VDF常见问题整理(三十八):如何插入折线的预定义形状?
VectorDraw Developer Framework(VDF)是一个用于应用程序可视化的图形引擎库。有了VDF提供的功能,您可以轻松地创建、编辑、管理、输出、输入和打印2D和3D图形文件。
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问:
用户如何在不使用预定义块的情况下将预定义的折线形状放置在布局中的某处?
答:
示例:
我们首先使用scriptCommand.rect制作一个矩形(或一条线,一条折线等),然后在rect的回调中调用actionentityadded,它调用了scriptCommand.select,所以现在矩形已经被选中,在select的回调中我们调用moveCallback,所以现在我们可以移动矩形并将其放置在所需位置。
在scriptCommand.move的回调中,我们调用sclaleCallback,该脚本运行scriptCommand.scale()或scriptCommand.rotate()。缩放或旋转逗号的回调,调用函数actionfinish,在其中更新布局,重新绘制画布,然后将SetActionLineColor(null)恢复为默认值。
function redo() { vdcanvas.scriptCommand.redo(); setTimeout(vdcanvas.redraw); } function undo() { vdcanvas.scriptCommand.undo(); setTimeout(vdcanvas.redraw); } function polyline() { //we start the undogroup vdcanvas.scriptCommand.undogroup('begin'); //create a rect for example with InsertionPoint too far in order not to be draw on screen vdcanvas.scriptCommand.rect([[2000, 2000, 0], 3.0, 4.0,0], actionentityadded); } function actionentityadded(vdrawobj, entity) { vdrawobj.SetActionLineColor([0, 0, 0, 0]);//set the action line color invisible vdrawobj.scriptCommand.select([entity], movecallback);//update script select with user entity and call the move command } function movecallback(vdrawobj) { var rect = vdcanvas.scriptCommand.ActiveSelection()[0]; vdcanvas.scriptCommand.move(rect.InsertionPoint, null, sclaleCallback);//call move action with reference the InsertionPoint of rect } function sclaleCallback(vdrawobj) { var rect = vdcanvas.scriptCommand.ActiveSelection()[0]; if (!vdrawobj.ActiveAction().IsCanceled()) { //vdrawobj.scriptCommand.scale(rect.InsertionPoint, null, actionfinish); //call scale or rotate action with reference the InsertionPoint of rect vdcanvas.scriptCommand.rotate(rect.InsertionPoint,null,actionfinish); } else {//user press esc or right-click so the command is canceled actionfinish(vdrawobj); } } function actionfinish(vdrawobj) { var rect = vdrawobj.scriptCommand.ActiveSelection()[0]; if (vdrawobj.ActiveAction().IsCanceled()) {//in case action is canceled by the user esc or right click rect.Deleted = true;//mark the create figure as deleted vdrawobj.UpdateLayout(); //mark the layout bounds to be updated setTimeout(vdrawobj.redraw);//post a redraw in order to clear existing entity draw by the active action } vdrawobj.SetActionLineColor(null);//restore action line color to default value. vdcanvas.scriptCommand.undogroup('close');//Close the undogroup }
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