void DoDragFigureMouseUp(DTkViewer dv, DMouseButton btn, DPoint pt)
{
if (btn == DMouseButton.Left)
{
// drag figure end event
if ((mouseHitTest == DHitTest.Body || mouseHitTest == DHitTest.SelectRect) &&
!currentFigure.Locked && DragFigureEnd != null)
DragFigureEnd(null, currentFigure, dv.EngineToClient(pt));
// nullify currentFigure
currentFigure = null;
// transition
TransitionTo(SelectDefault);
}
}
void DoSelectDefaultMouseUp(DTkViewer dv, DMouseButton btn, DPoint pt)
{
DHitTest hitTest;
List<Figure> children = new List<Figure>();
IGlyph glyph;
if (btn == DMouseButton.Left)
{
Figure f = figureHandler.HitTestFigures(pt, out hitTest, children, out glyph);
if (hitTest == DHitTest.Glyph)
{
if (children.Count > 0)
glyph.CallClicked(children[0], dv.EngineToClient(pt));
else
glyph.CallClicked(f, dv.EngineToClient(pt));
}
else if ((hitTest == DHitTest.Body || hitTest == DHitTest.SelectRect) && FigureClick != null)
{
foreach (Figure child in children)
if (child.ClickEvent)
FigureClick(null, child, dv.EngineToClient(pt));
if (f.ClickEvent)
FigureClick(null, f, dv.EngineToClient(pt));
if (FiguresDeselectOnSingleClick && !FigureSelectToggleToSelection)
{
figureHandler.SelectFigures(new List<Figure>(new Figure[] { f }), false);
dv.Update();
}
}
}
else if (btn == DMouseButton.Right)
{
Figure f = figureHandler.HitTestSelect(pt, out hitTest, null, out glyph, figureSelectToggleToSelection);
dv.SetCursor(DCursor.Default);
dv.Update();
if (ContextClick != null)
ContextClick(null, f, dv.EngineToClient(pt));
}
// nullify current figure for DoSelectDefault -> DHsmSignals.MouseMove:
currentFigure = null;
}
void DoDragFigureMouseMove(DTkViewer dv, DPoint pt)
{
// rectangular area to update with paint event
DRect updateRect = new DRect();
// move selected figures
switch (mouseHitTest)
{
case DHitTest.Body:
System.Diagnostics.Trace.Assert(currentFigure != null, "currentFigure is null");
// drag figure event
if (DragFigureEvt != null)
DragFigureEvt(null, currentFigure, dv.EngineToClient(pt));
// if figure drag op is cancelled then quit this function
if (cancelledFigureDrag)
{
cancelledFigureDrag = false;
return;
}
// bound pt to canvas
BoundPtToPage(pt);
// initial update rect
updateRect = GetBoundingBox(currentFigure);
foreach (Figure f in figureHandler.SelectedFigures)
updateRect = updateRect.Union(GetBoundingBox(f));
// apply x/y delta to figures
DPoint dPos = CalcDragDelta(pt);
if (gridSnapPosition && grid > 0)
{
DPoint o = GridSnapOffset(currentFigure.X + dPos.X, currentFigure.Y + dPos.Y);
dPos.X += o.X;
dPos.Y += o.Y;
pt.X += o.X;
pt.Y += o.Y;
}
if (dPos.X != 0 || dPos.Y != 0)
foreach (Figure f in figureHandler.SelectedFigures)
if (!f.Locked)
{
f.X += dPos.X;
f.Y += dPos.Y;
}
// store drag pt for reference later (eg. next mousemove event)
dragPt = pt;
// final update rect
foreach (Figure f in figureHandler.SelectedFigures)
updateRect = updateRect.Union(GetBoundingBox(f));
break;
case DHitTest.SelectRect:
goto case DHitTest.Body;
case DHitTest.Resize:
System.Diagnostics.Trace.Assert(currentFigure != null, "currentFigure is null");
// bound pt to canvas
BoundPtToPage(pt);
// alert figure we are going to resize it
currentFigure.BeforeResize();
// inital update rect
updateRect = GetBoundingBox(currentFigure);
// translate point onto the same rotated plane as the figure
pt = currentFigure.RotatePointToFigure(pt);
// apply width/height delta to figure
DPoint dSize = CalcSizeDelta(pt, currentFigure, LockingAspectRatio || currentFigure.LockAspectRatio);
if (lockInitialAspectRatio && !(figureLockAspectRatioMode == DHsmLockAspectRatioMode.Always || currentFigure.LockAspectRatio))
{
DPoint dSizeUnlocked = CalcSizeDelta(pt, currentFigure, false);
if (figureLockAspectRatioMode == DHsmLockAspectRatioMode.Never ||
Math.Abs(dSizeUnlocked.X - dSize.X) >= unlockInitalAspectRatioThreshold ||
Math.Abs(dSizeUnlocked.Y - dSize.Y) >= unlockInitalAspectRatioThreshold)
{
lockInitialAspectRatio = false;
dSize = dSizeUnlocked;
}
}
if (currentFigure.Width > 0 && currentFigure.Width + dSize.X < currentFigure.MinSize)
{
dSize.X = currentFigure.MinSize - currentFigure.Width;
if (LockingAspectRatio || currentFigure.LockAspectRatio)
dSize.Y = (currentFigure.Height / currentFigure.Width) * dSize.X;
}
if (currentFigure.Height > 0 && currentFigure.Height + dSize.Y < currentFigure.MinSize)
{
dSize.Y = currentFigure.MinSize - currentFigure.Height;
if (LockingAspectRatio || currentFigure.LockAspectRatio)
dSize.X = (currentFigure.Width / currentFigure.Height) * dSize.Y;
}
DRect oldRect = currentFigure.Rect;
currentFigure.Width += dSize.X;
currentFigure.Height += dSize.Y;
// snap resize
if (gridSnapResize && grid > 0)
{
DPoint o2 = GridSnapOffset(currentFigure.Width, currentFigure.Height);
currentFigure.Width += o2.X;
currentFigure.Height += o2.Y;
}
DGeom.UpdateRotationPosition(currentFigure, oldRect, currentFigure.Rect);
// final update rect
updateRect = updateRect.Union(GetBoundingBox(currentFigure));
// alert figure we have finished resizing
currentFigure.AfterResize();
// debug message
#if DEBUG
DoDebugMessage(string.Format("{0} {1}", dSize.X, dSize.Y));
#endif
break;
case DHitTest.RepositionPoint:
System.Diagnostics.Trace.Assert(currentFigure != null, "currentFigure is null");
// bound pt to canvas
BoundPtToPage(pt);
// inital update rect
updateRect = GetBoundingBox(currentFigure);
// get our reposition point interface
IRepositionPoint rp = (IRepositionPoint)currentFigure;
// setup points
DPoint newPoint;
newPoint = new DPoint(pt.X, pt.Y);
SetPointDelegate setPoint = delegate(DPoint point)
{
// snap point to grid
if (gridSnapLines && grid > 0)
{
DPoint o3 = GridSnapOffset(point.X, point.Y);
point.X += o3.X;
point.Y += o3.Y;
}
// now set point
rp.RepositionPoint = point;
};
GetRotationalSnapDelegate getRotationalSnap = delegate(double angleRemainder)
{
if (angleRemainder < figureSnapRange)
return -angleRemainder;
else if (angleRemainder > figureSnapAngle - figureSnapRange)
return figureSnapAngle - angleRemainder;
else
return 0;
};
if (rp.AnglePoint != null)
{
// find the current angle of the line and the remainder when divided by the snap angle
double currentAngle = DGeom.AngleBetweenPoints(rp.RepositionPoint, rp.AnglePoint);
double ar = currentAngle % figureSnapAngle;
// reposition line
double newAngle;
switch (FigureSnapAngleMode)
{
case DHsmSnapAngleMode.Always:
// slide point along snap angle
newAngle = DGeom.AngleBetweenPoints(newPoint, rp.AnglePoint);
ar = newAngle % figureSnapAngle;
if (ar < figureSnapAngle / 2)
setPoint(DGeom.RotatePoint(newPoint, rp.AnglePoint, -ar));
else
setPoint(DGeom.RotatePoint(newPoint, rp.AnglePoint, figureSnapAngle - ar));
break;
case DHsmSnapAngleMode.Default:
if (ar == 0)
{
// line is snapped, test if new angle will unsnap the line
newAngle = DGeom.AngleBetweenPoints(newPoint, rp.AnglePoint);
ar = newAngle % figureSnapAngle;
if (ar > figureSnapRange && ar < figureSnapAngle - figureSnapRange)
// unsnapped, set new point
setPoint(newPoint);
else
{
// slide point along snap angle
newPoint = DGeom.RotatePoint(newPoint, rp.AnglePoint, getRotationalSnap(ar));
setPoint(newPoint);
}
}
else
{
// set new point
setPoint(newPoint);
// test whether to snap our line
newAngle = DGeom.AngleBetweenPoints(newPoint, rp.AnglePoint);
ar = newAngle % figureSnapAngle;
double rotationalSnap = getRotationalSnap(ar);
// snap it
if (rotationalSnap != 0)
setPoint(DGeom.RotatePoint(newPoint, rp.AnglePoint, rotationalSnap));
}
break;
case DHsmSnapAngleMode.Never:
// set new point
setPoint(newPoint);
break;
}
}
else
setPoint(newPoint);
// final update rect
updateRect = updateRect.Union(GetBoundingBox(currentFigure));
break;
case DHitTest.Rotate:
System.Diagnostics.Trace.Assert(currentFigure != null, "currentFigure is null");
// initial update rect
updateRect = GetBoundingBox(currentFigure);
// apply rotation to figure
double newRot = GetRotationOfPointComparedToFigure(currentFigure, pt) - dragRot;
double r = newRot % figureSnapAngle;
switch (figureSnapAngleMode)
{
case DHsmSnapAngleMode.Always:
if (r < figureSnapAngle / 2)
currentFigure.Rotation = newRot - r;
else
currentFigure.Rotation = newRot + figureSnapAngle - r;
break;
case DHsmSnapAngleMode.Default:
if (r < figureSnapRange)
currentFigure.Rotation = newRot - r;
else if (r > figureSnapAngle - figureSnapRange)
currentFigure.Rotation = newRot + figureSnapAngle - r;
else
currentFigure.Rotation = newRot;
break;
case DHsmSnapAngleMode.Never:
currentFigure.Rotation = newRot;
break;
}
// final update rect
updateRect = updateRect.Union(GetBoundingBox(currentFigure));
#if DEBUG
// debug message
DoDebugMessage((currentFigure.Rotation * 180 / Math.PI).ToString());
#endif
break;
}
// update drawing
dv.Update(updateRect);
}
void DoSelectDefaultMouseDown(DTkViewer dv, DMouseButton btn, DPoint pt)
{
if (btn == DMouseButton.Left)
{
// find and select clicked figure
List<Figure> children = new List<Figure>();
IGlyph glyph;
Figure f = figureHandler.HitTestSelect(pt, out mouseHitTest, children, out glyph, figureSelectToggleToSelection);
// update selected figures
if (glyph != null)
{
}
else if (f != null)
{
// set drag infomation
currentFigure = f;
switch (mouseHitTest)
{
case DHitTest.Body:
// store drag point
dragPt = pt;
if (!f.Locked)
{
// drag figure start event
if (DragFigureStart != null)
DragFigureStart(null, f, dv.EngineToClient(pt));
}
break;
case DHitTest.SelectRect:
goto case DHitTest.Body;
case DHitTest.Resize:
dragPt = new DPoint(0, 0);
dragPt = CalcSizeDelta(f.RotatePointToFigure(pt), f, LockingAspectRatio || f.LockAspectRatio);
lockInitialAspectRatio = figureLockAspectRatioMode == DHsmLockAspectRatioMode.Default;
break;
case DHitTest.RepositionPoint:
break;
case DHitTest.Rotate:
dragRot = GetRotationOfPointComparedToFigure(f, pt) - f.Rotation;
if (dragRot > Math.PI)
dragRot = dragRot - (Math.PI * 2);
break;
case DHitTest.Context:
if (FigureContextClick != null)
FigureContextClick(null, f, dv.EngineToClient(pt));
break;
case DHitTest.Lock:
if (FigureLockClick != null)
FigureLockClick(null, f, dv.EngineToClient(pt));
break;
}
}
else
{
if (!figureSelectToggleToSelection)
figureHandler.ClearSelected();
dragPt = pt; // mouseHitTest = DHitTest.None
// transition
TransitionTo(DragSelect);
}
// update drawing
dv.Update();
}
}