No percentage label on QProgressBar when switching to vertical

[hkottmann]

I need to have a QProgressBar that is vertically aligned to show the visually the content of a solution container. When I align the QProgressBar horizontally I have the label visible that shows the percentage, when I align the QProgressBar vertically the label with the percentage is not visible anymore.

[SGaist]

Hi and welcome to devnet,

What version of Qt ?
On what platform ?

Please provide a minimal compilable example that shows the behaviour.

[hkottmann]

Hi, thank you for your answer, it's QT 5.14.1 on Windows, is there a way to upload the *.ui-File in this forum?

[JonB]

@hkottmann
No. Paste into a reply (preferably enclosed in Code tags), or you have to upload somewhere public and give a link.

[hkottmann]

Look like this is still this old unresolved bug:

https://bugreports.qt.io/browse/QTBUG-31385?focusedCommentId=304710&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel

The problem is the same in Windows and Linux, here the screenshot of a widget with a horizontal and a vertical QProgressBar with the same settings (except the orientation):


Here the code of the *.ui file:

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>373</width>
    <height>465</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QGridLayout" name="gridLayout_2">
    <item row="0" column="0">
     <layout class="QGridLayout" name="gridLayout">
      <item row="0" column="0">
       <widget class="QProgressBar" name="progressBar">
        <property name="value">
         <number>24</number>
        </property>
       </widget>
      </item>
      <item row="0" column="1">
       <widget class="QProgressBar" name="progressBar_2">
        <property name="value">
         <number>24</number>
        </property>
        <property name="orientation">
         <enum>Qt::Vertical</enum>
        </property>
       </widget>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>373</width>
     <height>30</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>

[mrjj]

Hi
Seems like the bug is still around
Win 10. Qt 5.14.1

[SGaist]

Since you have them, would either of you please update that report with a minimal compilable example ?

[mrjj]

@SGaist
I added a comment with reference to this thread. ( with how to reproduce )
Hope that is fine.

[mrjj]

Hi
A fix could be using a QProxyStyle
(fast made, give it more love if used for real)
set with
ui->progressBar->setStyle( new Progressproxy );

class Progressproxy : public QProxyStyle
{

public:
    Progressproxy() : QProxyStyle() {}
public:
    virtual void drawControl(ControlElement element, const QStyleOption *opt, QPainter *p,
                             const QWidget *w) const override
    {

        if (element == CE_ProgressBarLabel) {
            const QStyleOptionProgressBar *real  = qstyleoption_cast<const QStyleOptionProgressBar *>(opt);
            // check real is not null...
            QStyleOptionProgressBar pb = *real;
            pb.rect = QRect(0, 0, w->width(), w->height());
            proxy()->drawItemText(p, pb.rect, Qt::AlignCenter, pb.palette,
                                  pb.state & State_Enabled, pb.text, QPalette::Text);
            return;
        }

        QProxyStyle::drawControl(element, opt, p, w);

    }
};

But to have it reserve space in the button of the bar like on horizontal, it seems one has to handle
all CE_ProgressBarXXX elements and reduce the rect (clientArea)
as the space used for the text seems not included when vertical.
(it uses the full widget area)

[hkottmann]

Hi mrjj

Nice hack, this enabled me also to display the percentage value as double value, thank you

[mrjj]

@hkottmann
Hi
Well, that sounds good as i was not sure having the value center would be ok since its normally at the end,
and if you can tweak it for something you wanted, its a win.
Also, its a small hack and while i didn't test it, it should also respond
as expected on other properties (like disabled etc) since im
using the normal draw functions.