angular(^4)-监控表格按键行为的问题
之前开发的时候,用的是angular4,用ngGrid的时候要求对表格中的按键进行监控,具体如下:
1)上下左右,按方向移动位置(指编辑单元格);
2)enter,移动到下一个可编辑单元格;
3)一个数字输入框(cellEditorFramework)里双击空格键完成某个特定操作;
注:因为后续了解到更多的便捷方法,特此将以下说明更新;
解决办法:
1、光标移动
// 光标移动 skipNextCell = (params: any) => {
const previousCell = params.previousCellDef;
const suggestedNextCell = params.nextCellDef;
switch (params.key) {
case KEY_DOWN:
var nextRowIndex = previousCell.rowIndex - 1;
if (nextRowIndex < 0) {
return null;
} else {
return {
rowIndex: nextRowIndex,
column: previousCell.column,
floating: previousCell.floating
};
}
case KEY_UP:
var nextRowIndex = previousCell.rowIndex + 1;
var renderedRowCount = gridOptions.api.getModel().getRowCount();
if (nextRowIndex >= renderedRowCount) {
return null;
} else {
return {
rowIndex: nextRowIndex,
column: previousCell.column,
floating: previousCell.floating
};
}
case KEY_LEFT:
case KEY_RIGHT:
return suggestedNextCell;
default:
throw "this will never happen, navigation is always on of the 4 keys above";
}
}
针对以上方法可以自定义上下左右键的行为;
2、事件监听
@HostListener('keydown', ['$event']) onkeydown($event) { if (this.allowKeyboardEvent) { const focusedCell = this.detailListOptions.api.getFocusedCell(); if ($event.keyCode === Keycode.ENTER && this.detailListOptions.api && this.detailListOptions.api.getFocusedCell()) { // 把焦点移动到下一个可编辑单元格 this.focusNextEditableCell(); } else if (this.rowIndex > 0 && ($event.which === 190 || $event.which === 191) && focusedCell && focusedCell['column']['colId'] === 'remark') { if (this.timer > 1) { this.abstractKeyListen($event.which); } this.timer += 1; const that = this; setTimeout(function() { that.timer = 1; }, 300); } } }
hostListener可以用来设置快捷键;