yumoqing
1291f7fee3
When valueField/textField are not explicitly set in opts, the auto-select logic (line 1140) and nullable empty-option creation (lines 1144-1145) used data[0][undefined] which returned undefined, causing: - Single-option selects to show blank (auto-select failed) - nullable empty options to have undefined keys Now extracts vf/tf local variables with ||'value'/||'text' fallback at the top of build_options(), used consistently throughout.
14 lines
508 B
Markdown
14 lines
508 B
Markdown
# KeyPress
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控件功能：监听键盘按键事件，当用户按下任意键时，清除当前内容并显示按下的键名。
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类型：容器控件
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父类控件：VBox
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## 初始化参数
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- 无特殊初始化参数，继承自 `bricks.VBox` 的通用参数（如布局相关选项等）。
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## 主要事件
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- `keydown`：绑定全局键盘按下事件，触发 `key_handler` 方法处理按键逻辑。
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在该事件中获取 `event.key` 值，并动态创建显示按键信息的文本控件。 |