//if mouse moves the cell over is the mouse pointer currently positioned is drawn here
public void OnMouseMove(Object sender, MouseEventArgs e)
{
HitTestResult aHTR = VisualTreeHelper.HitTest(this, e.GetPosition(sender as IInputElement));
DrawingVisualWithDataContext aDrawingVisualWithDataContext = aHTR.VisualHit as DrawingVisualWithDataContext;
if (aDrawingVisualWithDataContext != null)
{
if (aDrawingVisualWithDataContext.DataContext != null)
{
//here is the returning to former appereance of cell where mouse pointer was positioned before
if (myLastPointedDrawingVisual != null && myLastPointedDrawingVisual.DataContext != null)
{
CellVM aCellVM_LP = myLastPointedDrawingVisual.DataContext as CellVM;
if (aCellVM_LP != null)
{
CreateCAGridCellGeometry(aCellVM_LP, ref myLastPointedDrawingVisual, false);
}
}
CellVM aCellVM = aDrawingVisualWithDataContext.DataContext as CellVM;
if (aCellVM != null)
{
CreateCAGridCellGeometry(aCellVM, ref aDrawingVisualWithDataContext, true);
myLastPointedDrawingVisual = aDrawingVisualWithDataContext;
}
}
}
}
//this method creates a specific cell
private DrawingVisualWithDataContext CreateCell(CellVM cellVMIn)
{
var aDrawingVisualWithDataContext = new DrawingVisualWithDataContext();
aDrawingVisualWithDataContext.DataContext = cellVMIn;
cellVMIn.CellStateChangedEvent += OnCellStateChanged;
CreateCAGridCellGeometry(cellVMIn, ref aDrawingVisualWithDataContext, false);
return(aDrawingVisualWithDataContext);
}
//this method draws the specific cell
private void CreateCAGridCellGeometry(CellVM cellVMIn, ref DrawingVisualWithDataContext drawingVisualWithDataContextIn, bool isMouseOverIn)
{
CAGrid2DVM aCAGrid2DVM = this.DataContext as CAGrid2DVM;
if (aCAGrid2DVM != null)
{
DrawingContext dc = drawingVisualWithDataContextIn.RenderOpen();
int aGridPenWidth = 0;
ConstantLists.LineThicknessValue.TryGetValue(aCAGrid2DVM.GridThickness, out aGridPenWidth); // the currently selected grid thickness
int aFramePenWidth = 0;
ConstantLists.LineThicknessValue.TryGetValue(aCAGrid2DVM.SelFrameThickness, out aFramePenWidth); // the currently selected frame thickness
//three brushes are drawn one after one, and that will create different areas of cell - grid, frame and content
//Brush for grid
Brush aGridBrush = new SolidColorBrush(aCAGrid2DVM.SelectedGridColor);
Rect aGridRect = new Rect(cellVMIn.X, cellVMIn.Y, aCAGrid2DVM.CellGridWidth, aCAGrid2DVM.CellGridHeight);
dc.DrawRectangle(aGridBrush, null, aGridRect);
//Brush for frame
Brush aFrameBrush = new SolidColorBrush((Color)GetFrameColor(cellVMIn, isMouseOverIn));
Rect aFrameRect = new Rect(cellVMIn.X + aGridPenWidth, cellVMIn.Y + aGridPenWidth, aCAGrid2DVM.CellGridWidth - 2 * aGridPenWidth, aCAGrid2DVM.CellGridHeight - 2 * aGridPenWidth);
dc.DrawRectangle(aFrameBrush, null, aFrameRect);
Color?aStateColor = aCAGrid2DVM.GetFillColorForState(cellVMIn.State); // current color of this cell
if (aStateColor == null)
{
throw new CAExplorerException();
}
// brush for content
Brush aContentBrush = new SolidColorBrush((Color)aStateColor);
Rect aContentRect = new Rect(cellVMIn.X + aGridPenWidth + aFramePenWidth, cellVMIn.Y + aGridPenWidth + aFramePenWidth, aCAGrid2DVM.CellObjectWidth, aCAGrid2DVM.CellObjectHeight);
dc.DrawRectangle(aContentBrush, null, aContentRect);
aGridBrush.Freeze();
aContentBrush.Freeze();
aFrameBrush.Freeze();
dc.Close();
}
}
//if cell state of some cell changed, it is needed to redraw the changed cell.
public void OnCellStateChanged(Object sender, EventArgs e)
{
for (int i = 0; i < myVisualChildren.Count; i++)
{
DrawingVisualWithDataContext aDrawingVisualWithDataContext = myVisualChildren[i] as DrawingVisualWithDataContext;
if (aDrawingVisualWithDataContext != null)
{
CellVM aCellVM = aDrawingVisualWithDataContext.DataContext as CellVM;
if (aCellVM != null)
{
if (aCellVM.IsSelected == true)
{
CreateCAGridCellGeometry(aCellVM, ref aDrawingVisualWithDataContext, false);
}
}
}
}
}
//if mouse button is pressed then current cell will be selected
public void OnMouseDown(Object sender, MouseEventArgs e)
{
HitTestResult aHTR = VisualTreeHelper.HitTest(this, e.GetPosition(sender as IInputElement));
DrawingVisualWithDataContext aDrawingVisualWithDataContext = aHTR.VisualHit as DrawingVisualWithDataContext;
if (aDrawingVisualWithDataContext != null)
{
if (aDrawingVisualWithDataContext.DataContext != null)
{
//here is the returning of before selected cell to normal state
if (myLastSelectedDrawingVisual != null && myLastSelectedDrawingVisual.DataContext != null)
{
CellVM aCellVM_LS = myLastSelectedDrawingVisual.DataContext as CellVM;
if (aCellVM_LS != null)
{
aCellVM_LS.IsSelected = false;
CreateCAGridCellGeometry(aCellVM_LS, ref myLastSelectedDrawingVisual, false);
}
}
CellVM aCellVM = aDrawingVisualWithDataContext.DataContext as CellVM;
if (aCellVM != null)
{
CAGrid2DVM aCAGrid2DVM = this.DataContext as CAGrid2DVM;
if (aCAGrid2DVM != null)
{
aCellVM.IsSelected = true;
CreateCAGridCellGeometry(aCellVM, ref aDrawingVisualWithDataContext, false);
aCAGrid2DVM.SelectedCellViewModel = aCellVM;
myLastSelectedDrawingVisual = aDrawingVisualWithDataContext;
}
}
}
}
}
//in this method the cells are modified if someting changed
private void ModifyCAGridCells()
{
if (myVisualChildren != null)
{
CAGrid2DVM aCAGrid2DVM = DataContext as CAGrid2DVM;
if (aCAGrid2DVM != null)
{
for (int i = 0; i < myVisualChildren.Count; i++)
{
DrawingVisualWithDataContext aDVWithDC = myVisualChildren[i] as DrawingVisualWithDataContext;
if (aDVWithDC != null)
{
CellVM aCellVM = aDVWithDC.DataContext as CellVM;
if (aCellVM != null)
{
CreateCAGridCellGeometry(aCellVM, ref aDVWithDC, false);
}
}
}
}
}
}
//this method creates the cells
private void CreateCAGridCells()
{
if (myVisualChildren != null)
{
myVisualChildren.Clear();
}
CAGrid2DVM aCAGrid2DVM = DataContext as CAGrid2DVM;
if (aCAGrid2DVM != null)
{
//for every Cell view model one cell is created
foreach (CellVM aCellVM in aCAGrid2DVM.Cells)
{
DrawingVisualWithDataContext aDrawingVisualWithDataContext = CreateCell(aCellVM);
if (aDrawingVisualWithDataContext != null)
{
myVisualChildren.Add(aDrawingVisualWithDataContext);
}
}
}
}
