bool enabled = false; int i;
if (m_subType == 1)
{
for (i=0;i<=m_hookHelper.FocusMap.LayerCount - 1;i++)
{
if (m_hookHelper.ActiveView.FocusMap.get_Layer(i).Visible == false)
{
enabled = true;
break;
}
}
}
else
{
for (i=0;i<=m_hookHelper.FocusMap.LayerCount - 1;i++)
{
if (m_hookHelper.ActiveView.FocusMap.get_Layer(i).Visible == true)
{
enabled = true;
break;
}
}
}
return enabled;
}
}
} }
移除图层类RemoveLayer代码：
using ESRI.ArcGIS.ADF.BaseClasses; using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
namespace _sdnMap {
///
/// 删除图层
///
public sealed class RemoveLayer : BaseCommand
{
private IMapControl3 m_mapControl;
public RemoveLayer()
{
base.m_caption = \
}
public override void OnClick()
{
ILayer layer = (ILayer)m_mapControl.CustomProperty;
m_mapControl.Map.DeleteLayer(layer);
}
public override void OnCreate(object hook)
{
m_mapControl = (IMapControl3)hook;
}
} }
放大至整个图层类ZoomToLayer：
using ESRI.ArcGIS.ADF.BaseClasses; using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
namespace _sdnMap {
///
/// 放大至整个图层
///
public sealed class ZoomToLayer : BaseCommand
{
private IMapControl3 m_mapControl;
public ZoomToLayer()
{
base.m_caption = \
}
public override void OnClick()
{
ILayer layer = (ILayer)m_mapControl.CustomProperty;
m_mapControl.Extent = layer.AreaOfInterest;
}
public override void OnCreate(object hook)
{
m_mapControl = (IMapControl3)hook;
}
} }
以上三个工具或命令的实现代码比较简单，在此不过多的分析，请读者自行理解。
下面在Form1_Load函数中进行菜单项的添加，代码如下：
//添加自定义菜单项到TOCCOntrol的Map菜单中 //打开文档菜单
m_menuMap.AddItem(new OpenNewMapDocument(m_controlsSynchronizer), esriCommandStyles.esriCommandStyleIconAndText);
//添加数据菜单
m_menuMap.AddItem(new ControlsAddDataCommandClass(), -1,
-1, 1, 0, false,
false,
esriCommandStyles.esriCommandStyleIconAndText);
//打开全部图层菜单
m_menuMap.AddItem(new LayerVisibility(), 1, 2, false, esriCommandStyles.esriCommandStyleTextOnly);
//关闭全部图层菜单
m_menuMap.AddItem(new LayerVisibility(), 2, 3, false, esriCommandStyles.esriCommandStyleTextOnly);
//以二级菜单的形式添加内置的“选择”菜单
m_menuMap.AddSubMenu(\
//以二级菜单的形式添加内置的“地图浏览”菜单
m_menuMap.AddSubMenu(\
//添加自定义菜单项到TOCCOntrol的图层菜单中
m_menuLayer = new ToolbarMenuClass();
//添加“移除图层”菜单项
m_menuLayer.AddItem(new RemoveLayer(), -1, 0, false, esriCommandStyles.esriCommandStyleTextOnly);
//添加“放大到整个图层”菜单项
m_menuLayer.AddItem(new ZoomToLayer(), -1, 1, true, esriCommandStyles.esriCommandStyleTextOnly);
//设置菜单的Hook
m_menuLayer.SetHook(m_mapControl);
m_menuMap.SetHook(m_mapControl); 3、
弹出右键菜单
顾名思义，右键菜单是在鼠标右键按下的时候弹出，所以我们要添加TOCControl1控件的OnMouseDown事件，实现代码如下：
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