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No fill option in QColorDialog

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  • Q Offline
    Q Offline
    Qt Enthusiast
    wrote on last edited by A Former User
    #1

    Hi all
    I am using a QColorDialog box . Can I enhance the existing qcolordialog to have no fill option . That means when the user selects the no fill option (as we have in Microsoft ppt) , and if a box is filled then it should be cleared
    and can some one suggest me no fill option

    raven-worxR 1 Reply Last reply
    0
    • Q Qt Enthusiast

      Hi all
      I am using a QColorDialog box . Can I enhance the existing qcolordialog to have no fill option . That means when the user selects the no fill option (as we have in Microsoft ppt) , and if a box is filled then it should be cleared
      and can some one suggest me no fill option

      raven-worxR Offline
      raven-worxR Offline
      raven-worx
      Moderators
      wrote on last edited by raven-worx
      #2

      @Qt-Enthusiast
      sorry - but at least to me - its absolutely not clear what you mean.
      Anyway, you only have the provided API. The only thing is that you can install event filter on the dialogs children. But their classes are all not public, so not much you can do there.

      --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
      If you have a question please use the forum so others can benefit from the solution in the future

      mrjjM 1 Reply Last reply
      0
      • raven-worxR raven-worx

        @Qt-Enthusiast
        sorry - but at least to me - its absolutely not clear what you mean.
        Anyway, you only have the provided API. The only thing is that you can install event filter on the dialogs children. But their classes are all not public, so not much you can do there.

        mrjjM Offline
        mrjjM Offline
        mrjj
        Lifetime Qt Champion
        wrote on last edited by
        #3

        @raven-worx

        I have the same feeling. :)

        I think it means a no color option.
        Instead of clicking on say red, and
        get red fill you can select empty area ( a non color) and
        get none, meaning if u had a color before, its now cleared.

        raven-worxR 1 Reply Last reply
        0
        • mrjjM mrjj

          @raven-worx

          I have the same feeling. :)

          I think it means a no color option.
          Instead of clicking on say red, and
          get red fill you can select empty area ( a non color) and
          get none, meaning if u had a color before, its now cleared.

          raven-worxR Offline
          raven-worxR Offline
          raven-worx
          Moderators
          wrote on last edited by
          #4

          @mrjj
          and how is it possible to click on no color?

          --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
          If you have a question please use the forum so others can benefit from the solution in the future

          mrjjM 1 Reply Last reply
          0
          • raven-worxR raven-worx

            @mrjj
            and how is it possible to click on no color?

            mrjjM Offline
            mrjjM Offline
            mrjj
            Lifetime Qt Champion
            wrote on last edited by mrjj
            #5

            @raven-worx
            In paint programs its often shown as clear box with cross over.
            with the other colors. And left click clears pen color and right click clear fill color.
            (tried to find image)

            :)
            (edit)
            In power point its a button

            raven-worxR 1 Reply Last reply
            1
            • Q Offline
              Q Offline
              Qt Enthusiast
              wrote on last edited by
              #6

              When I click on the empty boxes in Custom color . it is changing to white . Am I missing something

              mrjjM 1 Reply Last reply
              0
              • mrjjM mrjj

                @raven-worx
                In paint programs its often shown as clear box with cross over.
                with the other colors. And left click clears pen color and right click clear fill color.
                (tried to find image)

                :)
                (edit)
                In power point its a button

                raven-worxR Offline
                raven-worxR Offline
                raven-worx
                Moderators
                wrote on last edited by
                #7

                @mrjj
                ok, so meaning transparency?

                This should be somewhat possible with:

                colorDialog->setOption( QColorDialog::ShowAlphaChannel, true );
                

                --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
                If you have a question please use the forum so others can benefit from the solution in the future

                mrjjM 1 Reply Last reply
                1
                • raven-worxR raven-worx

                  @mrjj
                  ok, so meaning transparency?

                  This should be somewhat possible with:

                  colorDialog->setOption( QColorDialog::ShowAlphaChannel, true );
                  
                  mrjjM Offline
                  mrjjM Offline
                  mrjj
                  Lifetime Qt Champion
                  wrote on last edited by mrjj
                  #8

                  @raven-worx
                  No, it means set to no color.
                  Like if for painter, then clear the fill color so it dont fill. ( is my guess :)

                  raven-worxR 1 Reply Last reply
                  0
                  • Q Offline
                    Q Offline
                    Qt Enthusiast
                    wrote on last edited by
                    #9

                    if i have square in QGraphicsView and if I use this no color , the fill color of box should be set to its background just like clearing the box color fill color . Am I clear or shall I send a image for the same

                    1 Reply Last reply
                    0
                    • Q Qt Enthusiast

                      When I click on the empty boxes in Custom color . it is changing to white . Am I missing something

                      mrjjM Offline
                      mrjjM Offline
                      mrjj
                      Lifetime Qt Champion
                      wrote on last edited by
                      #10

                      @Qt-Enthusiast
                      Those white colors are custom colors :)
                      Its not for no color.

                      1 Reply Last reply
                      0
                      • mrjjM mrjj

                        @raven-worx
                        No, it means set to no color.
                        Like if for painter, then clear the fill color so it dont fill. ( is my guess :)

                        raven-worxR Offline
                        raven-worxR Offline
                        raven-worx
                        Moderators
                        wrote on last edited by
                        #11

                        @mrjj
                        and whats the difference between "no fill" and "transparancy" then?!

                        --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
                        If you have a question please use the forum so others can benefit from the solution in the future

                        mrjjM 1 Reply Last reply
                        1
                        • raven-worxR raven-worx

                          @mrjj
                          and whats the difference between "no fill" and "transparancy" then?!

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

                          @raven-worx
                          You are right,
                          its should give same effect ?

                          But im not sure user will intuitively think, "ahh
                          if i lower Alpha to zero, it get rid of fill" :)

                          1 Reply Last reply
                          0
                          • Q Offline
                            Q Offline
                            Qt Enthusiast
                            wrote on last edited by
                            #13

                            Can someone write the code

                            mrjjM 1 Reply Last reply
                            0
                            • Q Qt Enthusiast

                              Can someone write the code

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

                              @Qt-Enthusiast
                              Hi
                              @raven-worx showed you what to add to your color dialog.
                              colorDialog->setOption( QColorDialog::ShowAlphaChannel, true );
                              Then you get Alpha value.
                              User can set to zero and you get a transparent color which should look the same as no color.

                              1 Reply Last reply
                              0
                              • Q Offline
                                Q Offline
                                Qt Enthusiast
                                wrote on last edited by
                                #15

                                This is my code
                                can some one guide me how to do it here

                                connect(this, SIGNAL(clicked(const QModelIndex&)), this, SLOT(clickedActivated(const QModelIndex&)));
                                }

                                void myView::clickedActivated(const QModelIndex& index)
                                {
                                if (index.column() == 1 ) {
                                QColorDialog* colorDialog = new QColorDialog;
                                colorDialog->setOption(QColorDialog::ShowAlphaChannel, true );
                                QColor color = QColorDialog::getColor();
                                d_model->setData(index,color,Qt::DecorationRole);

                                }

                                as I am getting compiltation error

                                raven-worxR 1 Reply Last reply
                                0
                                • Q Qt Enthusiast

                                  This is my code
                                  can some one guide me how to do it here

                                  connect(this, SIGNAL(clicked(const QModelIndex&)), this, SLOT(clickedActivated(const QModelIndex&)));
                                  }

                                  void myView::clickedActivated(const QModelIndex& index)
                                  {
                                  if (index.column() == 1 ) {
                                  QColorDialog* colorDialog = new QColorDialog;
                                  colorDialog->setOption(QColorDialog::ShowAlphaChannel, true );
                                  QColor color = QColorDialog::getColor();
                                  d_model->setData(index,color,Qt::DecorationRole);

                                  }

                                  as I am getting compiltation error

                                  raven-worxR Offline
                                  raven-worxR Offline
                                  raven-worx
                                  Moderators
                                  wrote on last edited by
                                  #16

                                  @Qt-Enthusiast

                                  QColorDialog colorDialog;
                                  colorDialog.setOption(QColorDialog::ShowAlphaChannel, true );
                                  colorDialog.exec();
                                  QColor color = colorDialog.getColor();
                                  if( color.isValid() )
                                     d_model->setData(index,color,Qt::DecorationRole);
                                  

                                  --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
                                  If you have a question please use the forum so others can benefit from the solution in the future

                                  1 Reply Last reply
                                  2
                                  • Q Offline
                                    Q Offline
                                    Qt Enthusiast
                                    wrote on last edited by
                                    #17

                                    I am using qt.4.3.3 I am getting following compliation error

                                    error: ?class QColorDialog? has no member named ?setOption?
                                    colorDialog.setOption(QColorDialog::ShowAlphaChannel, true );
                                    error: ?ShowAlphaChannel? is not a member of ?QColorDialog?
                                    colorDialog.setOption(QColorDialog::ShowAlphaChannel, true );

                                    my code is

                                    void myInstView::clickedActivated(const QModelIndex& index)
                                    {
                                    if (index.column() == 1 ) {
                                    QColorDialog colorDialog;
                                    colorDialog.setOption(QColorDialog::ShowAlphaChannel, true );
                                    colorDialog.exec();
                                    QColor color = colorDialog.getColor();
                                    if( color.isValid() )
                                    model->setData(index,color,Qt::DecorationRole);
                                    }

                                    }
                                    }

                                    raven-worxR 1 Reply Last reply
                                    0
                                    • Q Qt Enthusiast

                                      I am using qt.4.3.3 I am getting following compliation error

                                      error: ?class QColorDialog? has no member named ?setOption?
                                      colorDialog.setOption(QColorDialog::ShowAlphaChannel, true );
                                      error: ?ShowAlphaChannel? is not a member of ?QColorDialog?
                                      colorDialog.setOption(QColorDialog::ShowAlphaChannel, true );

                                      my code is

                                      void myInstView::clickedActivated(const QModelIndex& index)
                                      {
                                      if (index.column() == 1 ) {
                                      QColorDialog colorDialog;
                                      colorDialog.setOption(QColorDialog::ShowAlphaChannel, true );
                                      colorDialog.exec();
                                      QColor color = colorDialog.getColor();
                                      if( color.isValid() )
                                      model->setData(index,color,Qt::DecorationRole);
                                      }

                                      }
                                      }

                                      raven-worxR Offline
                                      raven-worxR Offline
                                      raven-worx
                                      Moderators
                                      wrote on last edited by
                                      #18

                                      @Qt-Enthusiast
                                      it seems it is only available since Qt 4.5

                                      --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
                                      If you have a question please use the forum so others can benefit from the solution in the future

                                      1 Reply Last reply
                                      2
                                      • Q Offline
                                        Q Offline
                                        Qt Enthusiast
                                        wrote on last edited by
                                        #19

                                        Can there be any alternative to it

                                        mrjjM 1 Reply Last reply
                                        0
                                        • Q Qt Enthusiast

                                          Can there be any alternative to it

                                          mrjjM Offline
                                          mrjjM Offline
                                          mrjj
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #20

                                          @Qt-Enthusiast
                                          Nope.
                                          Fast way is to make new button or menu
                                          that clear the color on the selected item.

                                          1 Reply Last reply
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