protected virtual bool FocusLastProtected()
{
MathBox box = AvailableBoxes.LastOrDefault();
if (box == null)
{
return(false);
}
FocusBox(box, BoxCaretPosition.End);
return(true);
}
private bool FocusPreviousPrivate()
{
int?focusedIndex = GetFocusedIndex();
if (focusedIndex == null)
{
return(false);
}
if (focusedIndex == 0)
{
return(false);
}
MathBox box = AvailableBoxes[focusedIndex.Value - 1];
FocusBox(box, BoxCaretPosition.End);
return(true);
}
private bool FocusNextPrivate()
{
MathBox[] visibleBoxes = AvailableBoxes;
int? focusedIndex = GetFocusedIndex();
if (focusedIndex == null)
{
return(false);
}
if (focusedIndex == visibleBoxes.Length - 1)
{
return(false);
}
MathBox box = visibleBoxes[focusedIndex.Value + 1];
FocusBox(box, BoxCaretPosition.Start);
return(true);
}
void AddColumn()
{
contentGrid.ColumnDefinitions.Add(
new ColumnDefinition()
{
Width = new GridLength(1, GridUnitType.Auto)
}
);
for (int i = 0; i < rowCount; i++)
{
var box = new MathBox();
AttachEvents(box);
box.SetValue(Grid.RowProperty, i);
box.SetValue(Grid.ColumnProperty, columnCount);
boxRows[i].Add(box);
contentGrid.Children.Add(box);
}
columnCount++;
}
private MathBox GetElementBox(ElementBox elementBox)
{
MathBox box = null;
switch (elementBox)
{
case ElementBox.Main:
box = main;
break;
case ElementBox.Sub:
box = sub;
break;
case ElementBox.Sup:
box = sup;
break;
}
return(box);
}
void AddRow()
{
contentGrid.RowDefinitions.Add(
new RowDefinition()
{
Height = new GridLength(1, GridUnitType.Auto)
}
);
var newRow = new List <MathBox>();
for (int i = 0; i < columnCount; i++)
{
var box = new MathBox();
AttachEvents(box);
box.SetValue(Grid.RowProperty, rowCount);
box.SetValue(Grid.ColumnProperty, i);
newRow.Add(box);
contentGrid.Children.Add(box);
}
boxRows.Add(newRow);
rowCount++;
}
private void AttachEvents(MathBox box)
{
box.NextMatrixRowRequested += HandleNextRowRequested;
box.NextMatrixColumnRequested += HandleNextColumnRequested;
}
public void FocusBox(ElementBox elementBox, BoxCaretPosition boxCaretPosition = BoxCaretPosition.Default)
{
MathBox mathBox = GetElementBox(elementBox);
FocusBox(mathBox, boxCaretPosition);
}
protected void SetCaretPosition(MathBox mathBox, BoxCaretPosition boxCaretPosition) => mathBox.SetCaretPosition(boxCaretPosition);
protected void FocusBox(MathBox mathBox, BoxCaretPosition boxCaretPosition = BoxCaretPosition.Start)
{
Dispatcher.InvokeAsync(mathBox.Focus,
System.Windows.Threading.DispatcherPriority.Input);
SetCaretPosition(mathBox, boxCaretPosition);
}