void SegmentSelector::setContextHelpFor(QPoint pos,
Qt::KeyboardModifiers modifiers)
{
// If we are moving something
if (m_selectionMoveStarted)
{
const bool shift = ((modifiers & Qt::ShiftModifier) != 0);
// If shift isn't being held down
if (!shift) {
setContextHelp(tr("Hold Shift to avoid snapping to beat grid"));
} else {
clearContextHelp();
}
return;
}
ChangingSegmentPtr segment = m_canvas->getModel()->getSegmentAt(pos);
// If the mouse is hovering over the background
if (!segment) {
setContextHelp(tr("Click and drag to select segments; middle-click and drag to draw an empty segment"));
return;
}
// The mouse is hovering over a segment.
const bool ctrl = ((modifiers & Qt::ControlModifier) != 0);
// If clicking would resize
if (m_canvas->getModel()->getSelectedSegments().size() <= 1 &&
isNearEdge(segment->rect(), pos)) {
if (!ctrl) {
setContextHelp(tr("Click and drag to resize a segment; hold Ctrl as well to rescale its contents"));
} else {
setContextHelp(tr("Click and drag to rescale segment"));
}
} else { // clicking would move
if (m_canvas->getModel()->haveMultipleSelection()) {
if (!ctrl) {
setContextHelp(tr("Click and drag to move segments; hold Ctrl as well to copy them; Ctrl + Alt for linked copies"));
} else {
setContextHelp(tr("Click and drag to copy segments"));
}
} else {
if (!ctrl) {
setContextHelp(tr("Click and drag to move segment; hold Ctrl as well to copy it; Ctrl + Alt for a linked copy; double-click to edit"));
} else {
setContextHelp(tr("Click and drag to copy segment"));
}
}
}
}
void
SegmentSelector::mousePressEvent(QMouseEvent *e)
{
// Let the baseclass have a go.
SegmentTool::mousePressEvent(e);
// We only care about the left and middle mouse buttons.
if (e->button() != Qt::LeftButton &&
e->button() != Qt::MidButton)
return;
// No need to propagate.
e->accept();
QPoint pos = m_canvas->viewportToContents(e->pos());
// Get the segment that was clicked.
ChangingSegmentPtr item = m_canvas->getModel()->getSegmentAt(pos);
// If middle button...
if (e->button() == Qt::MidButton) {
// If clicked on the background, create a new segment.
if (!item) {
m_dispatchTool = m_canvas->getToolBox()->getTool(SegmentPencil::ToolName());
if (m_dispatchTool) {
m_dispatchTool->ready(); // set mouse cursor
m_dispatchTool->mousePressEvent(e);
}
}
return;
}
// Left button was pressed.
// ??? Should we split this into a midPress(e) and a leftPress(e)?
// Might improve readability a little.
// *** Adjust Selection
// Shift key adds to selection.
m_segmentAddMode = ((e->modifiers() & Qt::ShiftModifier) != 0);
// if a segment was clicked
if (item) {
bool selected = m_canvas->getModel()->isSelected(item->getSegment());
if (m_segmentAddMode) {
// toggle item selection
m_canvas->getModel()->setSelected(item->getSegment(), !selected);
} else {
if (!selected) {
// make the item the selection
m_canvas->getModel()->clearSelected();
m_canvas->getModel()->setSelected(item->getSegment());
}
}
} else { // the background was clicked
if (!m_segmentAddMode) {
// clear the selection
m_canvas->getModel()->clearSelected();
}
}
// *** Perform Functions
bool ctrl = ((e->modifiers() & Qt::ControlModifier) != 0);
// if a segment was clicked
if (item) {
// * Resize
// if only one segment is selected and clicked near the edge, resize
if (m_canvas->getModel()->getSelectedSegments().size() == 1 &&
isNearEdge(item->rect(), pos)) {
SegmentResizer *segmentResizer = dynamic_cast<SegmentResizer *>(
m_canvas->getToolBox()->getTool(SegmentResizer::ToolName()));
// Turn it over to SegmentResizer.
m_dispatchTool = segmentResizer;
m_dispatchTool->ready(); // set mouse cursor
m_dispatchTool->mousePressEvent(e);
return;
}
// * Move
// We don't dispatch to SegmentMover because SegmentMover
// doesn't support copying/linking.
bool alt = ((e->modifiers() & Qt::AltModifier) != 0);
// Ctrl and Alt+Ctrl are segment copy.
m_segmentCopyMode = ctrl;
// Alt+Ctrl is copy as link.
m_segmentCopyingAsLink = (alt && ctrl);
// If the segment is selected, put it in move mode.
if (m_canvas->getModel()->isSelected(item->getSegment())) {
m_canvas->getModel()->startChange(
item, CompositionModelImpl::ChangeMove);
}
setChangingSegment(item);
m_clickPoint = pos;
int guideX = item->rect().x();
int guideY = item->rect().y();
m_canvas->drawGuides(guideX, guideY);
setSnapTime(e, SnapGrid::SnapToBeat);
} else { // the background was clicked
if (ctrl) {
// * Create Segment
m_dispatchTool = m_canvas->getToolBox()->getTool(
SegmentPencil::ToolName());
if (m_dispatchTool) {
m_dispatchTool->ready(); // set mouse cursor
m_dispatchTool->mousePressEvent(e);
}
return;
}
// * Rubber Band
m_canvas->drawSelectionRectPos1(pos);
}
// Make sure the Segment Parameters box is updated. See
// RosegardenMainViewWidget::slotSelectedSegments().
m_canvas->getModel()->selectionHasChanged();
m_passedInertiaEdge = false;
}