protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
// If we are dragging an element....
if (this.m_Multiselecting)
{
this.m_MultiselectPreviousEndX = this.m_MultiselectEndX;
this.m_MultiselectPreviousEndY = this.m_MultiselectEndY;
this.m_MultiselectEndX = e.X;
this.m_MultiselectEndY = e.Y;
var r = new Rectangle(
this.m_MultiselectStartX,
this.m_MultiselectStartY,
this.m_MultiselectPreviousEndX - this.m_MultiselectStartX,
this.m_MultiselectPreviousEndY - this.m_MultiselectStartY);
r.Inflate(r.Width > 0 ? 10 : -10, r.Height > 0 ? 10 : -10);
this.Invalidate(r.Fix());
}
else if (this.m_SelectedElementStillHeldDown && (this.m_SelectedElement != null || this.m_SelectedElements.Count > 1))
{
var toMove = this.m_SelectedElements;
if (this.m_SelectedElements.Count <= 1 && this.m_SelectedElement != null)
{
toMove = new ListOfFlowElements { this.m_SelectedElement };
}
foreach (var el in toMove)
{
this.Invalidate(el.InvalidatingRegion.Apply(this.Zoom).Fix());
foreach (Rectangle r in el.GetConnectorRegionsToInvalidate())
{
this.Invalidate(r.Apply(this.Zoom).Fix());
}
el.X = (int)(e.X / this.Zoom) - this.m_SelectedElementsDrag[el].X;
el.Y = (int)(e.Y / this.Zoom) - this.m_SelectedElementsDrag[el].Y;
this.Invalidate(el.InvalidatingRegion.Apply(this.Zoom));
foreach (Rectangle r in el.GetConnectorRegionsToInvalidate())
{
this.Invalidate(r.Apply(this.Zoom).Fix());
}
}
}
else if (this.m_PanningStillHeldDown)
{
this.Invalidate();
this.m_AllElementPanX = e.X;
this.m_AllElementPanY = e.Y;
foreach (FlowElement el in this.m_Elements)
{
el.X += (int)((this.m_AllElementPanX - this.m_AllElementPanOldX) / this.Zoom);
el.Y += (int)((this.m_AllElementPanY - this.m_AllElementPanOldY) / this.Zoom);
}
this.m_AllElementPanOldX = this.m_AllElementPanX;
this.m_AllElementPanOldY = this.m_AllElementPanY;
}
else if (this.m_ActiveConnection != null)
{
var r = new Rectangle(
this.m_ActiveConnection.Center.X,
this.m_ActiveConnection.Center.Y,
this.m_MouseActiveConnectionLocation.X - this.m_ActiveConnection.Center.X,
this.m_MouseActiveConnectionLocation.Y - this.m_ActiveConnection.Center.Y);
r.Inflate(r.Width > 0 ? 10 : -10, r.Height > 0 ? 10 : -10);
this.Invalidate(r.Fix());
r = new Rectangle(
this.m_ActiveConnection.Center.X,
this.m_ActiveConnection.Center.Y,
e.X - this.m_ActiveConnection.Center.X,
e.Y - this.m_ActiveConnection.Center.Y);
r.Inflate(r.Width > 0 ? 10 : -10, r.Height > 0 ? 10 : -10);
this.Invalidate(r.Fix());
}
this.m_MouseActiveConnectionLocation = new Point(
e.X,
e.Y
);
}
private void EndMultiselect()
{
this.m_Multiselecting = false;
this.m_WillMultiselect = false;
this.m_SelectedElements.Clear();
var r = new Rectangle(
this.m_MultiselectStartX,
this.m_MultiselectStartY,
this.m_MultiselectEndX - this.m_MultiselectStartX,
this.m_MultiselectEndY - this.m_MultiselectStartY);
r.Fix();
r = r.Apply(1 / this.Zoom);
foreach (FlowElement el in this.m_Elements.Reverse<FlowElement>())
{
if (r.IntersectsWith(el.Region))
{
this.m_SelectedElements.Add(el);
}
}
this.Invalidate();
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
e.Graphics.FillRectangle(SystemBrushes.ControlDark, e.ClipRectangle);
// Render each flow element.
var re = new RenderAttributes
{
Graphics = e.Graphics,
Zoom = this.Zoom,
Font = new Font(SystemFonts.DefaultFont.FontFamily, SystemFonts.DefaultFont.Size * this.Zoom)
};
foreach (FlowElement el in this.m_Elements)
FlowElement.RenderTo(el, re, this.m_SelectedElement == el || this.m_SelectedElements.Contains(el));
// Render the active connection line.
if (this.m_ActiveConnection != null)
{
e.Graphics.DrawLine(new Pen(Color.Red, 3),
this.m_ActiveConnection.Center,
this.m_MouseActiveConnectionLocation
);
}
if (this.m_Multiselecting)
{
var r = new Rectangle(
this.m_MultiselectStartX,
this.m_MultiselectStartY,
this.m_MultiselectEndX - this.m_MultiselectStartX,
this.m_MultiselectEndY - this.m_MultiselectStartY);
r.Fix();
e.Graphics.DrawRectangle(
new Pen(Color.Red, 3),
r
);
}
}
