mirror of
https://github.com/1j01/textual-paint.git
synced 2024-12-21 13:51:45 +03:00
114 lines
4.1 KiB
Python
114 lines
4.1 KiB
Python
from textual import events
|
|
from textual.message import Message
|
|
from textual.app import ComposeResult
|
|
from textual.containers import Container
|
|
from textual.geometry import Offset, Region, Size
|
|
from textual.reactive import var, reactive
|
|
from textual.widgets import Button, Static
|
|
|
|
class WindowTitleBar(Container):
|
|
"""A title bar widget."""
|
|
|
|
title = var([])
|
|
|
|
def __init__(self, title: str = "", **kwargs) -> None:
|
|
"""Initialize a title bar."""
|
|
super().__init__(**kwargs)
|
|
self.add_class("window_title_bar")
|
|
self.title = title
|
|
|
|
def compose(self) -> ComposeResult:
|
|
"""Add our widgets."""
|
|
yield Static(self.title, classes="window_title")
|
|
yield Button("🗙", classes="window_close")
|
|
# yield Button("🗕", classes="window_minimize")
|
|
# yield Button("🗖", classes="window_maximize")
|
|
# 🗗 for restore
|
|
|
|
class Window(Container):
|
|
"""A draggable window widget."""
|
|
|
|
class CloseRequest(Message):
|
|
"""Message when the user clicks the close button. Can be prevented."""
|
|
|
|
def __init__(self, **kwargs) -> None:
|
|
"""Initialize a close request."""
|
|
super().__init__(**kwargs)
|
|
self.prevent_close = False
|
|
|
|
class Closed(Message):
|
|
"""Message when the window is really closed."""
|
|
|
|
title = var([])
|
|
|
|
def __init__(self, *children, title: str = "", **kwargs) -> None:
|
|
"""Initialize a window."""
|
|
super().__init__(*children, **kwargs)
|
|
self.add_class("window")
|
|
self.mouse_at_drag_start = None
|
|
self.offset_at_drag_start = None
|
|
self.title_bar = WindowTitleBar(title=title)
|
|
self.content = Container(classes="window_content")
|
|
# must be after title_bar is defined
|
|
self.title = title
|
|
|
|
def on_mount(self) -> None:
|
|
"""Called when the widget is mounted."""
|
|
self.mount(self.title_bar)
|
|
self.mount(self.content)
|
|
|
|
# def compose(self) -> ComposeResult:
|
|
# """Add our widgets."""
|
|
# self.title_bar = yield WindowTitleBar(title=self.title)
|
|
# self.content = yield Container(classes="window_content")
|
|
|
|
# def compose_add_child(self, widget):
|
|
# """When using the context manager compose syntax, we want to attach nodes to the content container."""
|
|
# self.content.mount(widget)
|
|
|
|
def watch_title(self, old_title, new_title: str) -> None:
|
|
"""Called when title is changed."""
|
|
self.title_bar.title = new_title
|
|
|
|
def on_button_pressed(self, event: Button.Pressed) -> None:
|
|
"""Called when a button is clicked or activated with the keyboard."""
|
|
|
|
if event.button.has_class("window_close"):
|
|
close_request = self.CloseRequest()
|
|
self.post_message(close_request)
|
|
if not close_request.prevent_close:
|
|
self.close()
|
|
|
|
def on_mouse_down(self, event: events.MouseDown) -> None:
|
|
"""Called when the user presses the mouse button."""
|
|
# TODO: detect if the mouse is over the title bar,
|
|
# and not window content or title bar buttons,
|
|
# then re-enable dragging.
|
|
# May need to add on_mouse_down to a container
|
|
# around the title, and send a message to the window.
|
|
return
|
|
|
|
if event.button != 1:
|
|
return
|
|
self.mouse_at_drag_start = event.screen_offset
|
|
self.offset_at_drag_start = Offset(self.styles.offset.x.value, self.styles.offset.y.value)
|
|
self.capture_mouse()
|
|
|
|
def on_mouse_move(self, event: events.MouseMove) -> None:
|
|
"""Called when the user moves the mouse."""
|
|
if self.mouse_at_drag_start:
|
|
self.styles.offset = (
|
|
self.offset_at_drag_start.x + event.screen_x - self.mouse_at_drag_start.x,
|
|
self.offset_at_drag_start.y + event.screen_y - self.mouse_at_drag_start.y,
|
|
)
|
|
|
|
def on_mouse_up(self, event: events.MouseUp) -> None:
|
|
"""Called when the user releases the mouse button."""
|
|
self.mouse_at_drag_start = None
|
|
self.offset_at_drag_start = None
|
|
self.release_mouse()
|
|
|
|
def close(self) -> None:
|
|
self.remove()
|
|
self.post_message(self.Closed())
|