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178 | class FluLabel(DDrawWidget, FluToolTipBase, FluGradient, TracedAfter):
def __init__(
self, *args, text="", width=None, height=32, font=None, mode="light", **kwargs
):
self._init(mode)
#: 调用方显式指定的宽度；None 表示"按文本自适应"
self._fixed_width = width
super().__init__(*args, width=self._initial_width(args, kwargs, text, width),
height=height, **kwargs)
self.dconfigure(
text=text,
)
from .defs import set_default_font
set_default_font(font, self.attributes, master=self)
# ------------------------------------------------------------------
def _initial_width(self, args, kwargs, text, width):
"""创建画布前先算出一个合理的初始宽度。"""
if width is not None:
return width
if not text:
return _EMPTY_WIDTH
from .defs import measure_label_width
return max(24, measure_label_width(_resolve_master(args, kwargs), text,
padding=_TEXT_PADDING))
def _init(self, mode):
from easydict import EasyDict
self.attributes = EasyDict(
{
"text": "",
"command": None,
"font": None,
"text_color": "#1b1b1b",
}
)
self.theme(mode=mode)
def _fit_to_text(self):
"""文本比画布宽时把画布加宽（只增不减，避免反复触发重排）。
只在调用方**没有**显式指定宽度时生效。
"""
if self._fixed_width is not None:
return
if not getattr(self, "element_text", None):
return
try:
bbox = self.bbox(self.element_text)
except Exception:
return
if not bbox:
return # 尚未映射，量不到
needed = int(bbox[2] - bbox[0]) + _TEXT_PADDING
current = self.winfo_reqwidth()
if needed > current:
self.config(width=needed)
def _draw(self, event=None, tempcolor=None):
super()._draw(event)
if tempcolor:
_text_color = tempcolor
else:
_text_color = self.attributes.text_color
if not hasattr(self, "element_text"):
self.element_text = self.create_text(
self.winfo_width() / 2,
self.winfo_height() / 2,
anchor="center",
fill=_text_color,
text=self.attributes.text,
font=self.attributes.font,
)
else:
self.coords(
self.element_text, self.winfo_width() / 2, self.winfo_height() / 2
)
self.itemconfigure(
self.element_text,
fill=_text_color,
text=self.attributes.text,
font=self.attributes.font,
)
self._fit_to_text()
def theme(
self, mode="light", animation_steps: int = None, animation_step_time: int = None
):
from .designs.label import label
self.mode = mode
m = label(mode)
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()
if not animation_steps == 0 or not animation_step_time == 0:
if hasattr(self, "tk"):
if self.attributes.text_color != m["text_color"]:
# 撤销上一轮没跑完的帧，避免迟到的旧颜色盖掉这次的结果
self.cancel_traced()
text_colors = self.generate_hex2hex(
self.attributes.text_color,
m["text_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._draw(tempcolor=text_colors[ii])
self.after_traced(i * animation_step_time, update)
# 最后一帧是中间色，补一次权威重绘回到目标颜色
self.after_traced(
animation_steps * animation_step_time + 10,
lambda: self._draw(),
)
self.dconfigure(text_color=m["text_color"])
if hasattr(self, "tk"):
self._draw()
|