1 using System; 2 using System.Collections.Generic; 3 using System.ComponentModel; 4 using System.Data; 5 using System.Drawing; 6 using System.Linq; 7 using System.Text; 8 using System.Windows.Forms; 9 using ESRI.ArcGIS.Geometry; 10 using ESRI.ArcGIS.Controls; 11 using System.Runtime.InteropServices; 12 using ESRI.ArcGIS.Display; 13 14 namespace WindowsFormsApplication2 15 { 16 public partial class Form1 : Form 17 { 18 public Form1() 19 { 20 InitializeComponent(); 21 } 22 23 24 double xmin, ymin, xmax, ymax; 25 double Xmin, Ymin, Xmax, Ymax; 26 int Xvalue = 0; 27 int Yvalue = 0; 28 int Xlarge = 0; 29 int Ylarge = 0; 30 double heightFullenv, h, widthFullEnv, w; 31 double initScale = 0d; 32 int vscrollMaxium = 0; 33 int hscrollMaxium = 0; 34 35 IEnvelope pEnvMap = null; 36 IMapControl2 pMapControl = null; 37 private void axMapControl1_OnExtentUpdated(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnExtentUpdatedEvent e) 38 { 39 pEnvMap = e.newEnvelope as IEnvelope; 40 pMapControl = axMapControl1.Object as IMapControl2; 41 if(initScale < 1) 42 initScale = pMapControl.MapScale; 43 44 xmin = pEnvMap.XMin; 45 ymin = pEnvMap.YMin; 46 xmax = pEnvMap.XMax; 47 ymax = pEnvMap.YMax; 48 w = pEnvMap.Width; 49 h = pEnvMap.Height; 50 lblLeftBottom.Text = Math.Round(pEnvMap.XMin,2).ToString() + "," + Math.Round(pEnvMap.YMin,2).ToString(); 51 lblRightTop.Text = Math.Round(pEnvMap.XMax, 2).ToString() + "," + Math.Round(pEnvMap.YMax, 2).ToString(); 52 lblw.Text = pEnvMap.Width.ToString(); 53 54 55 IEnvelope pEnvFull = pMapControl.ActiveView.FullExtent as IEnvelope; 56 Xmin = pEnvFull.XMin; 57 Ymin = pEnvFull.YMin; 58 Xmax = pEnvFull.XMax; 59 Ymax = pEnvFull.YMax; 60 widthFullEnv = pEnvFull.Width; 61 heightFullenv = pEnvFull.Height; 62 lblLeftBottomFull.Text = Math.Round(pEnvFull.XMin, 2).ToString() + "," + Math.Round(pEnvFull.YMin, 2).ToString(); 63 lblRightTopFull.Text = Math.Round(pEnvFull.XMax, 2).ToString() + "," + Math.Round(pEnvFull.YMax, 2).ToString(); 64 lblWf.Text = pEnvFull.Width.ToString(); 65 66 67 if (Ymax > ymax && ymin > Ymin) 68 { 69 vscrollMaxium = (int)(heightFullenv / 100); 70 Yvalue = (int)( (Ymax - ymax) / 100); 71 Ylarge = (int)(h / 100); 72 if (Yvalue + Ylarge > vscrollMaxium) 73 { 74 Yvalue = vscrollMaxium - Ylarge; 75 } 76 } 77 else if (ymax > Ymax) 78 { 79 vscrollMaxium = (int)((ymax - Ymin) / 100); 80 Yvalue = 0; 81 Ylarge = (int)(h / 100); 82 } 83 else if (Ymin > ymin) 84 { 85 vscrollMaxium = (int)((Ymax - ymin) / 100); 86 Ylarge = (int)(h / 100); 87 Yvalue = vscrollMaxium - Ylarge + 3; 88 } 89 this.vScrollBar1.Maximum = vscrollMaxium; 90 this.vScrollBar1.LargeChange = Ylarge; 91 this.vScrollBar1.Value = Yvalue; 92 this.vScrollBar1.SmallChange = (int)(4 * (initScale / pMapControl.MapScale)); 93 94 95 if (Xmax > xmax && xmin > Xmin) 96 { 97 hscrollMaxium = (int)(widthFullEnv / 100); 98 Xvalue = (int)((xmin - Xmin) / 100); 99 Xlarge = (int)(w / 100); 100 if (Xvalue + Xlarge > hscrollMaxium) 101 { 102 Xvalue = hscrollMaxium - Xlarge; 103 } 104 } 105 else if (xmax > Xmax) 106 { 107 hscrollMaxium = (int)((xmax - Xmin) / 100); 108 Xlarge = (int)(w / 100); 109 Xvalue = hscrollMaxium - Xlarge + 3; 110 } 111 else if (Xmin > xmin) 112 { 113 hscrollMaxium = (int)((Xmax - xmin) / 100); 114 Xvalue = 0; 115 Xlarge = (int)(w / 100); 116 } 117 this.hScrollBar1.Maximum = hscrollMaxium; 118 this.hScrollBar1.LargeChange = Xlarge; 119 this.hScrollBar1.Value = Xvalue; 120 this.hScrollBar1.SmallChange = (int)(4 * (initScale / pMapControl.MapScale)); 121 122 123 124 lblYscroll.Text = "Large:" + Ylarge.ToString() + ",Value:" + Yvalue.ToString() + 125 ",Small:" + vScrollBar1.SmallChange.ToString() + ",Max:" + vScrollBar1.Maximum.ToString(); 126 } 127 128 129 private void btnSetDemo_Click(object sender, EventArgs e) 130 { 131 int max = 0; 132 int value = 0; 133 int smallchange = 0; 134 int largechange = 0; 135 int.TryParse(this.txtSmallChange.Text, out smallchange); 136 int.TryParse(this.txtMaxinum.Text, out max); 137 int.TryParse(this.txtValue.Text, out value); 138 int.TryParse(txtLargeChange.Text, out largechange); 139 this.vScrollBar3.Maximum = max; 140 this.vScrollBar3.SmallChange = smallchange; 141 this.vScrollBar3.LargeChange = largechange; 142 this.vScrollBar3.Value = value; 143 } 144 145 private void vScrollBar1_Scroll(object sender, ScrollEventArgs e) 146 { 147 this.axMapControl1.OnExtentUpdated -= this.axMapControl1_OnExtentUpdated; 148 double newheight = (e.OldValue - e.NewValue) * 100; 149 pEnvMap.Offset(0, newheight); 150 this.pMapControl.Extent = pEnvMap; 151 this.axMapControl1.OnExtentUpdated += this.axMapControl1_OnExtentUpdated; 152 } 153 154 private void hScrollBar1_Scroll(object sender, ScrollEventArgs e) 155 { 156 this.axMapControl1.OnExtentUpdated -= this.axMapControl1_OnExtentUpdated; 157 double w = (e.NewValue - e.OldValue) * 100; 158 pEnvMap.Offset(w, 0); 159 this.pMapControl.Extent = pEnvMap; 160 this.axMapControl1.OnExtentUpdated += this.axMapControl1_OnExtentUpdated; 161 } 162 163 164 } 165 }
