querywidget.cpp

来自「This a source insight software in Linux.」· C++ 代码 · 共 620 行 · 第 1/2 页

}

/**
 * Selects the next query result record in the current query page.
 */
void QueryWidget::slotPrevResult()
{
	QueryPage* pPage;

	// Select the next record in the current page
	pPage = dynamic_cast<QueryPage*>(currentPage());
	if (pPage != NULL)
		pPage->selectPrev();
}

/**
 * Closes the current query page.
 */
void QueryWidget::slotCloseCurrent()
{
	QWidget* pPage;

	// Close the current page
	pPage = currentPage();
	if (pPage != NULL)
		slotClosePage(pPage);
}

/**
 * Closes all query pages.
 */
void QueryWidget::slotCloseAll()
{
	int nPageCount, i;
	QueryPage* pPage;
	
	// Close all pages
	nPageCount = m_pQueryTabs->count();
	for (i = 0; i < nPageCount; i++) {
		pPage = (QueryPage*)m_pQueryTabs->page(0);
		m_pQueryTabs->removePage(pPage);
		delete pPage;
	}
	
	m_pHistPage = NULL;
}

/**
 * Creates a new history page.
 */
void QueryWidget::slotAddHistoryPage()
{
	QString sTitle;
		
	// Create the page
	m_pHistPage = new HistoryPage(this);

	// Add the page, and set it as the current one
	m_pQueryTabs->insertTab(m_pHistPage, GET_PIXMAP(TabUnlocked), "");
	setPageCaption(m_pHistPage);

	// Emit the lineRequested() signal when a query record is selected on 
	// this page
	connect(m_pHistPage, SIGNAL(lineRequested(const QString&, uint)), this, 
		SLOT(slotRequestLine(const QString&, uint)));
}

/**
 * Handles the "Go->Back" menu command.
 * Moves to the previous position in the position history.
 */
void QueryWidget::slotHistoryPrev()
{
	if (m_pHistPage != NULL) {
		m_bHistEnabled = false;
		m_pHistPage->selectPrev();
		m_bHistEnabled = true;
	}
}

/**
 * Handles the "Go->Forward" menu command.
 * Moves to the next position in the position history.
 */
void QueryWidget::slotHistoryNext()
{
	if (m_pHistPage != NULL) {
		m_bHistEnabled = false;
		m_pHistPage->selectNext();
		m_bHistEnabled = true;
	}
}

/**
 * Sets the active history page, if any, as the current page.
 */
void QueryWidget::selectActiveHistory()
{
	if (m_pHistPage)
		setCurrentPage(m_pHistPage);
}

/**
 * Attaches the page operations menu to this widget.
 * The page menu is a popup menu that handles such operations as opening a
 * new page, closing a page, locking a page, etc.
 * @param	pMenu	Pointer to the popup menu
 * @param	pAction Pointer to the "Lock/Unlock" toggle action
 */
void QueryWidget::setPageMenu(QPopupMenu* pMenu, KToggleAction* pAction)
{ 
	m_pPageMenu = pMenu;
	m_pLockAction = pAction;
}

/**
 * Emits a signal indicating a certain source file and line number are
 * requested.
 * This slot is connected to the recordSelected() signal emitted by any of
 * the query pages. The signal emitted by this slot is used to display an
 * editor page at the requested line.
 * @param	pItem	The list item selected by the user
 */
void QueryWidget::slotRequestLine(const QString& sFileName, uint nLine)
{
	// Disable history if the request came from the active history page
	if (currentPage() == m_pHistPage)
		m_bHistEnabled = false;
		
	// Emit the signal
	emit lineRequested(sFileName, nLine);
	
	// Re-enable history
	if (currentPage() == m_pHistPage)
		m_bHistEnabled = true;
}

/**
 * Update the lock button when the current query page changes.
 * @param	pWidget	The new current page
 */
void QueryWidget::slotCurrentChanged(QWidget* pWidget)
{
	QueryPage* pPage;
	
	pPage = (QueryPage*)pWidget;
	m_pLockAction->setChecked(pPage->isLocked());
}

/**
 * Removes the given page from the tab widget.
 * This slot is connected to the closeRequest() signal of the KTabBar object.
 * @param	pPage	The page to close
 */
void QueryWidget::slotClosePage(QWidget* pPage)
{
	// Prompt the user before closing a locked query
	if (((QueryPage*)pPage)->isLocked()) {
		if (KMessageBox::questionYesNo(NULL, i18n("You about about to close"
			" a locked page.\nAre you sure?")) == KMessageBox::No) {
			return;
		}
	}

	// Check if the closed page is the active history page
	if (pPage == m_pHistPage)
		m_pHistPage = NULL;
	// Update the number of open history pages
	else if (dynamic_cast<HistoryPage*>(pPage) == NULL)
		m_nQueryPages--;
	
	// Remove the page and delete the object
	m_pQueryTabs->removePage(pPage);
	delete pPage;
}

/**
 * Displays a context menu for page operations.
 * This slot is connected to the contextMenu() signal, emitted by 
 * m_pQueryTabs.
 * NOTE: We assume that the first item in the menu is "New".
 * @param	pt	The point over which the mouse was clicked in request for the
 *				context menu
 */
void QueryWidget::slotContextMenu(const QPoint& pt)
{
	uint i;
	
	// Disable everything but the "new" action (clicked outside any widget)
	for (i = 1; i < m_pPageMenu->count(); i++)
		m_pPageMenu->setItemEnabled(m_pPageMenu->idAt(i), false);
	
	// Show the menu
	m_pPageMenu->popup(pt);
}

/**
 * Displays a context menu for page operations.
 * This slot is connected to the contextMenu() signal, emitted by 
 * m_pQueryTabs.
 * @param	pWidget	The page under the mouse
 * @param	pt		The point over which the mouse was clicked in request for 
 *					the	context menu
 */
void QueryWidget::slotContextMenu(QWidget* pWidget, const QPoint& pt)
{
	uint i;
	
	// Operations are on the current page, so we must ensure the clicked
	// tab becomes the current one
	setCurrentPage(pWidget);
	
	// Enable all operations
	for (i = 1; i < m_pPageMenu->count(); i++)
		m_pPageMenu->setItemEnabled(m_pPageMenu->idAt(i), true);
	
	// Show the menu
	m_pPageMenu->popup(pt);
}

/**
 * Locks/unlocks the give page.
 * @param	pPage	The page to lock or unlock
 * @param	bLock	true to lock the page, false to unlock it
 */
void QueryWidget::setPageLocked(QueryPageBase* pPage, bool bLock)
{
	// Set the locking state of the current page
	pPage->setLocked(bLock);
	m_pQueryTabs->setTabIconSet(pPage, bLock ? GET_PIXMAP(TabLocked) : 
		GET_PIXMAP(TabUnlocked));
		
	// There can only be one unlocked history page. Check if a non-active
	// query page is being unlocked
	if (isHistoryPage(pPage) && (pPage != m_pHistPage)	&& !bLock) {
		// Lock the active history page (may be NULL)
		if (m_pHistPage != NULL)
			setPageLocked(m_pHistPage, true);
		
		// Set the unlock page as the new active history page
		m_pHistPage = (HistoryPage*)pPage;
	}
}

/**
 * Ensures the current page is a query page that is ready to accept new
 * queries.
 * The function first checks the current page. If it is an unlocked query
 * page, then nothing needs to be done. Otherwise, it checks for the first
 * unlocked query page by iterating over all pages in the tab widget. If this
 * fails as well, a new query page is created.
 */
void QueryWidget::findQueryPage()
{
	QueryPage* pPage;
	int nPages, i;
	
	// First check if the current page is an unlocked query page
	pPage = dynamic_cast<QueryPage*>(currentPage());
	if (pPage != NULL) {
		if (!pPage->isLocked() && !pPage->isRunning())
			return;
	}
	
	// Look for the first unlocked query page
	nPages = m_pQueryTabs->count();
	for (i = 0; i < nPages; i++) {
		pPage = dynamic_cast<QueryPage*>(m_pQueryTabs->page(i));
		if (pPage != NULL) {
			if (!pPage->isLocked() && !pPage->isRunning()) {
				setCurrentPage(pPage);
				return;
			}
		}
	}

	// Couldn't find an unlocked query page, create a new one
	addQueryPage();
}

/**
 * Ensures an active history page exists.
 * The active history page is the only unlocked history page. If one does not
 * exist, it is created.
 */
void QueryWidget::findHistoryPage()
{
	HistoryPage* pPage;
	int nPages, i;
	
	// First check if the active history page is unlocked
	if (m_pHistPage != NULL && !m_pHistPage->isLocked())
		return;
	
	// Look for the first unlocked history page
	nPages = m_pQueryTabs->count();
	for (i = 0; i < nPages; i++) {
		pPage = dynamic_cast<HistoryPage*>(m_pQueryTabs->page(i));
		if (pPage != NULL && !pPage->isLocked()) {
			m_pHistPage = pPage;
			return;
		}
	}

	// Couldn't find an unlocked query page, create a new one
	slotAddHistoryPage();
}

#include "querywidget.moc"