internal static bool CheckIsDoubleClick(
MouseClickHistory prevClick, MouseClickHistory curClick)
{
if (prevClick == null || (curClick.Source != prevClick.Source))
{
return(false); // Click events did not come from same source
}
int clickInterval = curClick.Timestamp - prevClick.Timestamp;
if (clickInterval > System.Windows.Forms.SystemInformation.DoubleClickTime)
{
return(false); // Time difference is more than system DoubleClickTime
}
double diff = Math.Abs(prevClick.Position.X - curClick.Position.X);
if (diff > Configurations.DoubleClickAcceptableDistance)
{
return(false); // Click is beyond acceptable threshold.
}
diff = Math.Abs(prevClick.Position.Y - curClick.Position.Y);
if (diff > Configurations.DoubleClickAcceptableDistance)
{
return(false); // Click is beyond acceptable threshold.
}
return(true);
}
internal bool HandleLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (false != ignoreMouseClick)
{
ignoreMouseClick = false;
return(false);
}
MouseClickHistory curClick = new MouseClickHistory(sender, e);
bool eventHandled = false;
bool returnFocusToSearch = true;
if (this.currentState == State.Connection)
{
// Clicking on the canvas while connecting simply cancels
// the operation and drop the temporary connector.
SetCurrentState(State.None);
eventHandled = true; // Mouse event handled.
}
else if (this.currentState == State.None)
{
// Record the mouse down position.
IInputElement element = sender as IInputElement;
mouseDownPos = e.GetPosition(element);
// We'll see if there is any node being clicked on. If so,
// then the state machine should initiate a drag operation.
if (null != GetSelectableFromPoint(mouseDownPos))
{
InitiateDragSequence();
}
else if (e.Source is Dynamo.Controls.EndlessGrid && MouseClickHistory.CheckIsDoubleClick(prevClick, curClick))
{
CreateCodeBlockNode(mouseDownPos); // Double clicking on background (EndlessGrid)
returnFocusToSearch = false; // Keep the focus on newly created code block node.
prevClick = null;
}
else
{
InitiateWindowSelectionSequence();
}
prevClick = curClick;
eventHandled = true; // Mouse event handled.
}
else if (this.currentState == State.PanMode)
{
owningWorkspace.CurrentCursor = CursorLibrary.GetCursor(CursorSet.HandPanActive);
}
if (returnFocusToSearch != false)
{
dynSettings.ReturnFocusToSearch();
}
return(eventHandled);
}
public static bool CheckIsDoubleClick(MouseClickHistory prevClick, MouseClickHistory curClick)
{
if (prevClick == null || (curClick.Source != prevClick.Source))
return false; // Click events did not come from same source
int clickInterval = curClick.Timestamp - prevClick.Timestamp;
if (clickInterval > System.Windows.Forms.SystemInformation.DoubleClickTime)
return false; // Time difference is more than system DoubleClickTime
double diff = Math.Abs(prevClick.Position.X - curClick.Position.X);
if (diff > Configurations.DoubleClickAcceptableDistance)
return false; // Click is beyond acceptable threshold.
diff = Math.Abs(prevClick.Position.Y - curClick.Position.Y);
if (diff > Configurations.DoubleClickAcceptableDistance)
return false; // Click is beyond acceptable threshold.
return true;
}
internal bool HandleLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (false != ignoreMouseClick)
{
ignoreMouseClick = false;
return false;
}
MouseClickHistory curClick = new MouseClickHistory(sender, e);
bool eventHandled = false;
if (this.currentState == State.Connection)
{
// Clicking on the canvas while connecting simply cancels
// the operation and drop the temporary connector.
SetCurrentState(State.None);
eventHandled = true; // Mouse event handled.
}
else if (this.currentState == State.None)
{
// Record the mouse down position.
IInputElement element = sender as IInputElement;
mouseDownPos = e.GetPosition(element);
// We'll see if there is any node being clicked on. If so,
// then the state machine should initiate a drag operation.
if (null != GetSelectableFromPoint(mouseDownPos))
InitiateDragSequence();
else if (e.Source is Dynamo.Controls.EndlessGrid && MouseClickHistory.CheckIsDoubleClick(prevClick, curClick))
{
CreateCodeBlockNode(mouseDownPos); // Double clicking on background (EndlessGrid)
prevClick = null;
}
else
InitiateWindowSelectionSequence();
prevClick = curClick;
eventHandled = true; // Mouse event handled.
}
else if (this.currentState == State.PanMode)
{
owningWorkspace.CurrentCursor = CursorLibrary.GetCursor(CursorSet.HandPanActive);
}
dynSettings.ReturnFocusToSearch();
return eventHandled;
}
internal bool HandleLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (false != ignoreMouseClick)
{
ignoreMouseClick = false;
return false;
}
MouseClickHistory curClick = new MouseClickHistory(sender, e);
bool eventHandled = false;
bool returnFocusToSearch = true;
if (this.currentState == State.Connection)
{
// Clicking on the canvas while connecting simply cancels
// the operation and drop the temporary connector.
SetCurrentState(State.None);
eventHandled = true; // Mouse event handled.
}
else if (this.currentState == State.None)
{
// Record the mouse down position.
IInputElement element = sender as IInputElement;
mouseDownPos = e.GetPosition(element);
// We'll see if there is any node being clicked on. If so,
// then the state machine should initiate a drag operation.
if (null != GetSelectableFromPoint(mouseDownPos))
InitiateDragSequence();
else
{
if ((e.Source is Dynamo.Controls.EndlessGrid) == false)
InitiateWindowSelectionSequence();
else if (!MouseClickHistory.CheckIsDoubleClick(prevClick, curClick))
InitiateWindowSelectionSequence();
else
{
// Double-clicking on the background grid results in
// a code block node being created, in which case we
// should keep the input focus on the code block to
// avoid it being dismissed (with empty content).
//
CreateCodeBlockNode(mouseDownPos);
returnFocusToSearch = false;
curClick = null;
}
}
prevClick = curClick;
eventHandled = true; // Mouse event handled.
}
else if (this.currentState == State.PanMode)
{
var c = CursorLibrary.GetCursor(CursorSet.HandPanActive);
owningWorkspace.CurrentCursor = c;
}
else if (this.currentState == State.OrbitMode)
{
var c = CursorLibrary.GetCursor(CursorSet.HandPanActive);
owningWorkspace.CurrentCursor = c;
}
if (returnFocusToSearch != false)
dynSettings.ReturnFocusToSearch();
return eventHandled;
}
internal bool HandleLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (false != ignoreMouseClick)
{
ignoreMouseClick = false;
return(false);
}
MouseClickHistory curClick = new MouseClickHistory(sender, e);
bool eventHandled = false;
bool returnFocusToSearch = true;
if (this.currentState == State.Connection)
{
// Clicking on the canvas while connecting simply cancels
// the operation and drop the temporary connector.
SetCurrentState(State.None);
eventHandled = true; // Mouse event handled.
}
else if (this.currentState == State.None)
{
// Record the mouse down position.
IInputElement element = sender as IInputElement;
mouseDownPos = e.GetPosition(element);
// We'll see if there is any node being clicked on. If so,
// then the state machine should initiate a drag operation.
if (null != GetSelectableFromPoint(mouseDownPos))
{
InitiateDragSequence();
returnFocusToSearch = ShouldDraggingReturnFocusToSearch();
}
else
{
if ((e.Source is Dynamo.Controls.EndlessGrid) == false)
{
InitiateWindowSelectionSequence();
}
else if (!MouseClickHistory.CheckIsDoubleClick(prevClick, curClick))
{
InitiateWindowSelectionSequence();
}
else
{
// Double-clicking on the background grid results in
// a code block node being created, in which case we
// should keep the input focus on the code block to
// avoid it being dismissed (with empty content).
//
CreateCodeBlockNode(mouseDownPos);
returnFocusToSearch = false;
curClick = null;
}
}
prevClick = curClick;
eventHandled = true; // Mouse event handled.
}
else if (this.currentState == State.PanMode)
{
var c = CursorLibrary.GetCursor(CursorSet.HandPanActive);
owningWorkspace.CurrentCursor = c;
}
else if (this.currentState == State.OrbitMode)
{
var c = CursorLibrary.GetCursor(CursorSet.HandPanActive);
owningWorkspace.CurrentCursor = c;
}
if (returnFocusToSearch != false)
{
owningWorkspace.DynamoViewModel.ReturnFocusToSearch();
}
return(eventHandled);
}
