/// <summary>
/// Finishes the label moving operation.
/// </summary>
private void MapMouseUp(IMuteMap map, MouseEventArgs e)
{
if (!Active || _currentLabel.LayerHandle == -1)
{
return;
}
if (e.X == _currentLabel.X || e.Y == _currentLabel.Y)
{
Clear();
return;
}
// check that new position is within map
if (e.X < 0 || e.Y < 0 || e.X > map.Width || e.Y > map.Height)
{
Clear();
return;
}
var fs = map.GetFeatureSet(_currentLabel.LayerHandle);
if (_currentLabel.IsChart)
{
var chart = fs.Diagrams[_currentLabel.LabelIndex];
if (chart != null)
{
double x1, x2, y1, y2;
map.PixelToProj(_currentLabel.X, _currentLabel.Y, out x1, out y1);
map.PixelToProj(e.X, e.Y, out x2, out y2);
chart.PositionX = chart.PositionX - x1 + x2;
chart.PositionY = chart.PositionY - y1 + y2;
fs.Diagrams.SavingMode = PersistenceType.XmlOverwrite; // .chart file should be overwritten
_context.Project.SetModified();
map.Redraw();
}
}
else
{
var lb = fs.Labels.Items[_currentLabel.LabelIndex, _currentLabel.PartIndex];
if (lb != null)
{
double x1, x2, y1, y2;
map.PixelToProj(_currentLabel.X, _currentLabel.Y, out x1, out y1);
map.PixelToProj(e.X, e.Y, out x2, out y2);
lb.X = lb.X - x1 + x2;
lb.Y = lb.Y - y1 + y2;
fs.Labels.SavingMode = PersistenceType.XmlOverwrite; // .lbl file should be overwritten
_context.Project.SetModified();
map.Redraw();
}
}
Clear();
}
/// <summary>
/// Start the dragging operation.
/// </summary>
private void MapMouseDown(IMuteMap map, MouseEventArgs e)
{
if (!Active)
{
return;
}
var data = FindMovableItem(e.X, e.Y);
if (data == null)
{
return;
}
_currentLabel = data;
var fs = _map.GetFeatureSet(_currentLabel.LayerHandle);
if (fs == null)
{
return;
}
IEnvelope env = null;
if (_currentLabel.IsChart)
{
var chart = fs.Diagrams[_currentLabel.LabelIndex];
env = chart.ScreenExtents;
}
else
{
var label = fs.Labels.Items[_currentLabel.LabelIndex, _currentLabel.PartIndex];
env = label.ScreenExtents;
}
_currentLabel.Rect = env.ToRectangle();
DrawLabelRectangle(_currentLabel.Rect);
}