Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. Mobile and Embedded
  4. How to setBottomWidget insteads of setCentralWidget? and color? (solved)
Forum Updated to NodeBB v4.3 + New Features

How to setBottomWidget insteads of setCentralWidget? and color? (solved)

Scheduled Pinned Locked Moved Mobile and Embedded
26 Posts 3 Posters 7.6k Views 1 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #7

    Ok, you don't need a QLabel, just put your pTicker directly at the right place

    Interested in AI ? www.idiap.ch
    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

    1 Reply Last reply
    0
    • H Offline
      H Offline
      houmingc
      wrote on last edited by
      #8

      How to put pTicker at the right place?
      i putting it using QMainWindow::setcentralWidget(pTicker);

      I tried QToolbar *fontToolBar= new QToolBar(tr("Font");
      fontToolBar->setObjectName("FontToolBar");
      fontToolBar->addWidget(pTicker);
      not successful.

      I tried QLabel *bannerLabel=new QLabel(pTicker);
      bannerLabel->setAlignment(Qt::AlignVCenter);
      It works, but no matter setting AlignHCenter or AlignBaseline or other alignment, it is fixes to the top left.

      Thanks for the good deeds, promise to pass it around.

      1 Reply Last reply
      0
      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #9

        [quote author="houmingc" date="1414852099"]
        I tried
        @QToolbar *fontToolBar= new QToolBar(tr("Font");
        fontToolBar->setObjectName("FontToolBar");
        fontToolBar->addWidget(pTicker);
        @
        not successful.
        [/quote]
        What do you mean by not successful ?

        [quote author="houmingc" date="1414852099"]
        I tried
        @
        QLabel *bannerLabel=new QLabel(pTicker);
        bannerLabel->setAlignment(Qt::AlignVCenter);
        @
        It works, but no matter setting AlignHCenter or AlignBaseline or other alignment, it is fixes to the top left.
        [/quote]

        That's normal, you are telling QLabel to align it's content that way. However bannerLabel doesn't have any content. You just made it a child of pTicker.

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

        1 Reply Last reply
        0
        • H Offline
          H Offline
          houmingc
          wrote on last edited by
          #10

          How to set it to scroll at the bottom of the dialog box

          1 Reply Last reply
          0
          • H Offline
            H Offline
            houmingc
            wrote on last edited by
            #11

            i need the code urgently, please help.

            1 Reply Last reply
            0
            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #12

              At the bottom of a QDialog ? You can use a QVBoxLayout

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

              1 Reply Last reply
              0
              • H Offline
                H Offline
                houmingc
                wrote on last edited by
                #13

                how to create multiple instances of this ticker

                1 Reply Last reply
                0
                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #14

                  The same way you create multiple instances of any other classes in C++

                  Interested in AI ? www.idiap.ch
                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                  1 Reply Last reply
                  0
                  • H Offline
                    H Offline
                    houmingc
                    wrote on last edited by
                    #15

                    My objective is to get a scrolling text below the Main Window dialog box. Below is my code, implementing QVBoxLayout, nothing is change, please give some more advice. Thanks

                    Ticker* pTicker = new Ticker(this);
                    pTicker->setText("  I love u but u love me not     ");
                    QMainWindow::setCentralWidget(pTicker);
                    QVBoxLayout *vbox=new QVBoxLayout(this);
                    vbox->addWidget(pTicker);
                    
                    QPalette pal=palette();
                    pal.setColor(QPalette::Background,Qt::green);
                    setPalette(pal);
                    setAutoFillBackground(true);
                    
                    1 Reply Last reply
                    0
                    • H Offline
                      H Offline
                      houmingc
                      wrote on last edited by
                      #16

                      My objective is to get a scrolling text below the Main Window dialog box. Below is my code, implementing QVBoxLayout, nothing is change, please give some more advice. Thanks

                      Ticker* pTicker = new Ticker(this);
                      
                      pTicker->setText("  I love u but u love me not     ");
                      
                      QMainWindow::setCentralWidget(pTicker);
                      
                      QVBoxLayout *vbox=new QVBoxLayout(this);
                      
                      vbox->addWidget(pTicker);
                      
                      QPalette pal=palette();
                      
                      pal.setColor(QPalette::Background,Qt::green);
                      
                      setPalette(pal);
                      
                      setAutoFillBackground(true);
                      
                      1 Reply Last reply
                      0
                      • IamSumitI Offline
                        IamSumitI Offline
                        IamSumit
                        wrote on last edited by
                        #17

                        Hii.

                        You can take some referance from the following link for scrolling the text.
                        "here":http://stackoverflow.com/questions/12159443/qt-scrolling-the-text-in-qwidget

                        Be Cute

                        1 Reply Last reply
                        0
                        • H Offline
                          H Offline
                          houmingc
                          wrote on last edited by
                          #18

                          I added cpp and header file to my added class.
                          Compile successfully, created the object successfully
                          When i build and run the program, other than the mainwindow, no text appear and scrolling.

                          I went into below site. there is a zip file but i can't download, i have feedback to the administrator for months and there isn't any progress. Please help. Did i miss anything. it seems i am getting near to the answer.
                          http://www.qtcentre.org/threads/24712-Marquee-QLabel

                          1 Reply Last reply
                          0
                          • SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #19

                            [quote author="houmingc" date="1415239854"]My objective is to get a scrolling text below the Main Window dialog box. Below is my code, implementing QVBoxLayout, nothing is change, please give some more advice. Thanks
                            @
                            Ticker* pTicker = new Ticker(this);

                            pTicker->setText("  I love u but u love me not     ");
                            
                            QMainWindow::setCentralWidget(pTicker);
                            
                            QVBoxLayout *vbox=new QVBoxLayout(this);
                            
                            vbox->addWidget(pTicker);
                            
                            QPalette pal=palette();
                            
                            pal.setColor(QPalette::Background,Qt::green);
                            
                            setPalette(pal);
                            
                            setAutoFillBackground(true);
                            

                            @
                            [/quote]

                            You are setting pTicker as central widget, then you are setting a QVBoxLayout on your MainWindow which will fail since QMainWindow already has a layout.

                            So all in all, if you want your pTicker at the bottom in your QMainWindow centralWidget, then put in on the bottom of a widget that you will set as central widget.

                            Interested in AI ? www.idiap.ch
                            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                            1 Reply Last reply
                            0
                            • H Offline
                              H Offline
                              houmingc
                              wrote on last edited by
                              #20

                              Dear sir, i commented out setCentrealWidget, still not working.

                              QLayout: Attempting to add QLayout "" to MainWindow "MainWindow", which already has a layout
                              QWidget::setLayout: Attempting to set QLayout "" on MainWindow "MainWindow", which already has a layout

                              Ticker* pTicker = new Ticker(this);
                              pTicker->setText("  I love u but u love me not     ");
                              QLineEdit *lineEdit =new QLineEdit;
                              //QMainWindow::setCentralWidget(pTicker);
                              QVBoxLayout *vbox=new QVBoxLayout(this);
                              vbox->addWidget(lineEdit);
                              vbox->addWidget(pTicker);
                              setLayout(vbox);
                              
                              1 Reply Last reply
                              0
                              • H Offline
                                H Offline
                                houmingc
                                wrote on last edited by
                                #21

                                Is there other container that i can use other than QVBoxLayout.
                                what does showEvent and hideEvent do exactly in ticker.cpp?

                                can give more guidance for this problem?

                                1 Reply Last reply
                                0
                                • SGaistS Offline
                                  SGaistS Offline
                                  SGaist
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #22

                                  To work with QMainWindow's central widget you have to create a container widget and work on it. I already wrote that setting a layout on a QMainWindow will fail since it already has one.

                                  @
                                  QWidget *containerWidget = new QWidget;
                                  QVBoxLayout *layout = new QVBoxLayout(containerWidget);
                                  layout->addStretch(1);
                                  layout->addWidget(pTicker);
                                  setCentralWidget(containerWidget);
                                  @

                                  "QMainWindow":http://qt-project.org/doc/qt-5/qmainwindow.html#qt-main-window-framework

                                  Interested in AI ? www.idiap.ch
                                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                  1 Reply Last reply
                                  0
                                  • H Offline
                                    H Offline
                                    houmingc
                                    wrote on last edited by
                                    #23

                                    --How to remove former layout---

                                    under ui->setupUi(this);
                                    I inserted: delete layout();

                                    before adding your code. No progress.

                                    1 Reply Last reply
                                    0
                                    • SGaistS Offline
                                      SGaistS Offline
                                      SGaist
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #24

                                      Again: stop trying to put your own layout in QMainWindow, it's not meant for that.

                                      Interested in AI ? www.idiap.ch
                                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                      1 Reply Last reply
                                      0
                                      • H Offline
                                        H Offline
                                        houmingc
                                        wrote on last edited by
                                        #25

                                        deleted mainwindow source file.
                                        Insert above code into main instead.
                                        compiler complain setCentralWidget was not declared in this scope.

                                        1 Reply Last reply
                                        0
                                        • SGaistS Offline
                                          SGaistS Offline
                                          SGaist
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #26

                                          Sure it's not, it's meant to be used in a QMainWindow subclass constructor

                                          Interested in AI ? www.idiap.ch
                                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                          1 Reply Last reply
                                          0

                                          • Login

                                          • Login or register to search.
                                          • First post
                                            Last post
                                          0
                                          • Categories
                                          • Recent
                                          • Tags
                                          • Popular
                                          • Users
                                          • Groups
                                          • Search
                                          • Get Qt Extensions
                                          • Unsolved