Google Maps API entry: Google Maps common events and Application Ideas 2

From: http://hi.baidu.com/xfm_zhr/blog/item/7bb88c19139de94242a9ad2b.html

Gmarker click, double-click, and drag effect

Note: The created gmarker cannot be dragged by default. You must activate this function in gmarkoptions when creating gmarker. Set draggable of gmarkeroptions to true, generally, the bouncy and bouncegravity attributes are set at the same time to change the drag-and-drop effect.

Double-click events. By default, double-clicking is performed by setting the double-clicking position to the map center. You can use gmap2.doubleclickzoomenabled () or other methods to block default operations.

ExampleCode:

Gmarker. Prototype. setindex = function (INDEX)

{

This. Index = index;

}

VaR markers = [];

//Generated by copying

VaR myicon = new gicon (g_default_icon, "http://www.google.com/mapfiles/marker.png ");

//Create a landmark

Function createmarker (point)

{

VaR marker = new gmarker (point, {icon: myicon, draggable: True, bouncy: true });

VaR Index = markers. length;

//Double-click a landmark to delete it.

Gevent. addlistener (Marker, 'dblclick', function ()

{

Deletemarker (Marker );

});

// DragstartEvent, new icon

Gevent. addlistener (Marker, 'dragstart', function ()

{

Marker. setimage ("http://www.google.com/mapfiles/dd-start.png ");

});

// DragendEvent, switch back to the original icon

Gevent. addlistener (Marker, 'dragend', function ()

{

Marker. setimage ("http://www.google.com/mapfiles/marker.png ");

});

//Click Show to form an arrangement

Gevent. addlistener (Marker, 'click', function ()

{

Marker. openinfowindowhtml ("What are you doing? ");

});

 

// DragEvent

//NOTE: If polyline is added, you need to re-draw the route when dragging the GEO chart.

Gevent. addlistener (Marker, 'drag', function ()

{

Redrawpolyline ();

});

Marker. setindex (INDEX );

Markers [Index] = marker;

Map. addoverlay (Marker );

//Each time a new landmark is created, it is re-painted.

Redrawpolyline ();

}

//Double-click a landmark to delete it.

Function deletemarker (Marker)

{

//Are you sure you want to delete it?

If (! Confirm ("Are you sure you want to delete this landmark? ") Return;

VaR Index = marker. index;

//Remove this layer

Map. removeoverlay (Marker );

//Delete the specified gmarker from the array and update the index.

For (VAR I = index; I <markers. Length-1; I ++)

{

Markers [I + 1]. setindex (I );

Markers [I] = markers [I + 1];

}

Markers. Length = markers. Length-1;

}

Function load ()

{

If (gbrowseriscompatible ())

{

Map = new gmap2 (document. getelementbyid ("map "));

Map. addcontrol (New gsmallmapcontrol ());

Map. addcontrol (New gmaptypecontrol ());

VaR centerpoint = new glatlng (39.92, 116.46 );

Map. setcenter (centerpoint, 4 );

Gevent. addlistener (MAP, 'click', function (overlay, point)

{

If (point) createmarker (point );

});

}

}

//Add route

Function addpolyline ()

{

//Create

VaR points = [];

For (VAR I = 0; I <markers. length; I ++)

{

Points [I] = markers [I]. getpoint ();

}

Polyline = new gpolyline (

Points, // glatlng ()Array

"# Ff0000 ",//Line color

10 ,//Line width

0.5 //Transparency

);

Map. addoverlay (polyline );

}

//Delete A route

Function removepolyline ()

{

Polyline. Remove ();

Polyline = NULL;

}

//Re-draw the route

Function redrawpolyline ()

{

If (polyline)

{

Removepolyline ();

}

Addpolyline ();

}