Multiline can hold several lines in one top-level item. now, point, line, multiline, polygon, these geo types can hold WKT style geo elements in future.

2.sloved a geomarker graphics item click and dblclick mismatch. In old case, when mouse clicks, a dblclick message will be pumped.

2. individually update tableView instead of at one time.

try to partical slove ui deadlock in heavy items count , however, we need a abstract view in low level 0~3.

2. next , we will build command support for icon items

2. we will build other functions later

2. Add a pixmap geo graphics item, for future new features.

2. set 3 method, perpare for call_func.
Signed-off-by: goldenhawking <goldenhawking@163.com>

2. Add a Item clicked event, for  geomarker.

2.make a copy painting , sloved +180 -180 polygon drawing problem.

pen and brush now are  independent with shapes.