Inbuilt QSlider functions value() and valueChanged(int) do not return the same result
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Hey guys,
I'm pretty new to Qt, so I hope my questions won't be that stupid.
I'm trying to write a small program, which should be able to convert one colorspace into another. I was trying to realize that with sliders.What I have are three sliders for RGB and maybe for example three sliders for CMY.I want to be able to move one slider (for example R), get the values of the other two (for example GB) -> convert them -> set the Slider values of CMY.
What I realized was that the inbuilt QSlider functions value() and valueChanged(int) do not return the same result.
In code, this means
SIGNAL and SLOT Stuff
@connect(ui->rSlide, SIGNAL(sliderMoved(int)), this, SLOT(getSliderValues()));
connect(ui->gSlide, SIGNAL(sliderMoved(int)), this, SLOT(getSliderValues()));
connect(ui->bSlide, SIGNAL(sliderMoved(int)), this, SLOT(getSliderValues()));@GetSliderValues()
@int MainWindow::getSliderValues()
{
red = ui->rSlide->value();
green = ui->gSlide->value();
blue = ui->bSlide->value()
}@Does not return the same Slider result then
@connect(ui->rSlide, SIGNAL(sliderMoved(int)), this, SLOT(convertFromRGB(int)));
connect(ui->gSlide, SIGNAL(sliderMoved(int)), this, SLOT(convertFromRGB(int)));
connect(ui->bSlide, SIGNAL(sliderMoved(int)), this, SLOT(convertFromRGB(int)));@ConvertFromRGB(int)
@void MainWindow::convertFromRGB(int test)
{
cout << test << endl;
}@Both Versions return a different result, they differ by 2.
Did you guys ever stumble upon something like that? Or could you tell me if I'm doing something wrong? Because I would really like to implement the first version.Thanks for all your time and in advance for the answers.
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Hi and welcome to devnet,
Pretty strange indeed, can you check whether the slider has mouse tracking enabled ? If not, the difference is normal, otherwise there's something wrong.
In any case, the valueChanged signal seems more suited to your purpose.
Also, what combo of Qt/OS/Compiler are you using ?
