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249 | class FluMenuBar(Frame, DObject, FluGradient):
def __init__(self, *args, mode="light", height=40, **kwargs):
self._init(mode)
#: 记下配置高度，菜单项据此算出自身高度（见 _item_height）
self._configured_height = height
super().__init__(*args, height=height, **kwargs)
self._draw(None)
self.bind("<Configure>", self._event_configure, add="+")
def _item_height(self) -> int:
"""菜单项按钮的高度。
历史实现沿用 ``FluButton`` 的默认高度 32，再配 ``pady=5``，
合计需要 42px；而菜单栏默认只有 40px，底部还有一条 1.2px 的分隔线。
结果按钮被垂直压扁，文字跟着变形。
这里按菜单栏的实际高度，留出上下各 4px 与分隔线的余量。
"""
total = getattr(self, "_configured_height", 40) or 40
try:
total = int(self.cget("height")) or total
except Exception:
pass
return max(18, int(total) - 10)
def _item_width(self, label: str, width=None) -> int:
"""菜单项的宽度。
``len(label) * 8`` 对中文会严重偏窄（"文件" 只算出 16 像素），
改用 :func:`~tkflu.defs.measure_label_width` 做真实度量。
"""
if width is not None:
return width
from .defs import measure_label_width
return measure_label_width(self, label)
def _init(self, mode):
from easydict import EasyDict
self.attributes = EasyDict(
{"back_color": "#f3f3f3", "border_color": "#e5e5e5", "actions": {}}
)
self.theme(mode=mode)
def show(self):
self.pack(fill="x")
def add_command(self, custom_widget=None, width=None, label: str = "", **kwargs):
width = self._item_width(label, width)
if custom_widget:
widget = custom_widget(self)
else:
from .button import FluButton
widget = FluButton(self, width=width, height=self._item_height())
if "style" in kwargs:
style = kwargs.pop("style")
else:
style = "menu"
if "command" in kwargs:
command = kwargs.pop("command")
else:
def empty():
pass
command = empty
if "id" in kwargs:
id = kwargs.pop("id")
else:
id = widget._w
if hasattr(widget, "dconfigure"):
widget.dconfigure(text=label, command=command)
else:
if hasattr(widget, "configure"):
widget.configure(text=label, command=command)
if hasattr(widget, "theme"):
widget.theme(style=style)
widget.pack(side="left", padx=4, pady=4)
self.dcget("actions")[id] = widget
from .menu import FluMenu
def add_cascade(
self,
custom_widget=None,
width=None,
label: str = "",
menu: FluMenu = None,
**kwargs,
):
width = self._item_width(label, width)
if custom_widget:
widget = custom_widget(self)
else:
from .button import FluButton
widget = FluButton(self, width=width, height=self._item_height())
if "style" in kwargs:
style = kwargs.pop("style")
else:
style = "menu"
if "id" in kwargs:
id = kwargs.pop("id")
else:
id = widget._w
def command():
menu.focus_set()
menu.popup(
widget.winfo_rootx() - 5, widget.winfo_rooty() + widget.winfo_height()
)
# 弹窗尺寸按内容算，不再写死 100px 宽（中文菜单项会被截断）
menu_width, menu_height = menu.preferred_size()
menu.window.geometry(f"{menu_width}x{menu_height}")
menu.window.deiconify()
menu.window.attributes("-topmost")
if hasattr(widget, "dconfigure"):
widget.dconfigure(text=label, command=command)
else:
if hasattr(widget, "configure"):
widget.configure(text=label, command=command)
if hasattr(widget, "theme"):
widget.theme(style=style)
widget.pack(side="left", padx=4, pady=4)
self.dcget("actions")[id] = widget
def action(self, id):
return self.dcget("actions")[id]
def update_children(self):
"""把菜单项按钮重新换一次肤（历史 API）。
保留名字是为了兼容老代码；内部走统一过渡，因此不再逐个 ``update()``。
"""
for widget in self.dcget("actions").values():
if hasattr(widget, "theme"):
widget.theme(mode=self.mode)
def theme(self, mode="light"):
"""菜单栏（连同菜单项按钮）切到 ``mode``。
旧实现是"自己换 + 遍历按钮 + 每个按钮 ``update()``"：那会让每个按钮
各排各的过渡帧，还会在遍历途中把别人的帧提前执行掉，于是菜单项
一个一个变色。现在整棵子树交给统一过渡：一条时间轴，同步插值。
"""
from .theme_transition import applying_themes, run_theme_transition
if applying_themes():
# 有人（FluThemeManager）正在统一驱动：只改自己的配色，
# 菜单项按钮由驱动方负责，别在这里另起一条时间轴。
self.theme_myself(mode=mode)
return
run_theme_transition(self, mode)
def theme_myself(
self, mode="light", animation_steps: int = None, animation_step_time: int = None
):
if animation_steps is None:
from .designs.animation import get_animation_steps
animation_steps = get_animation_steps()
if animation_step_time is None:
from .designs.animation import get_animation_step_time
animation_step_time = get_animation_step_time()
from .designs.menubar import menubar
m = menubar(mode)
self.mode = mode
if hasattr(self, "tk"):
if not animation_steps == 0 or not animation_step_time == 0:
if mode.lower() == "dark":
back_colors = self.generate_hex2hex(
self.attributes.back_color,
m["back_color"],
steps=animation_steps,
)
border_colors = self.generate_hex2hex(
self.attributes.border_color,
m["border_color"],
steps=animation_steps,
)
else:
back_colors = self.generate_hex2hex(
self.attributes.back_color,
m["back_color"],
steps=animation_steps,
)
border_colors = self.generate_hex2hex(
self.attributes.border_color,
m["border_color"],
steps=animation_steps,
)
for i in range(animation_steps):
def update(ii=i): # 使用默认参数立即捕获i的值
self.dconfigure(
back_color=back_colors[ii], border_color=border_colors[ii]
)
self._draw()
self.after(
i * animation_step_time, update
) # 直接传递函数，不需要lambda
self.after(
animation_steps * animation_step_time + 50,
lambda: self.update_children(),
)
else:
self.dconfigure(back_color=m["back_color"])
self.dconfigure(border_color=m["border_color"])
self._draw()
def _draw(self, event=None):
self.config(background=self.attributes.back_color)
if not hasattr(self, "border"):
self.border = Frame(
self, height=1.2, background=self.attributes.border_color
)
else:
self.border.configure(background=self.attributes.border_color)
self.border.pack(fill="x", expand="yes", side="bottom")
def _event_configure(self, event=None):
self._draw(event)
|