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How to update entire window on change in QProxyStyle?

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qproxystyleqpushbuttonqwidgetpainting issues
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  • mrjjM mrjj

    @CJha

    Hi
    Ok. that is odd since it will resize when clicked. updateGeometry() should make layout recalc.

    Is the proxy complete so I can just add 3 buttons to a layout and see myself ?

    CJhaC Offline
    CJhaC Offline
    CJha
    wrote on last edited by
    #5

    @mrjj Yes, it is complete. You just have to include the relevant files.

    mrjjM 1 Reply Last reply
    1
    • CJhaC CJha

      @mrjj Yes, it is complete. You just have to include the relevant files.

      mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by
      #6

      @CJha

      hi
      I cannot make it scale/update at all.

      What type of layout did you use ?

      CJhaC 1 Reply Last reply
      0
      • mrjjM mrjj

        @CJha

        hi
        I cannot make it scale/update at all.

        What type of layout did you use ?

        CJhaC Offline
        CJhaC Offline
        CJha
        wrote on last edited by CJha
        #7

        @mrjj Hi, that is strange. I used a normal layout in Qt Designer. Here is an image:

        LayoutReq.PNG

        I didn't change anything about the layout, I just put it there and that is all.

        mrjjM 1 Reply Last reply
        0
        • CJhaC CJha

          @mrjj Hi, that is strange. I used a normal layout in Qt Designer. Here is an image:

          LayoutReq.PNG

          I didn't change anything about the layout, I just put it there and that is all.

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by mrjj
          #8

          @CJha
          and buttons have default sizePolizy ?

          Could you post the UI file content ?

          mrjjM CJhaC 2 Replies Last reply
          0
          • mrjjM mrjj

            @CJha
            and buttons have default sizePolizy ?

            Could you post the UI file content ?

            mrjjM Offline
            mrjjM Offline
            mrjj
            Lifetime Qt Champion
            wrote on last edited by
            #9

            @mrjj

            Ok, got it now.

            CJhaC 1 Reply Last reply
            1
            • mrjjM mrjj

              @CJha
              and buttons have default sizePolizy ?

              Could you post the UI file content ?

              CJhaC Offline
              CJhaC Offline
              CJha
              wrote on last edited by
              #10

              @mrjj Yes, the sizePolicy, min and max size, etc is all default. All I did was change the text on the buttons.

              Here is the UI file content:

              /********************************************************************************
              ** Form generated from reading UI file 'mainwindowggYFGS.ui'
              **
              ** Created by: Qt User Interface Compiler version 5.15.2
              **
              ** WARNING! All changes made in this file will be lost when recompiling UI file!
              ********************************************************************************/
              
              #ifndef MAINWINDOWGGYFGS_H
              #define MAINWINDOWGGYFGS_H
              
              #include <QtCore/QVariant>
              #include <QtWidgets/QApplication>
              #include <QtWidgets/QHBoxLayout>
              #include <QtWidgets/QLabel>
              #include <QtWidgets/QMainWindow>
              #include <QtWidgets/QPushButton>
              #include <QtWidgets/QSpacerItem>
              #include <QtWidgets/QSpinBox>
              #include <QtWidgets/QVBoxLayout>
              #include <QtWidgets/QWidget>
              
              QT_BEGIN_NAMESPACE
              
              class Ui_MainWindowClass
              {
              public:
                  QWidget *centralWidget;
                  QVBoxLayout *verticalLayout;
                  QHBoxLayout *horizontalLayout;
                  QLabel *label;
                  QSpinBox *btnBorder_spin;
                  QSpacerItem *horizontalSpacer;
                  QHBoxLayout *horizontalLayout_2;
                  QPushButton *btn_1;
                  QSpacerItem *horizontalSpacer_2;
                  QPushButton *btn_2;
                  QSpacerItem *horizontalSpacer_3;
                  QPushButton *btn_3;
              
                  void setupUi(QMainWindow *MainWindowClass)
                  {
                      if (MainWindowClass->objectName().isEmpty())
                          MainWindowClass->setObjectName(QString::fromUtf8("MainWindowClass"));
                      MainWindowClass->resize(311, 73);
                      centralWidget = new QWidget(MainWindowClass);
                      centralWidget->setObjectName(QString::fromUtf8("centralWidget"));
                      verticalLayout = new QVBoxLayout(centralWidget);
                      verticalLayout->setSpacing(6);
                      verticalLayout->setContentsMargins(11, 11, 11, 11);
                      verticalLayout->setObjectName(QString::fromUtf8("verticalLayout"));
                      horizontalLayout = new QHBoxLayout();
                      horizontalLayout->setSpacing(6);
                      horizontalLayout->setObjectName(QString::fromUtf8("horizontalLayout"));
                      label = new QLabel(centralWidget);
                      label->setObjectName(QString::fromUtf8("label"));
              
                      horizontalLayout->addWidget(label);
              
                      btnBorder_spin = new QSpinBox(centralWidget);
                      btnBorder_spin->setObjectName(QString::fromUtf8("btnBorder_spin"));
                      btnBorder_spin->setMaximum(999);
                      btnBorder_spin->setValue(10);
              
                      horizontalLayout->addWidget(btnBorder_spin);
              
                      horizontalSpacer = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
              
                      horizontalLayout->addItem(horizontalSpacer);
              
              
                      verticalLayout->addLayout(horizontalLayout);
              
                      horizontalLayout_2 = new QHBoxLayout();
                      horizontalLayout_2->setSpacing(6);
                      horizontalLayout_2->setObjectName(QString::fromUtf8("horizontalLayout_2"));
                      btn_1 = new QPushButton(centralWidget);
                      btn_1->setObjectName(QString::fromUtf8("btn_1"));
              
                      horizontalLayout_2->addWidget(btn_1);
              
                      horizontalSpacer_2 = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
              
                      horizontalLayout_2->addItem(horizontalSpacer_2);
              
                      btn_2 = new QPushButton(centralWidget);
                      btn_2->setObjectName(QString::fromUtf8("btn_2"));
              
                      horizontalLayout_2->addWidget(btn_2);
              
                      horizontalSpacer_3 = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
              
                      horizontalLayout_2->addItem(horizontalSpacer_3);
              
                      btn_3 = new QPushButton(centralWidget);
                      btn_3->setObjectName(QString::fromUtf8("btn_3"));
              
                      horizontalLayout_2->addWidget(btn_3);
              
              
                      verticalLayout->addLayout(horizontalLayout_2);
              
                      MainWindowClass->setCentralWidget(centralWidget);
              
                      retranslateUi(MainWindowClass);
              
                      QMetaObject::connectSlotsByName(MainWindowClass);
                  } // setupUi
              
                  void retranslateUi(QMainWindow *MainWindowClass)
                  {
                      MainWindowClass->setWindowTitle(QCoreApplication::translate("MainWindowClass", "MainWindow", nullptr));
                      label->setText(QCoreApplication::translate("MainWindowClass", "Button Side Borders:", nullptr));
                      btnBorder_spin->setSuffix(QCoreApplication::translate("MainWindowClass", " px", nullptr));
                      btn_1->setText(QCoreApplication::translate("MainWindowClass", "Button 1: 0", nullptr));
                      btn_2->setText(QCoreApplication::translate("MainWindowClass", "Button 2: 0", nullptr));
                      btn_3->setText(QCoreApplication::translate("MainWindowClass", "Button 3: Demo", nullptr));
                  } // retranslateUi
              
              };
              
              namespace Ui {
                  class MainWindowClass: public Ui_MainWindowClass {};
              } // namespace Ui
              
              QT_END_NAMESPACE
              
              #endif // MAINWINDOWGGYFGS_H
              
              1 Reply Last reply
              1
              • mrjjM mrjj

                @mrjj

                Ok, got it now.

                CJhaC Offline
                CJhaC Offline
                CJha
                wrote on last edited by
                #11

                @mrjj I found a way around, by recreating a new ProxyStyle object each time the value of minBtnBorder is changed and then applying this to the qApp.

                void MainWindow::on_btnBorder_spin_valueChanged(int val)
                {
                   minBtnBorder = val;
                   auto proxyStyle = new ProxyStyle;
                   proxyStyle->setBaseStyle(QStyleFactory::create("Fusion"));
                   qApp->setStyle(proxyStyle);
                   hide();
                   show();
                }
                

                It is a workaround at best though.

                mrjjM 1 Reply Last reply
                1
                • CJhaC CJha

                  @mrjj I found a way around, by recreating a new ProxyStyle object each time the value of minBtnBorder is changed and then applying this to the qApp.

                  void MainWindow::on_btnBorder_spin_valueChanged(int val)
                  {
                     minBtnBorder = val;
                     auto proxyStyle = new ProxyStyle;
                     proxyStyle->setBaseStyle(QStyleFactory::create("Fusion"));
                     qApp->setStyle(proxyStyle);
                     hide();
                     show();
                  }
                  

                  It is a workaround at best though.

                  mrjjM Offline
                  mrjjM Offline
                  mrjj
                  Lifetime Qt Champion
                  wrote on last edited by
                  #12

                  @CJha
                  Good. at least we have a "fix"

                  The odd thing is that setText

                  void QAbstractButton::setText(const QString &text)
                  {
                      Q_D(QAbstractButton);
                      if (d->text == text)
                          return;
                      d->text = text;
                  #ifndef QT_NO_SHORTCUT
                      QKeySequence newMnemonic = QKeySequence::mnemonic(text);
                      setShortcut(newMnemonic);
                  #endif
                      d->sizeHint = QSize();
                      update();
                      updateGeometry();
                  #ifndef QT_NO_ACCESSIBILITY
                      QAccessibleEvent event(this, QAccessible::NameChanged);
                      QAccessible::updateAccessibility(&event);
                  #endif
                  }
                  

                  just calls
                  update();
                  updateGeometry();

                  CJhaC Christian EhrlicherC 2 Replies Last reply
                  1
                  • mrjjM mrjj

                    @CJha
                    Good. at least we have a "fix"

                    The odd thing is that setText

                    void QAbstractButton::setText(const QString &text)
                    {
                        Q_D(QAbstractButton);
                        if (d->text == text)
                            return;
                        d->text = text;
                    #ifndef QT_NO_SHORTCUT
                        QKeySequence newMnemonic = QKeySequence::mnemonic(text);
                        setShortcut(newMnemonic);
                    #endif
                        d->sizeHint = QSize();
                        update();
                        updateGeometry();
                    #ifndef QT_NO_ACCESSIBILITY
                        QAccessibleEvent event(this, QAccessible::NameChanged);
                        QAccessible::updateAccessibility(&event);
                    #endif
                    }
                    

                    just calls
                    update();
                    updateGeometry();

                    CJhaC Offline
                    CJhaC Offline
                    CJha
                    wrote on last edited by
                    #13

                    @mrjj Yeah, that is very odd. Maybe something else is going on in the background that we are unable to get to!? Although, the code for setText() seems complete.

                    mrjjM 1 Reply Last reply
                    0
                    • CJhaC CJha

                      @mrjj Yeah, that is very odd. Maybe something else is going on in the background that we are unable to get to!? Although, the code for setText() seems complete.

                      mrjjM Offline
                      mrjjM Offline
                      mrjj
                      Lifetime Qt Champion
                      wrote on last edited by
                      #14

                      @CJha

                      well i think it might be related to sizeHint() but I have no proof yet :)

                      1 Reply Last reply
                      1
                      • mrjjM mrjj

                        @CJha
                        Good. at least we have a "fix"

                        The odd thing is that setText

                        void QAbstractButton::setText(const QString &text)
                        {
                            Q_D(QAbstractButton);
                            if (d->text == text)
                                return;
                            d->text = text;
                        #ifndef QT_NO_SHORTCUT
                            QKeySequence newMnemonic = QKeySequence::mnemonic(text);
                            setShortcut(newMnemonic);
                        #endif
                            d->sizeHint = QSize();
                            update();
                            updateGeometry();
                        #ifndef QT_NO_ACCESSIBILITY
                            QAccessibleEvent event(this, QAccessible::NameChanged);
                            QAccessible::updateAccessibility(&event);
                        #endif
                        }
                        

                        just calls
                        update();
                        updateGeometry();

                        Christian EhrlicherC Online
                        Christian EhrlicherC Online
                        Christian Ehrlicher
                        Lifetime Qt Champion
                        wrote on last edited by
                        #15

                        @mrjj said in How to update entire window on change in QProxyStyle?:

                        d->sizeHint = QSize();

                        I think this may be the reason. I would guess sizeFromContents() is only called when sizeHint is invalid. Simply set a breakpoint at ProxyStyle ::sizeFromContents() and take a look from where it is called (and why).

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                        mrjjM 1 Reply Last reply
                        3
                        • Christian EhrlicherC Christian Ehrlicher

                          @mrjj said in How to update entire window on change in QProxyStyle?:

                          d->sizeHint = QSize();

                          I think this may be the reason. I would guess sizeFromContents() is only called when sizeHint is invalid. Simply set a breakpoint at ProxyStyle ::sizeFromContents() and take a look from where it is called (and why).

                          mrjjM Offline
                          mrjjM Offline
                          mrjj
                          Lifetime Qt Champion
                          wrote on last edited by
                          #16

                          @Christian-Ehrlicher
                          Hi
                          Seems to call it from QPushButton::sizeHint() but I failed
                          to find way to trigger it without altering text.
                          I guess for full disclosure the source is needed and single step :9
                          I use wobog for it.

                          1 Reply Last reply
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