基于地图开发控件GMap.Net 使用 (五) 原创 用户自定义标签图片
最近看到 fangping朋友的提问问是否可以自定义标签，相信大家对此问题都挺关注。回头看看Gmap动态库还真没提供此功能。自己添加一个！打开开源源码创建一个类名为GMapMarkerImage的类。此类功能：用户可添加自定义图片标签。
添加源码如下：
View Code
public
class
GMapMarkerImage : GMapMarker
{
public
float
?
Bearing;
private
Image userImage
=
null
;
public
GMapMarkerImage(PointLatLng p)
:
base
(p)
{
Size
=
new
System.Drawing.Size(Resources.bigMarkerGreen.Width, Resources.bigMarkerGreen.Height);
Offset
=
new
Point(
-
10
,
-
34
);
}
public
GMapMarkerImage(PointLatLng p ,
string
imageFile)
:
base
(p)
{
Size
=
new
System.Drawing.Size(Resources.bigMarkerGreen.Width, Resources.bigMarkerGreen.Height);
Offset
=
new
Point(
-
10
,
-
34
);
try
{
userImage
=
Bitmap.FromFile(imageFile);
userImage
=
new
Bitmap(
0
,
0
);
}
catch
{
}
}
public
GMapMarkerImage(PointLatLng p, Image imageFile)
:
base
(p)
{
Size
=
new
System.Drawing.Size(Resources.bigMarkerGreen.Width, Resources.bigMarkerGreen.Height);
Offset
=
new
Point(
-
10
,
-
34
);
userImage
=
imageFile;
}
static
readonly
Point[] Arrow
=
new
Point[] {
new
Point(
-
7
,
7
),
new
Point(
0
,
-
22
),
new
Point(
7
,
7
),
new
Point(
0
,
2
) };
public
override
void
OnRender(Graphics g)
{
#if
!PocketPC
g.TranslateTransform(ToolTipPosition.X, ToolTipPosition.Y);
g.ResetTransform();
if
(
!
Bearing.HasValue)
{
g.DrawImageUnscaled(userImage, LocalPosition.X, LocalPosition.Y);
}
#else
DrawImageUnscaled(g, Resources.shadow50, LocalPosition.X, LocalPosition.Y);
DrawImageUnscaled(g, Resources.marker, LocalPosition.X, LocalPosition.Y);
#endif
base
.OnRender(g);
}
喜洋洋同学就到地图上面了