private void OnMainWindowKeyUp(object sender, KeyEventArgs e)
{
// Set the IsSpec property to false if the shift buttin is not being held any more
if (e.KeyCode == Keys.ShiftKey)
{
IsSpec = false;
}
else if (State == PadStates.DrawingShape && SelectedShapeType == SelectedShapeType.Polygon &&
(e.KeyCode == Keys.Escape || e.KeyCode == Keys.Enter))
{
// When drawing a polygon, the user can finish by pressing the enter or esc keys as oppse to clicking up like with other shapes
if (CurrentPolygonLine != null)
{
Panel.Shapes.Remove(CurrentPolygonLine);
}
if (OriginMarker != null)
{
Panel.Shapes.Remove(OriginMarker);
}
// Add new polygon to list
ListViewItem item = new ListViewItem(Convert.ToString(CurrentShape.ID));
item.SubItems.Add("Polygon");
item.SubItems.Add(SelectedColor.ToString().Split('[')[1].Split(']')[0]);
item.SubItems.Add(((LineCompositeShape)CurrentShape).Origin.X + "," + ((LineCompositeShape)CurrentShape).Origin.Y);
ShapesLv.Items.Add(item);
// Go back to ready to draw
CurrentShape = null;
CurrentPolygonLine = null;
OriginMarker = null;
State = PadStates.ReadyToDraw;
Panel.Invalidate(); // Clear the temp line drawn for the polygon since it is now null
}
else if (e.KeyCode == Keys.M)
{
// M is a hot key for toggling the mode
ToggleMode();
}
else if (e.KeyCode == Keys.ControlKey)
{
IsCtrlKeyHeld = false;
}
}
// Toggles the operating mode between drawing and selecting
private void ToggleMode()
{
if (State == PadStates.DrawingShape)
{
return; // Can't toggle modes while drawing
}
else if (State == PadStates.ReadyToDraw)
{
State = PadStates.Selecting;
ModeLbl.Text = SelectingModeDisplay;
ShowHelpText();
}
else if (State == PadStates.Selecting)
{
State = PadStates.ReadyToDraw;
ModeLbl.Text = DrawingModeDisplay;
ShowHelpText();
}
}
private void OnPanelMouseDown(object sender, MouseEventArgs e)
{
switch (State)
{
case PadStates.ReadyToDraw:
// Set the initial points and let mouse move handle actually drawing the shape
x0 = e.X;
y0 = e.Y;
State = PadStates.DrawingShape;
break;
case PadStates.Selecting:
if (SelectedShapes.Count != 0)
{
State = PadStates.Moving;
OldMouseLocation = e.Location;
}
break;
}
}
private void OnShapeSelectorCbIndexChanged(object sender, EventArgs e)
{
// Change the selected shape property based on the new value of the combo box. Assume user wants to draw a shape now.
if (ShapeSelectorCb.SelectedIndex == (int)ShapeSelectorCbSelectedIndex.Rectangle)
{
SelectedShapeType = SelectedShapeType.Rectangle;
State = PadStates.ReadyToDraw;
ModeLbl.Text = DrawingModeDisplay;
ShowHelpText();
}
else if (ShapeSelectorCb.SelectedIndex == (int)ShapeSelectorCbSelectedIndex.Ellipse)
{
SelectedShapeType = SelectedShapeType.Ellipse;
State = PadStates.ReadyToDraw;
ModeLbl.Text = DrawingModeDisplay;
ShowHelpText();
}
else if (ShapeSelectorCb.SelectedIndex == (int)ShapeSelectorCbSelectedIndex.Line)
{
SelectedShapeType = SelectedShapeType.Line;
State = PadStates.ReadyToDraw;
ModeLbl.Text = DrawingModeDisplay;
ShowHelpText();
}
else if (ShapeSelectorCb.SelectedIndex == (int)ShapeSelectorCbSelectedIndex.Polygon)
{
SelectedShapeType = SelectedShapeType.Polygon;
State = PadStates.ReadyToDraw;
ModeLbl.Text = DrawingModeDisplay;
ShowHelpText();
}
else if (ShapeSelectorCb.SelectedIndex == (int)ShapeSelectorCbSelectedIndex.FreeHand)
{
SelectedShapeType = SelectedShapeType.FreeHand;
State = PadStates.ReadyToDraw;
ModeLbl.Text = DrawingModeDisplay;
ShowHelpText();
}
}
private void OnPanelMouseUp(object sender, MouseEventArgs e)
{
switch (State)
{
case PadStates.DrawingShape:
if (SelectedShapeType == SelectedShapeType.Polygon)
{
// Mouse up is when we add the current line to the polygon and set the new origin points
if (CurrentShape == null)
{
if (CurrentPolygonLine == null)
{
// There is no line yet (it is still being made, this can happen when the user clicks down and up quickly without moving the mouse)
// This allows user to start a polygon with a drag or a click.
return;
}
// There is no polygon yet so create it and add it to the panel
CurrentShape = new LineCompositeShape(CurrentPolygonLine.p0, CurrentPolygonLine.p1, new Pen(SelectedColor));
CurrentShape.ID = ID++;
Panel.Shapes.Remove(CurrentPolygonLine);
Panel.Shapes.Add(CurrentShape);
x0 = CurrentPolygonLine.p1.X;
y0 = CurrentPolygonLine.p1.Y;
Panel.Invalidate();
}
else
{
// There is already a polygon in the panel so just add the current line to it
((LineCompositeShape)CurrentShape).AddLine(CurrentPolygonLine.p1);
Panel.Shapes.Remove(CurrentPolygonLine);
x0 = CurrentPolygonLine.p1.X;
y0 = CurrentPolygonLine.p1.Y;
Panel.Invalidate();
}
}
else
{
// The shape is not a polygon so it is done being drawn and is already in Shapes so just add it to the ListView of Shapes
ListViewItem item = new ListViewItem(Convert.ToString(CurrentShape.ID));
switch (SelectedShapeType)
{
case SelectedShapeType.Rectangle:
item.SubItems.Add("Rectangle");
item.SubItems.Add(SelectedColor.ToString().Split('[')[1].Split(']')[0]);
item.SubItems.Add(((RectangleBasedShape)CurrentShape).x0 + "," + ((RectangleBasedShape)CurrentShape).y0);
ShapesLv.Items.Add(item);
break;
case SelectedShapeType.Ellipse:
item.SubItems.Add("Ellipse");
item.SubItems.Add(SelectedColor.ToString().Split('[')[1].Split(']')[0]);
item.SubItems.Add(((RectangleBasedShape)CurrentShape).x0 + "," + ((RectangleBasedShape)CurrentShape).y0);
ShapesLv.Items.Add(item);
break;
case SelectedShapeType.Line:
item.SubItems.Add("Line");
item.SubItems.Add(SelectedColor.ToString().Split('[')[1].Split(']')[0]);
item.SubItems.Add(((Line)CurrentShape).p0.X + "," + ((Line)CurrentShape).p0.Y);
ShapesLv.Items.Add(item);
break;
case SelectedShapeType.FreeHand:
item.SubItems.Add("Free-Hand");
item.SubItems.Add(SelectedColor.ToString().Split('[')[1].Split(']')[0]);
item.SubItems.Add(((LineCompositeShape)CurrentShape).Origin.X + "," + ((LineCompositeShape)CurrentShape).Origin.Y);
ShapesLv.Items.Add(item);
break;
}
//Set the current shape to null and go back to ready.
CurrentShape = null;
State = PadStates.ReadyToDraw;
}
break;
case PadStates.Moving:
State = PadStates.Selecting;
break;
}
}