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104 righe
2.3 KiB
104 righe
2.3 KiB
/*********
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*
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* This file is part of BibleTime's source code, http://www.bibletime.info/.
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*
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* Copyright 1999-2006 by the BibleTime developers.
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* The BibleTime source code is licensed under the GNU General Public License version 2.0.
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*
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**********/
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#include "cscrollbutton.h"
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#include "frontend/cbtconfig.h"
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#include <stdlib.h>
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#include <math.h>
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//TQt includes
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#include <tqevent.h>
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#include <tqapplication.h>
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#include <tqcursor.h>
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CScrollButton::CScrollButton(TQWidget *parent, const char *name ) : TQToolButton(parent,name) {
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setFocusPolicy(TQ_WheelFocus);
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setCursor( splitVCursor );
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m_isLocked = false;
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connect(this, TQT_SIGNAL(pressed() ), TQT_SLOT(was_pressed() ));
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connect(this, TQT_SIGNAL(released()), TQT_SLOT(was_released()));
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}
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const bool CScrollButton::isLocked( ) const {
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return m_isLocked;
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}
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void CScrollButton::was_pressed( ) {
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TQApplication::setOverrideCursor( BlankCursor );
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m_isLocked = true;
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lock_Point = get_lock_Point();
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emit lock()
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;
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}
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void CScrollButton::was_released( ) {
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TQApplication::restoreOverrideCursor();
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m_isLocked = false;
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emit unlock();
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}
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const TQPoint CScrollButton::get_lock_Point() const {
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return mapToGlobal( TQPoint( width()/2, height()/2 ) );
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}
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void CScrollButton::mouseMoveEvent( TQMouseEvent* e ) {
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if (m_isLocked) {
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int vchange = (TQCursor::pos().y() - lock_Point.y());
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if (abs(vchange) < 10) {
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vchange = (int)((vchange>0 ? 1 : -1) * pow(abs(vchange), 0.3));
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}
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else if (abs(vchange) < 30) {
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vchange = (int)((vchange>0 ? 1 : -1) * pow(abs(vchange), 0.6));
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}
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else if (abs(vchange) < 40) {
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vchange = (int)((vchange>0 ? 1 : -1) * pow(abs(vchange), 1.2));
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}
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else {
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vchange = (int)((vchange>0 ? 1 : -1) * pow(abs(vchange), 2.0));
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}
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if (vchange) { //not emit 0
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emit change_requested( vchange );
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}
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TQCursor::setPos( lock_Point );
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}
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else {
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TQToolButton::mouseMoveEvent(e);
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}
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}
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/** If the wheel of the mouse is used while the mouse stays over our scrollbutton the content is scrolled like the mouse was pressed and moved. */
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void CScrollButton::wheelEvent( TQWheelEvent* e ) {
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/**
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* The problem is, that wheel events do everytime have the delta value 120
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*/
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const int vchange = ((e->delta() > 0) ? (1) : (-1));
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if (vchange!=0) {//do not emit a change with value 0
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emit change_requested( vchange );
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e->accept();
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}
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else {
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e->ignore();
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}
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}
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#include "cscrollbutton.moc"
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