C++ 更改 QProgressBar 的颜色
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Change the color of a QProgressBar
提问by steps
I am running ubuntu 11.04. This is what my progress bars look like:
我正在运行 ubuntu 11.04。这是我的进度条的样子：
I am showing the progress bars in a batch processing window (one per batch item) and would like to use them as a status indicator (green while all is going well, red in case of errors, ...).
我在批处理窗口中显示进度条（每个批处理项目一个），并希望将它们用作状态指示器（绿色表示一切顺利，红色表示错误，......）。
I have tried several suggestions, including the ones made to thisalmost identical question. Unfortunately, I couldn't make it work and the documentationon customizing QProgressBars doesn't help me either, so I would be very grateful for any suggestions as to what I'm doing wrong.
我尝试了几个建议，包括针对这个几乎相同的问题提出的建议。不幸的是，我无法让它工作，关于自定义 QProgressBars的文档也没有帮助我，所以我将非常感谢任何关于我做错了什么的建议。
I have subclassed the QProgressBar as suggested and have tried using stylesheets as well as the palette (not at the same time but as alternatives). With stylesheets, I can't make it look anything like the regular progress bars. Changing the color is really all I want to do, so I figured it should be much easier to do that by use of a palette instead of a stylesheet, but with the palette nothing happens at all.
我已经按照建议对 QProgressBar 进行了子类化，并尝试使用样式表和调色板（不是同时使用，而是作为替代方案）。使用样式表，我不能让它看起来像常规的进度条。改变颜色确实是我想要做的，所以我认为通过使用调色板而不是样式表应该更容易做到这一点，但使用调色板根本没有任何反应。
Here is one of the versions I've tried for the palette:
这是我为调色板尝试过的版本之一：
#include "myprogressbar.h"
#include <QtGui/QPalette>
MyProgressBar::MyProgressBar(QWidget *parent) :
QProgressBar(parent)
{}
void MyProgressBar::onProgress(int value, int maximum, QString phase)
{
setMaximum(maximum);
setValue(value);
setFormat(phase);
QPalette p = this->palette();
p.setColor(QPalette::Highlight, QColor(Qt::green));
this->setPalette(p);
}
...
I also tried the version suggested here, but that didn't help either.
我也尝试了此处建议的版本，但这也无济于事。
回答by castors33
It tried this :
它试过这个：
QProgressBar {
border: 2px solid grey;
border-radius: 5px;
background-color: #FF0000;
}
QProgressBar::chunk {
background-color: #05B8CC;
width: 20px;
}
as styleSheet for the progressBar and I got this
作为进度条的样式表，我得到了这个
so it is easy to change the background of the bar to the color you want and you can display a text by yourself with setFormat(). Is it working for you?
因此很容易将栏的背景更改为您想要的颜色，并且您可以使用setFormat(). 它对你有用吗？
回答by Arwen
I had this problem too, but I find a way, with the help of this site: http://thesmithfam.org/blog/2009/10/13/cool-qprogressbar-stylesheet/
我也有这个问题，但我找到了一个方法，在这个网站的帮助下：http: //thesmithfam.org/blog/2009/10/13/cool-qprogressbar-stylesheet/
but I just wanted to change the color and not the progressbar itself. so I got rid of the first line, and change the second one a little bit.
但我只是想改变颜色而不是进度条本身。所以我去掉了第一行，并稍微改变了第二行。
Finally I got what I wanted.
最后我得到了我想要的。
First do this:
首先这样做：
QString danger = "QProgressBar::chunk {background: QLinearGradient( x1: 0, y1: 0, x2: 1, y2: 0,stop: 0 #FF0350,stop: 0.4999 #FF0020,stop: 0.5 #FF0019,stop: 1 #FF0000 );border-bottom-right-radius: 5px;border-bottom-left-radius: 5px;border: .px solid black;}";
QString safe= "QProgressBar::chunk {background: QLinearGradient( x1: 0, y1: 0, x2: 1, y2: 0,stop: 0 #78d,stop: 0.4999 #46a,stop: 0.5 #45a,stop: 1 #238 );border-bottom-right-radius: 7px;border-bottom-left-radius: 7px;border: 1px solid black;}";
Now all you have to do is:
现在你所要做的就是：
if(ui->progressbar->value()<80)
ui->progressbar->setStyleSheet(danger);
else
ui->progressbar->setStyleSheet(safe);
回答by user1894812
Using the "Highlight" color role does the trick in my case (using Plastique style).
在我的情况下，使用“突出显示”颜色角色可以解决问题（使用 Plastique 风格）。
QPalette p = palette();
p.setColor(QPalette::Highlight, Qt::green);
setPalette(p);
