private void UpdatePvw()
{
if (textList == null)
{
return;
}
UpdateBorders();
PvwContent.Content = textList[pvwManager.PageNumber];
PvwContent.Foreground = isTitleList[pvwManager.PageNumber] ? titleColor : Brushes.White;
PvwPage.Content = pvwManager.PageNumber;
if (WrapPanelPageList != null && WrapPanelPageList.Children.Count > 1)
{
double offset = ScrollViewerPageList.VerticalOffset;
int rowSize = (int)(WrapPanelPageList.ActualWidth / PAGE_ITEM_FULL_WIDTH);
int firstFullyDisplayedRow = (int)Math.Ceiling(offset / PAGE_ITEM_FULL_HEIGHT);
int lastFullyDisplayedRow = (int)Math.Floor((offset + ScrollViewerPageList.ViewportHeight) / PAGE_ITEM_FULL_HEIGHT) - 1;
int currentPvwRow = (pvwManager.PageNumber - 1) / rowSize;
if (currentPvwRow < firstFullyDisplayedRow)
{
ScrollViewerPageList.ScrollToVerticalOffset(currentPvwRow * PAGE_ITEM_FULL_HEIGHT);
}
else if (currentPvwRow > lastFullyDisplayedRow)
{
ScrollViewerPageList.ScrollToVerticalOffset((currentPvwRow - lastFullyDisplayedRow + firstFullyDisplayedRow) * PAGE_ITEM_FULL_HEIGHT);
}
}
}
private void WindowMainWindow_PreviewKeyDown(object sender, KeyEventArgs e) // process input when keydown
{
if (Keyboard.Modifiers == ModifierKeys.Shift && e.Key == Key.Escape) // Shift+ESC: presenter window button
{
OpenAndClosePresenterWindow();
return;
}
if (Keyboard.Modifiers == ModifierKeys.Control && e.Key == Key.Enter) // Ctrl+Enter: free text presentation
{
FreeCut();
return;
}
if (MenuItemRefresh.IsEnabled == true && (Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control && e.Key == Key.R) // Ctrl+R: reload the current file
{
OpenTxtFile(false);
return;
}
if (TextBoxFreeContent.IsFocused) // free text presentation box is focused
{
switch (e.Key)
{
case Key.Escape:
KillFocus();
break;
case Key.OemPeriod: // normal .(>) key
case Key.Decimal: // keypad .(Del) key
if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
{
ClearPgm();
}
break;
}
}
else if (TextBoxFreeLines.IsFocused) // free text presentation line limit box is focused
{
if (e.Key == Key.Enter && (Keyboard.Modifiers & ModifierKeys.Control) != ModifierKeys.Control)
{
CheckFreeLine();
}
}
else
{
if ((Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift) // + Shift
{
switch (e.Key)
{
case Key.Up:
ScrollViewerPageList.ScrollToVerticalOffset(ScrollViewerPageList.VerticalOffset - PAGE_ITEM_FULL_HEIGHT);
e.Handled = true;
break;
case Key.Down:
ScrollViewerPageList.ScrollToVerticalOffset(ScrollViewerPageList.VerticalOffset + PAGE_ITEM_FULL_HEIGHT);
e.Handled = true;
break;
}
}
else // no modifier
{
if (e.Key >= Key.NumPad0 && e.Key <= Key.NumPad9) // numpad
{
pageNum.Add(e.Key - Key.NumPad0);
UpdatePageIndicator();
return;
}
if (e.Key >= Key.D0 && e.Key <= Key.D9) // number keys above Q-P
{
pageNum.Add(e.Key - Key.D0);
UpdatePageIndicator();
return;
}
switch (e.Key)
{
case Key.Enter:
CutAction();
KillFocus();
e.Handled = true;
break;
case Key.Up:
if (WrapPanelPageList != null && WrapPanelPageList.Children.Count > 1)
{
pvwManager.PageNumber -= (int)(WrapPanelPageList.ActualWidth / PAGE_ITEM_FULL_WIDTH);
UpdatePvw();
}
KillFocus();
e.Handled = true;
break;
case Key.Down:
if (WrapPanelPageList != null && WrapPanelPageList.Children.Count > 1)
{
pvwManager.PageNumber += (int)(WrapPanelPageList.ActualWidth / PAGE_ITEM_FULL_WIDTH);
UpdatePvw();
}
KillFocus();
e.Handled = true;
break;
case Key.OemPeriod: // normal .(>) key
case Key.Decimal: // keypad .(Del) key
ClearPgm();
KillFocus();
e.Handled = true;
break;
case Key.Left:
pvwManager.PageNumber -= 1;
UpdatePvw();
KillFocus();
e.Handled = true;
break;
case Key.Right:
pvwManager.PageNumber += 1;
UpdatePvw();
KillFocus();
e.Handled = true;
break;
}
}
}
}
