private void Window_MouseUp(object sender, MouseButtonEventArgs e)
{
if (e.ChangedButton == MouseButton.Left)
{
bool wasDragSelectionApplied = false;
ChartingManager.SetFinalPoint(e.GetPosition(this));
if (ChartingManager.GetIsDragging())
{
//
// Drag selection has ended, apply the 'selection rectangle'.
//
ChartingManager.SetIsDragging(false);
e.Handled = true;
wasDragSelectionApplied = true;
ReportMousePosition(sender);
}
if (ChartingManager.GetIsLeftMouseButtonDownOnWindow())
{
ChartingManager.SetIsLeftMouseButtonDownOnWindow(false);
// this.ReleaseMouseCapture();
e.Handled = true;
}
if (!wasDragSelectionApplied)
{
//
// A click and release in empty space clears the selection.
//
listBox.SelectedItems.Clear();
}
}
}
/// <summary>
/// Update the position and size of the rectangle used for drag selection.
/// </summary>
private void UpdateDragSelectionRect(Point pt1, Point pt2, object sender)
{
double x, y, width, height;
var b = sender as Grid;
Canvas c = b.Children[0] as Canvas;
Border dragSelectionBorder = c.Children[1] as Border;
ChartingManager.UpdateDragSelectionRect(pt1, pt2, out x, out y, out width, out height);
Canvas.SetLeft(dragSelectionBorder, x);
Canvas.SetTop(dragSelectionBorder, y);
dragSelectionBorder.Width = width;
dragSelectionBorder.Height = height;
}
public void Window_MouseDown(object sender, MouseButtonEventArgs e)
{
if (e.ChangedButton == MouseButton.Left)
{
UpdateDragSelectionRect(ChartingManager.GetCurrent(), e.GetPosition(this), sender);
var b = sender as Grid;
//
// Clear selection immediately when starting drag selection.
//
listBox.SelectedItems.Clear();
CartesianChart c = b.Children[1] as CartesianChart;
ChartingManager.Mouse_Down(true, e.GetPosition(this), c.ActualWidth);
e.Handled = true;
}
}
public void ReportMousePosition(object sender)
{
Point p = Mouse.GetPosition(null);
Point origMouseDownPoint = ChartingManager.GetCurrent();
var b = sender as Grid;
CartesianChart chart = b.Children[1] as CartesianChart;
int axisBegin;
int axisEnd;
List <IEnumerable <ChartPoint> > selected = ChartingManager.SelectedPoints(chart, p, out axisBegin, out axisEnd);
if (axisBegin != -1 && axisEnd != -1)
{
var vm = DataContext as ChartGridViewModel;
vm.LoadSelectedPoints.Execute(selected);
}
}
private void Window_MouseMove(object sender, MouseEventArgs e)
{
if (ChartingManager.GetIsDragging())
{
//
// Drag selection is in progress.
//
Point curMouseDownPoint = e.GetPosition(this);
curMouseDownPoint.Y = 0;
UpdateDragSelectionRect(ChartingManager.GetCurrent(), curMouseDownPoint, sender);
e.Handled = true;
}
else if (ChartingManager.GetIsLeftMouseButtonDownOnWindow())
{
//
// The user is left-dragging the mouse,
// but don't initiate drag selection until
// they have dragged past the threshold value.
//
Point curMouseDownPoint = e.GetPosition(this);
var dragDelta = ChartingManager.CalculateDelta(curMouseDownPoint);
double dragDistance = Math.Abs(dragDelta.Length);
if (dragDistance > 2)
{
//
// When the mouse has been dragged more than the threshold value commence drag selection.
//
ChartingManager.SetIsDragging(true);
InitDragSelectionRect(ChartingManager.GetCurrent(), curMouseDownPoint, sender);
}
e.Handled = true;
}
}
