qvfbratedlg.cpp

来自「Qt4.5 提供的qvfb,最新版本」· C++ 代码 · 共 104 行

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#include "qvfbratedlg.h"
#include <QLayout>
#include <QLabel>
#include <qslider.h>
#include <QPushButton>

QT_BEGIN_NAMESPACE

QVFbRateDialog::QVFbRateDialog(int rate, QWidget *parent)
    : QDialog(parent)
{
    oldRate = rate;

    QVBoxLayout *tl = new QVBoxLayout(this);
    tl->setMargin(5);

    QLabel *label = new QLabel("Target frame rate:", this);
    tl->addWidget(label);

    QHBoxLayout *hl = new QHBoxLayout();
    tl->addItem(hl);
    rateSlider = new QSlider(Qt::Horizontal);
    rateSlider->setMinimum(1);
    rateSlider->setMaximum(100);
    rateSlider->setPageStep(10);
    rateSlider->setValue(rate);
    hl->addWidget(rateSlider);
    connect(rateSlider, SIGNAL(valueChanged(int)), this, SLOT(rateChanged(int)));
    rateLabel = new QLabel(QString("%1fps").arg(rate), this);
    hl->addWidget(rateLabel);

    hl = new QHBoxLayout();
    tl->addItem(hl);
    QPushButton *pb = new QPushButton("OK", this);
    connect(pb, SIGNAL(clicked()), this, SLOT(ok()));
    hl->addWidget(pb);
    pb = new QPushButton("Cancel", this);
    connect(pb, SIGNAL(clicked()), this, SLOT(cancel()));
    hl->addWidget(pb);
}

void QVFbRateDialog::rateChanged(int r)
{
    if (rateSlider->value() != r)
	rateSlider->setValue(r);
    rateLabel->setText(QString("%1fps").arg(r));
    emit updateRate(r);
}

void QVFbRateDialog::cancel()
{
    rateChanged(oldRate);
    reject();
}

void QVFbRateDialog::ok()
{
    oldRate = rateSlider->value();
    accept();
}

QT_END_NAMESPACE