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don't search after every single key press as that tends to freeze the gui

Browse source 
up nice and solid when viewing large PDFs, even on fast machines. instead
search after the user has paused typing

svn path=/branches/kpdf_experiments/kdegraphics/kpdf/; revision=372580
This commit is contained in:
Aaron J. Seigo 2004-12-21 19:58:51 +00:00
parent 05924776fa
commit 6511b29275
2 changed files with 20 additions and 3 deletions
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19
kpdf/searchwidget.cpp
View file

@ -10,6 +10,7 @@
// qt/kde includes
#include <qtooltip.h>
#include <qapplication.h>
#include <qtimer.h>
#include <kaction.h>
#include <kactioncollection.h>
#include <klocale.h>
@ -38,10 +39,15 @@ SearchWidget::SearchWidget( QWidget * parent, KPDFDocument * document )
setIconSize( 16 );
setMovingEnabled( false );
// a timer to ensure that we don't flood the document with requests to search
m_inputDelayTimer = new QTimer(this);
connect( m_inputDelayTimer, SIGNAL( timeout() ),
this, SLOT( startSearch() ) );
// line edit
insertLined( QString::null, LEDIT_ID, SIGNAL( textChanged(const QString &) ),
this, SLOT( slotTextChanged(const QString &) ), true,
i18n( "Enter at least 3 letters to filter pages" ), 0/*size*/, 1 );
m_linedId = insertLined( QString::null, LEDIT_ID, SIGNAL( textChanged(const QString &) ),
this, SLOT( slotTextChanged(const QString &) ), true,
i18n( "Enter at least 3 letters to filter pages" ), 0/*size*/, 1 );
// clear button (uses a lineEdit slot, so it must be created after)
insertButton( "editclear", CLEAR_ID, SIGNAL( clicked() ),
@ -70,6 +76,13 @@ void SearchWidget::slotTextChanged( const QString & text )
// if length<3 set 'red' text and send a blank string to document
QColor color = text.length() < 3 ? Qt::red : palette().active().text();
getLined( LEDIT_ID )->setPaletteForegroundColor( color );
m_inputDelayTimer->stop();
m_inputDelayTimer->start(333, true);
}
void SearchWidget::startSearch()
{
QString text = getLinedText(m_linedId);
m_document->findTextAll( text.length() < 3 ? QString::null : text, m_caseSensitive );
}

4
kpdf/searchwidget.h
View file

@ -14,6 +14,7 @@
class KPopupMenu;
class KPDFDocument;
class m_inputDelayTimer;
/**
* @short A widget for find-as-you-type search. Outputs to the Document.
@ -32,11 +33,14 @@ class SearchWidget : public KToolBar
private:
KPDFDocument * m_document;
KPopupMenu * m_caseMenu;
QTimer* m_inputDelayTimer;
int m_linedId;
bool m_caseSensitive;
private slots:
void slotTextChanged( const QString & text );
void slotCaseChanged( int index );
void startSearch();
};
#endif