# 多边形编辑类 EditPolygonItem 示例 ::: details 目录 [[toc]] ::: ## 绘制示例 ::: details 示例代码 <<< @/docs/.vuepress/components/edit/items/editpolygon/editpolygon.vue ::: ## 源代码 ::: details 查看代码 <<< @/docs/guides/edit/items/src/EditPolygonItem.ts ::: ## 代码说明 ### 1 当 EditPolygonItem 为编辑状态时,需要将 EditPolygonItem 赋给 grabItem ``` js {4} // 编辑状态时的 LineItem this.polygonItem = new EditPolygonItem(null); this.polygonItem.status = SItemStatus.Create; this.scene.grabItem = this.polygonItem; ``` ### 2 当 EditPolygonItem 为正常状态时,需要将 grabItem 置为 null ``` js {4} // 正常状态时的 LineItem this.polygonItem = new EditPolygonItem(null); this.polygonItem.status = SItemStatus.Normal; this.scene.grabItem = null; ``` ### 3 当 EditPolygonItem 为试图垂直水平绘制时需要修改 verAndLeve 属性 ``` js {3} // 编辑状态时的 LineItem this.polygonItem = new EditPolygonItem(null,); this.polygonItem.status = SItemStatus.Create; this.polygonItem.verAndLeve = true; this.scene.grabItem = this.polygonItem; ``` ### 4 当 EditPolygonItem 修改属性但是画板尚未变化时需要刷新 ``` js {4} // 编辑状态时的 LineItem this.polygonItem = new EditPolygonItem(null); this.polygonItem.status = SItemStatus.Create; this.view.update(); ``` ### 5 当 EditPolygonItem 需要拖动时设置 moveable = true ``` js {4} // 编辑状态时的 LineItem this.polygonItem = new EditPolygonItem(null); this.polygonItem.status = SItemStatus.Create; this.polygonItem.moveable = true; ``` ### 6 当 EditPolygonItem 绘制完成后的回调函数为 finishCreated ``` js {4} // 编辑状态时的 LineItem this.polygonItem = new EditPolygonItem(null); this.polygonItem.status = SItemStatus.Create; this.polygonItem.connect("finishCreated", this, this.finishCreated); this.polygonItem.moveable = true; methods:{ finishCreated(){ } } ``` ## 交互要求 * 点击item 选中态时出现选择控制点(增加是否可操作控制点状态); * esc键:若大于等于三个顶点则为完成,否则为取消操作; * Ctrl+鼠标点入边线为增加点;Ctrl+鼠标点到顶点为选择多个点,删除顶点用delete键(若剩余顶点小于三个则不能删除); * 鼠标左键选择单点可移动; * 双击进入编辑态;自动闭合自行结束; * 编辑态 ctrl+左键选择多个点可拖动; * 绘制点时线与线不能交叉(放开鼠标左键后,如果出现交叉,则该点位回到原来位置,如果为创建状态,该点无法生成); * 选中某条边拖动;拖动中不可交叉;(补图,两种线得拖动方式) * 当拖动连接线的定点连接该item锚点时;接近item会显示锚点