private void FlowchartItemMouseLeave(object sender, EventArgs e)
{
//Fix false mouse leave event caused by hint showing
Control thisItem = Parent.GetChildAtPoint(Parent.PointToClient(MousePosition));
if (thisItem == this)
{
return;
}
//Turn current resize position state to None
_resizePosition = ItemResizePosition.None;
SetCursorAccordingToResizePosition(_resizePosition);
//Reset MouseOn state for control under cursor
if (ControlUnderCursor != null)
{
if (ControlUnderCursor.State != ItemControlState.Disabled)
{
ControlUnderCursor.State = ItemControlState.Normal;
}
ControlUnderCursor = null;
Repaint();
}
}
private ItemResizePosition GetCurrentResizePosition(Point pos)
{
ItemResizePosition resizePosition = ItemResizePosition.None;
if (ItemRegion != null)
{
RectangleF rect = ClientRectangle;
rect.Size = ItemRegion.GetBounds().Size;
//Right
if (pos.X >= rect.Width - ResizeBorderWidth)
{
resizePosition = pos.Y >= rect.Height - ResizeBorderWidth
? ItemResizePosition.BottomRight
: ItemResizePosition.Right;
}
else
if (pos.Y >= rect.Height - ResizeBorderWidth)
{
resizePosition = ItemResizePosition.Bottom;
}
}
return(resizePosition);
}
private void SetCursorAccordingToResizePosition(ItemResizePosition resizePosition)
{
switch (resizePosition)
{
case ItemResizePosition.Move:
Cursor = Cursors.SizeAll;
break;
case ItemResizePosition.Bottom:
Cursor = Cursors.SizeNS;
break;
case ItemResizePosition.Right:
Cursor = Cursors.SizeWE;
break;
case ItemResizePosition.BottomRight:
Cursor = Cursors.SizeNWSE;
break;
default:
Cursor = _controlUnderCursor != null
? _controlUnderCursor.Cursor
: Cursors.Default;
break;
}
}
private void CheckOnResize(Point pos)
{
if (ControlUnderCursor == null)
{
ItemResizePosition resizePosition = GetCurrentResizePosition(pos);
SetCursorAccordingToResizePosition(resizePosition);
}
}
private void FlowchartItemMouseUp(object sender, MouseEventArgs e)
{
_mouseDown = false;
//If some control was handled mouse
if (CheckOnSelectedItemControlUnhandleMouse())
{
_itemControlThatHandledMouse = null;
}
else
{
if (LinkingArrows.Count > 0)
{
Parent.Repaint();
}
}
//If item control under cursor, check on repaint
if (!CheckOnRepaintItemControls(e.Location, e.Button))
{
//otherwise check on item resize or move
if (!ReadOnly && e.Button == MouseButtons.Left)
{
ItemResizePosition resizePosition = _resizePosition;
_resizePosition = GetCurrentResizePosition(e.Location);
SetCursorAccordingToResizePosition(_resizePosition);
//Fire actual delegate
switch (resizePosition)
{
case ItemResizePosition.Move:
{
ItemMoved?.Invoke(this);
break;
}
default:
{
if (_resizePosition <= ItemResizePosition.BottomRight &&
_resizePosition > ItemResizePosition.None &&
ItemResized != null)
{
ItemResized(this);
}
break;
}
}
}
//Call ItemMouseUp delegate
ItemMouseUp?.Invoke(this, e);
//Call ItemMouseClick delegate
ItemMouseClick?.Invoke(this);
}
}
private void FlowchartItemMouseMove(object sender, MouseEventArgs e)
{
//If mouse button pressed
if (_mouseDown)
{
//Check on mouse handled by item control
if (_resizePosition == ItemResizePosition.None &&
CheckOnSelectedItemControlHandleMouse(e.Location))
{
_resizePosition = ItemResizePosition.HandledByItemControl;
}
//If mouse handled by item control, process mouse by this control
if (_resizePosition == ItemResizePosition.HandledByItemControl)
{
CheckOnSelectedItemControlMouseMove(e.Location);
}
//Do resize control
else if (_resizePosition > ItemResizePosition.Move)
{
ResizeControl(e.Location);
}
//Do move control
else if (!ReadOnly && e.Button == MouseButtons.Left)
{
//Select actual resize position
if (_resizePosition == ItemResizePosition.None)
{
_resizePosition = ItemResizePosition.Move;
SetCursorAccordingToResizePosition(_resizePosition);
}
//Move control
MoveControl(e.Location);
//Repaint parent for linking arrows
if (Parent.LinkingArrows.Count > 0)
{
Parent.Repaint();
}
}
}
else
{
//If item control under cursor, check on repaint
if (!CheckOnRepaintItemControls(e.Location, MouseButtons.None) && !ReadOnly)
{
//otherwise check on item resize
CheckOnResize(e.Location);
}
}
}
private void FlowchartItemMouseDown(object sender, MouseEventArgs e)
{
if (Parent.SetItemSelected(this))
{
_mouseDown = true;
_previousMousePos = e.Location;
//Set item selected
Selected = true;
//If item control under cursor, check on repaint
if (!CheckOnRepaintItemControls(e.Location, e.Button))
{
//otherwise check on item resize
if (!ReadOnly && e.Button == MouseButtons.Left)
{
_resizePosition = GetCurrentResizePosition(e.Location);
}
//Call ItemMouseDown delegate
ItemMouseDown?.Invoke(this, e);
}
}
}
private bool CheckOnRepaintItemControls(Point pos, MouseButtons mb)
{
//If mouse inside workplace rectangle, get item control under cursor
IItemControl control = GetItemControlUnderCursor(pos);
if (!WorkplaceRectangle.Contains(pos) && !(control is ItemLinkPoint))
{
control = null;
}
//If control under cursor it`s not same as previous control under cursor
//or control state was changed, process changes
if (control != ControlUnderCursor || (control != null &&
(ItemControlHelper.ControlStateToMouseButton(control) != mb)))
{
//Control state was changed
if (control != null && control == ControlUnderCursor)
{
ItemControlState controlState = control.State;
ItemControlHelper.SetControlStateAccordingToMouse(control, mb);
//Check on mouse down
if (control.State == ItemControlState.ClickedLeft ||
control.State == ItemControlState.ClickedRight)
{
//Update current item control selection
SetItemControlSelected(control);
//Call ItemControlMouseDown delegate
ItemControlMouseDown?.Invoke(this, (IItemElement)control.UserObject,
new MouseEventArgs(mb, 1, pos.X, pos.Y, 0));
}
//Check on mouse click
else if ((controlState == ItemControlState.ClickedLeft ||
controlState == ItemControlState.ClickedRight) &&
control.State == ItemControlState.MouseOn)
{
//Get popped mouse button
mb = controlState == ItemControlState.ClickedLeft
? MouseButtons.Left
: MouseButtons.Right;
//Call ItemControlMouseUp delegate
ItemControlMouseUp?.Invoke(this, control.UserObject as IItemElement,
new MouseEventArgs(mb, 1, pos.X, pos.Y, 0));
//Internal ItemControlClick
OnItemControlClick(control, mb);
//Call ItemControlMouseClick delegate
ItemControlMouseClick?.Invoke(this, (IItemElement)control.UserObject);
}
}
else
{
//If control under cursor it`s not same as previous control under cursor
if (ControlUnderCursor != null && ControlUnderCursor.State != ItemControlState.Disabled)
{
ControlUnderCursor.State = ItemControlState.Normal;
}
if (control != null)
{
control.State = ItemControlState.MouseOn;
}
}
//Set current item control as Control under cursor
ControlUnderCursor = control;
//Repaint item
Repaint();
//Drop resize position
_resizePosition = ItemResizePosition.None;
SetCursorAccordingToResizePosition(_resizePosition);
//Done
return(true);
}
//No changes
return(false);
}
