protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (!Enabled) return;
if (panMode)
{
Point ptDev = new Point(e.X, e.Y);
int dx = ptDev.X - ptStartDragDev.X;
int dy = ptDev.Y - ptStartDragDev.Y;
Graphics gp = this.CreateGraphics();
gp.ResetTransform();
gp.PageUnit = measureUnit;
gp.PageScale = zoomFactor / 100F;
PointF diff = Utilities.deviceToDoc(gp, dx, dy);
RectangleF rcPage = Utilities.deviceToDoc(gp, ClientRectangle);
gp.Dispose();
float sx = panPoint.X - diff.X;
float sy = panPoint.Y - diff.Y;
scrollStayInDoc(sx, sy, rcPage);
return;
}
// get mouse position in document coordinates
Graphics g = this.CreateGraphics();
setTransforms(g);
PointF ptCurr = Utilities.deviceToDoc(g, e.X, e.Y);
if (interaction != null && interaction.CurrentObject != null &&
Behavior != BehaviorType.DoNothing && this.Capture && buttonDown[0])
{
if (autoScroll) checkAutoScroll(e);
// for easier selection check if distance the mouse moved is not too small
if (Math.Abs(ptStartDragDev.X - e.X) > 2 ||
Math.Abs(ptStartDragDev.Y - e.Y) > 2)
mouseMoved = true;
// set the mouse pointer
if (mouseMoved)
interaction.setCursor(ptCurr, this);
// prepare for drawing
Bitmap tempBuffer = createBackBuffer(ClientRectangle, g);
Graphics tg = Graphics.FromImage(tempBuffer);
tg.SmoothingMode = antiAlias;
tg.TextRenderingHint = textRendering;
// update the item position
redrawNonModified = false;
bool redrawBack = interaction.update(ptCurr, this);
if (redrawBack || redrawNonModified)
{
drawFlowChart(docBuffer, ClientRectangle, true);
redrawNonModified = false;
}
// update document size if needed
if (autoSizeDoc != MindFusion.FlowChartX.AutoSize.None)
sizeDocForItem(interaction.CurrentObject);
// paint the invalid rect
RectangleF rcInvDoc = interaction.InvalidRect;
Rectangle rcInvDev = Utilities.docToDevice(g, rcInvDoc);
rcInvDev.Inflate(2, 2);
rcInvDev.Intersect(ClientRectangle);
if (forceCacheRedraw)
{
rcInvDev = ClientRectangle;
forceCacheRedraw = false;
}
tg.DrawImage(docBuffer, rcInvDev, rcInvDev, GraphicsUnit.Pixel);
// redraw the items
setTransforms(tg);
if (!selectionOnTop)
{
// all items must be repainted in order to
// preserve their Z order appearance
drawAllItems(tg, rcInvDoc);
// item being created
if (interaction.Action == Action.Create && interaction.CurrentObject != null)
{
if (interaction.CurrentObject != selection)
{
if (shadowsStyle != ShadowsStyle.None)
drawObjectWithShadow(tg, interaction.CurrentObject, false);
else
drawObject(tg, interaction.CurrentObject, false);
}
else
{
selection.Draw(tg, false);
}
}
}
else
{
// items that aren't being modified are already painted in the
// back buffer; now repaint only the items being modified
if (interaction.CurrentObject != selection)
{
if (shadowsStyle != ShadowsStyle.None)
drawObjectWithShadow(tg, interaction.CurrentObject, interaction.Action == Action.Modify);
else
drawObject(tg, interaction.CurrentObject, interaction.Action == Action.Modify);
}
else
{
// draw selection
PainterVisitor painter = new PainterVisitor(tg, false);
selection.visitHierarchy(painter);
selection.Draw(tg, false);
}
}
if (interaction.Action == Action.Modify && showHandlesOnDrag)
interaction.CurrentObject.drawSelHandles(tg, ActiveMnpColor);
if ((showAnchors & ShowAnchors.Auto) != 0 && autoAnchorsObj != null)
autoAnchorsObj.drawAnchors(tg);
// blit offscreen to screen
unsetTransforms(g);
Rectangle clr = ClientRectangle;
if (hScrollBar != null && hScrollBar.Visible)
clr.Height -= hScrollBar.Height;
if (vScrollBar != null && vScrollBar.Visible)
clr.Width -= vScrollBar.Width;
rcInvDev.Intersect(clr);
g.DrawImage(tempBuffer, rcInvDev, rcInvDev, GraphicsUnit.Pixel);
// clean up
tg.Dispose();
tempBuffer.Dispose();
}
else // not dragging
{
if ((showAnchors & ShowAnchors.Auto) != 0)
drawAutoAnchors(g, ptCurr);
if (modificationStart == ModificationStyle.AutoHandles)
drawAutoHandles(g, ptCurr);
currentBehavior.SetMouseCursor(ptCurr);
setTooltipText(ptCurr);
}
// clean up
g.Dispose();
}
private void drawHierarchy(Graphics g, ChartObject obj, bool shadows)
{
if (!sortGroupsByZ)
{
PainterVisitor painter = new PainterVisitor(g, shadows);
obj.visitHierarchy(painter);
}
else
{
MethodCallVisitor visitor =
new MethodCallVisitor(new VisitOperation(addToSortedList));
obj.visitHierarchy(visitor);
foreach (ChartObject item in sortedByZ.Keys)
item.Draw(g, shadows);
sortedByZ.Clear();
}
}