touch.py	tap, long_press, pan and pinch, driven by simulated fingers (or real ones with --watch)
file_drop.py	file_hover, file_hover_cancel and file_drop for a drop zone (simulated, or real files with --watch)
accessibility_preferences.py	get("reduced_motion"), get("high_contrast") and their events: snap instead of ease, swap to a high-contrast palette
frame_stats.py	window.frame_stats(): stage times, redraw kind, fps and percentiles for a window that animates
transparent_window.py	transparent=True: a rounded, undecorated card on the desktop, with a close button
spring.py	easing=("spring", bounce): overshoot, and a retarget that keeps its speed
sticky_headers.py	sticky=0: section headers that hold the top of a scroll view
custom_cursor.py	tre.CursorImage: a reticle cursor drawn in Python, on a card
path_morph.py	One path morphing into another
canvas.py	A chart drawn with a Painter, with a precise hit test
node_graph.py	Absolutely placed nodes over a canvas of edges, selected by click, zoomed by transform
text_field.py	A text input in a box that outlines on focus; input and change
clipboard.py	Copy, cut, paste, and select-all in a text input
layers.py	An anchored menu and a modal dialog
scrollable_list.py, variable_height_list.py	Virtual lists with fixed and per-row heights
scroll_keys.py	A scroll view driven by keys and focus, with the scroll event
docking.py	Docked panels dragged between zones
two_windows.py	One App driving two windows
custom_titlebar.py	An undecorated window drawing its own title bar: a drag region, minimize/maximize/close, a resize border, and room for macOS's traffic lights; --watch keeps it open, --menu adds the OS's window menu
shader_shine.py	Shining text: an effect shader over a text node, driven by frame.time (WGSL in shaders/shine.wgsl)
shader_panel.py	A fractal behind a panel: an animated fill shader painting a rounded box, with ordinary children on top (shaders/julia.wgsl)
threadsafe_reload.py	A background file watcher reloading settings inside App.run()