Workspace

ui.workspace builds the structure of an editor-style window: title bar on top, docks on the left, right and bottom, the central area and the status bar.

Workspace

def view(self):
    return ui.workspace(
        pz.column([
            ui.tab_bar([ui.Tab.for_file("src/main.py")], "src/main.py", on_close=self.close),
            ui.editor("src/main.py", self.code, path="main.py"),
        ]),
        title_bar=ui.title_bar(
            [ui.title_button("pyzed", chevron=True),
             ui.title_button("main", icon="git-branch", muted=True)],
            [ui.icon_button("bell", self.notifications, size="sm"), ui.avatar("KV")],
        ),
        left=pz.column([
            ui.panel_header("Project", [ui.icon_button("plus", self.new, size="xs")]),
            ui.tree(self.nodes, expanded=self.expanded, selected="src/main.py"),
        ]) if self.show_left else None,
        bottom=pz.column([
            ui.panel_header("Terminal", icon="terminal"),
            ui.terminal("$ python main.py\n\x1b[32m✓\x1b[0m done"),
        ]) if self.show_bottom else None,
        status_bar=ui.status_bar(
            [ui.status_item("0", icon="circle-x"), ui.status_item("1", icon="triangle-alert")],
            [ui.status_item("Ln 4, Col 8"), ui.status_item("Python")],
        ),
        left_width=200,
        bottom_height=110,
    )

Docks

Pass None as left, right or bottom to hide a dock. That is how shortcuts like Ctrl+B are implemented (self.show_left = not self.show_left).
left_width, right_width and bottom_height set their size.
Inside a dock, ui.panel_header(title, actions, icon=...) acts as the header.
ui.panel(content, header=..., side=...) is useful if you build your own layout.

Title bar

ui.title_bar(
    start=[ui.title_button("my-project", self.projects, chevron=True)],
    end=[ui.icon_button("settings", self.settings, size="sm")],
    center=ui.muted("main.py"),
)

Status bar

ui.status_bar(
    [ui.status_item(icon="panel-left", on_press=self.toggle_left, selected=self.show_left,
                    tooltip="Project panel", keys="ctrl-b")],
    [ui.status_item(f"Ln {line}, Col {col}"), ui.status_item(pz.icons.language_for(self.active))],
)

Full reference: Workspace.