最近在搭建主界面的过程中，为了界面美观大方，使用了Dot net bar。但是，在Dot net bar的状态栏中放置PIE SDK自带的比例尺控件，运行主界面程序后，比例尺控件始终不显示比例尺信息，得不到想要的效果。如果使用Windows Form自带的状态栏，则能够正常显示比例尺信息。我猜想，可能是PIE SDK自带的比例尺控件与Dot net bar不兼容。我参考了官方博客（https://www.cnblogs.com/PIESat/p/10272779.html），利用Dot net bar拓展实现了比例尺控件。
基于Dot net bar，利用PIE SDK自带的比例尺控件（代码如下），运行程序后的显示效果如下图（不能正常显示比例尺信息）：
1 public FormMain()
2 {
3 InitializeComponent();
4 mapControlMain.OnExtentUpdated += mapControlMain_OnExtentUpdated;//鹰眼图
5 ///比例尺控件
6 //Common.MapScaleCommandControl mapScaleControl = new Common.MapScaleCommandControl();
7 //mapScaleControl.Control = comboBoxItem_MapScale;
8 //mapScaleControl.OnCreate(mapControlMain);
9 MapScaleCommandControl mapScale = new MapScaleCommandControl();
10 mapScale.Control = comboBoxItem_MapScale;
11 mapScale.OnCreate(mapControlMain);
12 //进度条//首先隐藏需要时显现
13 this.progressBarItem.Visible = false;
14 Control.CheckForIllegalCrossThreadCalls = false;
15 }
利用基于Dot net bar拓展实现的比例尺控件（代码如下），运行程序后显示的效果如下图（可正常显示比例尺信息）：
1 public FormMain()
2 {
3 InitializeComponent();
4 mapControlMain.OnExtentUpdated += mapControlMain_OnExtentUpdated;//鹰眼图
5 ///比例尺控件
6 Common.MapScaleCommandControl mapScaleControl = new Common.MapScaleCommandControl();
7 mapScaleControl.Control = comboBoxItem_MapScale;
8 mapScaleControl.OnCreate(mapControlMain);
9 //MapScaleCommandControl mapScale = new MapScaleCommandControl();
10 //mapScale.Control = comboBoxItem_MapScale;
11 //mapScale.OnCreate(mapControlMain);
12 //进度条//首先隐藏需要时显现
13 this.progressBarItem.Visible = false;
14 Control.CheckForIllegalCrossThreadCalls = false;
15 }
利用Dot net bar拓展实现的比例尺控件代码如下：
1 /// <summary>
2 /// 比例尺控件
3 /// </summary>
4 #region
5 class MapScaleCommandControl : PIE.Controls.BaseCommandControl
6 {
7 #region 成员变量
8 /// <summary>
9 /// ToolStripComboBox
10 /// </summary>
11 private DevComponents.DotNetBar.ComboBoxItem m_DotNetBarComboxItem = null;
12 #endregion
13
14 /// <summary>
15 /// 构造函数
16 /// </summary>
17 public MapScaleCommandControl()
18 {
19 this.Caption = "";
20 this.Name = "";
21 this.Checked = false;
22 this.Enabled = false;
23 }
24 /// <summary>
25 /// Control
26 /// </summary>
27 public override object Control
28 {
29 get
30 {
31 return m_DotNetBarComboxItem;
32 }
33 set
34 {
35 m_DotNetBarComboxItem = value as DevComponents.DotNetBar.ComboBoxItem;
36 }
37 }
38 /// <summary>
39 /// 是否可用
40 /// </summary>
41 public override bool Enabled
42 {
43 get
44 {
45 if (m_Hook == null || m_HookHelper.ActiveView.FocusMap.LayerCount < 1) return false;
46 return true;
47 }
48 protected set
49 {
50 base.Enabled = value;
51 }
52 }
53 /// <summary>
54 /// 创建插件对象
55 /// </summary>
56 /// <param name="hook"></param>
57 public override void OnCreate(object hook)
58 {
59 if (hook == null) return;
60 if (!(hook is PIE.Carto.IPmdContents)) return;
61 this.Enabled = true;
62 m_Hook = hook;
63 m_HookHelper.Hook = hook;
64
65 if (m_DotNetBarComboxItem == null) return;
66 DevComponents.DotNetBar.ComboBoxItem comboxItem = this.m_DotNetBarComboxItem as DevComponents.DotNetBar.ComboBoxItem;
67 if (comboxItem == null) return;
68
69 comboxItem.Items.Add("1:500");
70 comboxItem.Items.Add("1:1000");
71 comboxItem.Items.Add("1:5000");
72 comboxItem.Items.Add("1:10000");
73 comboxItem.Items.Add("1:50000");
74 comboxItem.Items.Add("1:100000");
75 comboxItem.Items.Add("1:500000");
76 comboxItem.Items.Add("1:1000000");
77 //comboxItem.KeyPress += comboxItem_KeyPress;
78 comboxItem.SelectedIndexChanged += comboxItem_SelectedIndexChanged;
79 (hook as PIE.AxControls.MapControl).OnExtentUpdated += MapScaleCommandControl_OnExtentUpdated;
80 }
81 void comboxItem_SelectedIndexChanged(object sender, EventArgs e)
82 {
83 //获取选中的比例尺
84 string strScale = m_DotNetBarComboxItem.Text.ToString();
85 int count = strScale.Length;
86 if (count < 3) return;
87 string str = strScale.Substring(2, count - 2);
88 double scale = Convert.ToDouble(str);
89 if (scale < 1) return;
90
91 //改变地图的比例尺并更新
92 m_HookHelper.ActiveView.DisplayTransformation.MapScale = scale;
93 m_HookHelper.ActiveView.PartialRefresh(PIE.Carto.ViewDrawPhaseType.ViewAll);
94 }
95 private void MapScaleCommandControl_OnExtentUpdated(object sender, bool sizeChanged, PIE.Geometry.IEnvelope newEnvelope)
96 {
97 string strScale = m_HookHelper.ActiveView.DisplayTransformation.MapScale.ToString();
98 double scale = Convert.ToDouble(strScale);
99 strScale = "1:" + scale.ToString("0");
100 m_DotNetBarComboxItem.ComboBoxEx.Text = strScale;
101 this.m_DotNetBarComboxItem.Text = strScale;
102 }
103 /// <summary>
104 /// 比例尺文本变化事件
105 /// </summary>
106 /// <param name="sender"></param>
107 /// <param name="e"></param>
108 void comboxItem_TextChanged(object sender, EventArgs e)
109 {
110 //获取选中的比例尺
111 string strScale = m_DotNetBarComboxItem.Text.ToString();
112 int count = strScale.Length;
113 if (count < 3) return;
114 string str = strScale.Substring(2, count - 2);
115 double scale = Convert.ToDouble(str);
116 if (scale < 1) return;
117
118 //改变地图的比例尺并更新
119 m_HookHelper.ActiveView.DisplayTransformation.MapScale = scale;
120 m_HookHelper.ActiveView.PartialRefresh(PIE.Carto.ViewDrawPhaseType.ViewAll);
121 }
122 /// <summary>
123 /// 点击事件
124 /// </summary>
125 public override void OnClick()
126 {
127 base.OnClick();
128 }
129 }
130 #endregion
有不对的地方，请大家批评指正。
原文地址：https://www.cnblogs.com/LW-MA/p/11417552.html
时间： 2024-07-30 13:45:10