public void MapButtonClick(object sender, EventArgs e)
{
GISMapActions action = GISMapActions.zoomin;
if ((Button)sender == button3)
{
action = GISMapActions.zoomin;
}
else if ((Button)sender == button4)
{
action = GISMapActions.zoomout;
}
else if ((Button)sender == button5)
{
action = GISMapActions.moveup;
}
else if ((Button)sender == button6)
{
action = GISMapActions.movedown;
}
else if ((Button)sender == button7)
{
action = GISMapActions.moveleft;
}
else if ((Button)sender == button8)
{
action = GISMapActions.moveright;
}
view.ChangeView(action);
UpdateMap();
}
double MovingFactor = 0.25; //移动因子
public void ChangeExtent(GISMapActions action)
{
double newminx = bottomleft.x, newminy = bottomleft.y,
newmaxx = upright.x, newmaxy = upright.y;
switch (action)
{
case GISMapActions.zoomin:
newminx = ((getMinX() + getMaxX()) - getWidth() / ZoomingFactor) / 2;
newminy = ((getMinY() + getMaxY()) - getHeight() / ZoomingFactor) / 2;
newmaxx = ((getMinX() + getMaxX()) + getWidth() / ZoomingFactor) / 2;
newmaxy = ((getMinY() + getMaxY()) + getHeight() / ZoomingFactor) / 2;
break;
case GISMapActions.zoomout:
newminx = ((getMinX() + getMaxX()) - getWidth() * ZoomingFactor) / 2;
newminy = ((getMinY() + getMaxY()) - getHeight() * ZoomingFactor) / 2;
newmaxx = ((getMinX() + getMaxX()) + getWidth() * ZoomingFactor) / 2;
newmaxy = ((getMinY() + getMaxY()) + getHeight() * ZoomingFactor) / 2;
break;
case GISMapActions.moveup:
newminy = getMinY() - getHeight() * MovingFactor;
newmaxy = getMaxY() - getHeight() * MovingFactor;
break;
case GISMapActions.movedown:
newminy = getMinY() + getHeight() * MovingFactor;
newmaxy = getMaxY() + getHeight() * MovingFactor;
break;
case GISMapActions.moveleft:
newminx = getMinX() + getWidth() * MovingFactor;
newmaxx = getMaxX() + getWidth() * MovingFactor;
break;
case GISMapActions.moveright:
newminx = getMinX() - getWidth() * MovingFactor;
newmaxx = getMaxX() - getWidth() * MovingFactor;
break;
}
upright.x = newmaxx;
upright.y = newmaxy;
bottomleft.x = newminx;
bottomleft.y = newminy;
}
public void ChangeView(GISMapActions action)
{
CurrentMapExtent.ChangeExtent(action);
Update(CurrentMapExtent, MapWindowsSize);
}