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Implement row insertion and deletion

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This commit is contained in:
G.K.MacGregor
2020-10-27 15:17:54 +00:00
parent 01dcff944d
commit abba8127d9
4 changed files with 155 additions and 3 deletions
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99
document.cpp
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@@ -279,10 +279,12 @@ void TeletextDocument::cursorRight()
emit cursorMoved();
}
void TeletextDocument::moveCursor(int newCursorRow, int newCursorColumn)
void TeletextDocument::moveCursor(int cursorRow, int cursorColumn)
{
m_cursorRow = newCursorRow;
m_cursorColumn = newCursorColumn;
if (cursorRow != -1)
m_cursorRow = cursorRow;
if (cursorColumn != -1)
m_cursorColumn = cursorColumn;
emit cursorMoved();
}
@@ -410,6 +412,97 @@ void BackspaceCommand::undo()
}
InsertRowCommand::InsertRowCommand(TeletextDocument *teletextDocument, bool copyRow, QUndoCommand *parent) : QUndoCommand(parent)
{
m_teletextDocument = teletextDocument;
m_subPageIndex = teletextDocument->currentSubPageIndex();
m_row = teletextDocument->cursorRow();
m_copyRow = copyRow;
}
void InsertRowCommand::redo()
{
m_teletextDocument->selectSubPageIndex(m_subPageIndex);
m_teletextDocument->moveCursor(m_row, -1);
// Store copy of the bottom row we're about to push out, for undo
for (int c=0; c<40; c++)
m_deletedBottomRow[c] = m_teletextDocument->currentSubPage()->character(23, c);
// Shuffle lines below the inserting row downwards without affecting the FastText row
for (int r=22; r>=m_row; r--)
for (int c=0; c<40; c++)
m_teletextDocument->currentSubPage()->setCharacter(r+1, c, m_teletextDocument->currentSubPage()->character(r, c));
if (m_copyRow)
setText(QObject::tr("insert copy row"));
else {
// The above shuffle leaves a duplicate of the current row, so blank it if requested
for (int c=0; c<40; c++)
m_teletextDocument->currentSubPage()->setCharacter(m_row, c, ' ');
setText(QObject::tr("insert blank row"));
}
emit m_teletextDocument->refreshNeeded();
}
void InsertRowCommand::undo()
{
m_teletextDocument->selectSubPageIndex(m_subPageIndex);
m_teletextDocument->moveCursor(m_row, -1);
// Shuffle lines below the deleting row upwards without affecting the FastText row
for (int r=m_row; r<23; r++)
for (int c=0; c<40; c++)
m_teletextDocument->currentSubPage()->setCharacter(r, c, m_teletextDocument->currentSubPage()->character(r+1, c));
// Now repair the bottom row we pushed out
for (int c=0; c<40; c++)
m_teletextDocument->currentSubPage()->setCharacter(23, c, m_deletedBottomRow[c]);
if (m_copyRow)
setText(QObject::tr("insert copy row"));
else
setText(QObject::tr("insert blank row"));
emit m_teletextDocument->refreshNeeded();
}
DeleteRowCommand::DeleteRowCommand(TeletextDocument *teletextDocument, QUndoCommand *parent) : QUndoCommand(parent)
{
m_teletextDocument = teletextDocument;
m_subPageIndex = teletextDocument->currentSubPageIndex();
m_row = teletextDocument->cursorRow();
}
void DeleteRowCommand::redo()
{
m_teletextDocument->selectSubPageIndex(m_subPageIndex);
m_teletextDocument->moveCursor(m_row, -1);
// Store copy of the row we're going to delete, for undo
for (int c=0; c<40; c++)
m_deletedRow[c] = m_teletextDocument->currentSubPage()->character(m_row, c);
// Shuffle lines below the deleting row upwards without affecting the FastText row
for (int r=m_row; r<23; r++)
for (int c=0; c<40; c++)
m_teletextDocument->currentSubPage()->setCharacter(r, c, m_teletextDocument->currentSubPage()->character(r+1, c));
// If we deleted the FastText row blank that row, otherwise blank the last row
int blankingRow = (m_row < 24) ? 23 : 24;
for (int c=0; c<40; c++)
m_teletextDocument->currentSubPage()->setCharacter(blankingRow, c, ' ');
setText(QObject::tr("delete row"));
emit m_teletextDocument->refreshNeeded();
}
void DeleteRowCommand::undo()
{
m_teletextDocument->selectSubPageIndex(m_subPageIndex);
m_teletextDocument->moveCursor(m_row, -1);
// Shuffle lines below the inserting row downwards without affecting the FastText row
for (int r=22; r>=m_row; r--)
for (int c=0; c<40; c++)
m_teletextDocument->currentSubPage()->setCharacter(r+1, c, m_teletextDocument->currentSubPage()->character(r, c));
// Now repair the row we deleted
for (int c=0; c<40; c++)
m_teletextDocument->currentSubPage()->setCharacter(m_row, c, m_deletedRow[c]);
setText(QObject::tr("delete row"));
emit m_teletextDocument->refreshNeeded();
}
InsertSubPageCommand::InsertSubPageCommand(TeletextDocument *teletextDocument, bool afterCurrentSubPage, bool copySubPage, QUndoCommand *parent) : QUndoCommand(parent)
{
m_teletextDocument = teletextDocument;