daniel/QTeletextMaker
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Overhaul draggable selection rectangle logic

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The cursor always forms one corner of the selection area.
The area can also be selected with the keyboard using Shift and the
arrow keys.
This commit is contained in:
G.K.MacGregor
2021-04-27 22:07:54 +01:00
parent f258c6e095
commit 4387e9ffbd
3 changed files with 98 additions and 54 deletions
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38
mainwidget.cpp
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@@ -338,26 +338,27 @@ void TeletextWidget::keyPressEvent(QKeyEvent *event)
break;
case Qt::Key_Up:
m_teletextDocument->cursorUp();
m_teletextDocument->cursorUp(event->modifiers() & Qt::ShiftModifier);
break;
case Qt::Key_Down:
m_teletextDocument->cursorDown();
m_teletextDocument->cursorDown(event->modifiers() & Qt::ShiftModifier);
break;
case Qt::Key_Left:
m_teletextDocument->cursorLeft();
m_teletextDocument->cursorLeft(event->modifiers() & Qt::ShiftModifier);
break;
case Qt::Key_Right:
m_teletextDocument->cursorRight();
m_teletextDocument->cursorRight(event->modifiers() & Qt::ShiftModifier);
break;
case Qt::Key_Return:
case Qt::Key_Enter:
m_teletextDocument->cursorDown();
// fall through
case Qt::Key_Home:
m_teletextDocument->moveCursor(m_teletextDocument->cursorRow(), 0);
break;
case Qt::Key_Home:
m_teletextDocument->moveCursor(m_teletextDocument->cursorRow(), 0, event->modifiers() & Qt::ShiftModifier);
break;
case Qt::Key_End:
m_teletextDocument->moveCursor(m_teletextDocument->cursorRow(), 39);
m_teletextDocument->moveCursor(m_teletextDocument->cursorRow(), 39, event->modifiers() & Qt::ShiftModifier);
break;
case Qt::Key_PageUp:
@@ -416,25 +417,12 @@ void TeletextWidget::mouseMoveEvent(QMouseEvent *event)
{
if (event->buttons() & Qt::LeftButton) {
QPair<int, int> position = mouseToRowAndColumn(event->pos());
if (m_selectionInProgress || position.first != m_teletextDocument->cursorRow() || position.second != m_teletextDocument->cursorColumn()) {
int topRow, bottomRow, leftColumn, rightColumn;
m_selectionInProgress = true;
if (m_teletextDocument->cursorRow() < position.first) {
topRow = m_teletextDocument->cursorRow();
bottomRow = position.first;
} else {
topRow = position.first;
bottomRow = m_teletextDocument->cursorRow();
if (position.first != m_teletextDocument->cursorRow() || position.second != m_teletextDocument->cursorColumn()) {
if (!m_selectionInProgress) {
m_selectionInProgress = true;
m_teletextDocument->setSelectionCorner(m_teletextDocument->cursorRow(), m_teletextDocument->cursorColumn());
}
if (m_teletextDocument->cursorColumn() < position.second) {
leftColumn = m_teletextDocument->cursorColumn();
rightColumn = position.second;
} else {
leftColumn = position.second;
rightColumn = m_teletextDocument->cursorColumn();
}
m_teletextDocument->setSelection(topRow, leftColumn, bottomRow, rightColumn);
m_teletextDocument->moveCursor(position.first, position.second, true);
}
}
}