git.maemo.org Git - keepassx/blob - src/lib/WaitAnimationWidget.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005-2006 by Tarek Saidi                                *
   3  *   tarek.saidi@arcor.de                                                  *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; version 2 of the License.               *
   8
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #include "WaitAnimationWidget.h"
  22
  23 WaitAnimationWidget::WaitAnimationWidget(QWidget* parent):QWidget(parent){
  24         speed=60;
  25         setRefreshRate(25);
  26         CurAngle=0;
  27         for(int i=0;i<6;i++){
  28                 float diff=CurAngle-i*0.16666667f;
  29                 if(diff>0.5f)
  30                         diff=1.0f-diff;
  31                 if(diff<-0.5f)
  32                         diff=1.0f+diff;
  33                 CircSizes[i]=1.0+exp(-14.0f*diff*diff);
  34         }
  35         connect(&timer,SIGNAL(timeout()),this,SLOT(refreshAnimation()));
  36 }
  37
  38 WaitAnimationWidget::~WaitAnimationWidget(){
  39         timer.stop();
  40 }
  41
  42 void WaitAnimationWidget::start(){
  43         timer.start();
  44 }
  45
  46 void WaitAnimationWidget::stop(){
  47         timer.stop();
  48         repaint();
  49 }
  50
  51 void WaitAnimationWidget::setRefreshRate(int fps){
  52         DiffAngle=1.0f/((60.0f/(float)speed)*(float)fps);
  53         timer.setInterval((int) ((1.0f/(float)fps)*1000.0f));
  54 }
  55
  56 void WaitAnimationWidget::refreshAnimation(){
  57         CurAngle+=DiffAngle;
  58         if(CurAngle>1.0f)CurAngle-=1.0f;
  59         for(int i=0;i<6;i++){
  60                 float diff=CurAngle-i*0.16666667f;
  61                 if(diff>0.5f)
  62                         diff=1.0f-diff;
  63                 if(diff<-0.5f)
  64                         diff=1.0f+diff;
  65                 CircSizes[i]=1.0+exp(-14.0f*diff*diff);
  66         }
  67         repaint();
  68 }
  69
  70 void WaitAnimationWidget::paintEvent(QPaintEvent* event){
  71         Q_UNUSED(event);
  72         if(timer.isActive()){
  73                 QPainter painter(this);
  74                 painter.setRenderHints(QPainter::Antialiasing,true);
  75                 painter.setBrush(Qt::black);
  76                 painter.setPen(Qt::black);
  77                 for(int i=0;i<6;i++){
  78                         float d=CircSizes[i]*5.0;
  79                         QRectF rect(CircPositions[i].x()-d/2,CircPositions[i].y()-d/2,d,d);
  80                         painter.drawEllipse(rect);
  81                 }
  82         }
  83 }
  84
  85 void WaitAnimationWidget::resizeEvent(QResizeEvent* event){
  86         Q_UNUSED(event);
  87         float r;
  88         if(width()>height())
  89                 r=height()/2;
  90         else
  91                 r=width()/2;
  92         for(int i=0;i<6;i++){
  93                 CircPositions[i].setX((r-10)*cos(-2.0*3.14159265*(0.16666667*i))+r);
  94                 CircPositions[i].setY((r-10)*sin(-2.0*3.14159265*(0.16666667*i))+r);
  95         }
  96 }