ArcEngine地图漫游的实现

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ArcEngine地图漫游的实现

2008-03-24 23:15

#region 地图漫游工具栏代码

        //缩小2倍
        private void ZoomInfxdButton_Click(object sender, EventArgs e)
        {
            IActiveView actView = axMapControl1.ActiveView;
            IPoint centerPoint = new PointClass();
            centerPoint.PutCoords((actView.Extent.XMin + actView.Extent.XMax) / 2, (actView.Extent.YMax + actView.Extent.YMin) / 2);

IEnvelope envlope = actView.Extent;
envlope.Expand(1.5, 1.5, true);

            actView.Extent.CenterAt(centerPoint);
            actView.Extent = envlope;
            actView.Refresh();
        }

        //放大2倍
        private void ZoomOutfxdButton_Click(object sender, EventArgs e)
        {
            IActiveView actView = axMapControl1.ActiveView;
            IPoint centerPoint = new PointClass();
            centerPoint.PutCoords((actView.Extent.XMin + actView.Extent.XMax) / 2, (actView.Extent.YMax + actView.Extent.YMin) / 2);

IEnvelope envlope = actView.Extent;
envlope.Expand(0.5, 0.5, true);

            actView.Extent.CenterAt(centerPoint);
            actView.Extent = envlope;
            actView.Refresh();
        }

        //拉框放大
        private void ZoomInButton_Click(object sender, EventArgs e)
        {
            strMouseOperate = "ZoomIn";
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerZoomIn;
        }

        //拉框缩小
        private void ZoomOutButton_Click(object sender, EventArgs e)
        {
            strMouseOperate = "ZoomOut";
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerZoomOut;
        }

        //全图工具
        private void FullExtentButton_Click(object sender, EventArgs e)
        {
            axMapControl1.Extent = axMapControl1.FullExtent;
        }

        //移动工具
        private void PanButton_Click(object sender, EventArgs e)
        {
            strMouseOperate = "Pan";
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerPan;
        }

#endregion

private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
        {
            if(e.button==1)
            {
                IActiveView actView = axMapControl1.ActiveView; //(IActiveView)axMapControl1.Map;
                IEnvelope pEnv = new EnvelopeClass();

                switch (strMouseOperate)
                {
                    case "ZoomIn":
                        pEnv = axMapControl1.TrackRectangle();
                        actView.Extent = pEnv;
                        actView.Refresh();
                        break;

                    case "ZoomOut":
                        pEnv = axMapControl1.TrackRectangle();
                        IPoint pt = new PointClass();
                        pt.X = (actView.Extent.XMax + actView.Extent.XMin)/2;//(pEnv.XMin + pEnv.XMax) / 2;
                        pt.Y = (actView.Extent.YMax + actView.Extent.YMin)/2;//(pEnv.XMin + pEnv.YMax) / 2;
                        pEnv.Width = actView.Extent.Width * (actView.Extent.Width / pEnv.Width);
                        pEnv.Height = actView.Extent.Height * (actView.Extent.Height / pEnv.Height);
                        pEnv.CenterAt(pt);
                        actView.Extent = pEnv;
                        actView.Refresh();
                        break;

                    case "Pan":
                         axMapControl1.Pan();
                        break;
                    default:
                        break;
                }
             else if (e.button == 2)
            {
                strMouseOperate = "";
                axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
            }
     }