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Allowing ScrollTo method to deal with rows and columns without breaking anything.

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BDisp
2020-12-27 19:03:49 +00:00
parent 56f2319227
commit fa57c20a48
1 changed files with 17 additions and 23 deletions
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40
Terminal.Gui/Views/TextView.cs
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@@ -863,29 +863,23 @@ namespace Terminal.Gui {
}
/// <summary>
/// Will scroll the <see cref="TextView"/> to display the specified row at the top
/// Will scroll the <see cref="TextView"/> to display the specified row at the top if <paramref name="isRow"/> is true or
/// will scroll the <see cref="TextView"/> to display the specified column at the left if <paramref name="isRow"/> is false.
/// </summary>
/// <param name="row">Row that should be displayed at the top, if the value is negative it will be reset to zero</param>
public void ScrollToRow (int row)
/// <param name="idx">Row that should be displayed at the top or Column that should be displayed at the left,
/// if the value is negative it will be reset to zero</param>
/// <param name="isRow">If true (default) the <paramref name="idx"/> is a row, column otherwise.</param>
public void ScrollTo (int idx, bool isRow = true)
{
if (row < 0) {
row = 0;
if (idx < 0) {
idx = 0;
}
topRow = row > model.Count - 1 ? model.Count - 1 : row;
SetNeedsDisplay ();
}
/// <summary>
/// Will scroll the <see cref="TextView"/> to display the specified column at the left
/// </summary>
/// <param name="col">Column that should be displayed at the left, if the value is negative it will be reset to zero</param>
public void ScrollToCol (int col)
{
if (col < 0) {
col = 0;
if (isRow) {
topRow = idx > model.Count - 1 ? model.Count - 1 : idx;
} else {
var maxlength = model.GetMaxVisibleLine (topRow, topRow + Frame.Height);
leftColumn = idx > maxlength - 1 ? maxlength - 1 : idx;
}
var maxlength = model.GetMaxVisibleLine (topRow, topRow + Frame.Height);
leftColumn = col > maxlength - 1 ? maxlength - 1 : col;
SetNeedsDisplay ();
}
@@ -1398,19 +1392,19 @@ namespace Terminal.Gui {
} else if (ev.Flags == MouseFlags.WheeledDown) {
lastWasKill = false;
columnTrack = currentColumn;
ScrollToRow (topRow + 1);
ScrollTo (topRow + 1);
} else if (ev.Flags == MouseFlags.WheeledUp) {
lastWasKill = false;
columnTrack = currentColumn;
ScrollToRow (topRow - 1);
ScrollTo (topRow - 1);
} else if (ev.Flags == MouseFlags.WheeledRight) {
lastWasKill = false;
columnTrack = currentColumn;
ScrollToCol (leftColumn + 1);
ScrollTo (leftColumn + 1, false);
} else if (ev.Flags == MouseFlags.WheeledLeft) {
lastWasKill = false;
columnTrack = currentColumn;
ScrollToCol (leftColumn - 1);
ScrollTo (leftColumn - 1, false);
}
return true;