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How to Develop a Calendar Widget.

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  • G Offline
    G Offline
    goetz
    wrote on last edited by
    #108

    [quote author="BorahAnshuman" date="1303294092"]Hello Volker

    as per ur suggestion i hv read QPainter class in QT..as per ur discussion i hv tried this code in setting backgroundImage in a particular cell in CalenderWidget but an error occur..cn u please check the error..

    regards
    Anshuman[/quote]

    What was so unclear about my last statement?

    [quote author="Volker" date="1303212502"]
    You (in plural or singular meaning - choose whatever you want) may ask, but don't expect any further answers. I step out too.[/quote]

    Are you trying to troll me?

    http://www.catb.org/~esr/faqs/smart-questions.html

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    • B Offline
      B Offline
      BorahAnshuman
      wrote on last edited by
      #109

      hello ZapB

      Actually i inherit Qdialog and QCalenderWidget class..now when i build my app the following error ocurrs...can anyone suggest me why is occur..

      Error r....

      Rquest for member show() is ambiguous //show in main .cpp

      the code i hv wrritten is:

      @class PainterApp : public QDialog,public QCalendarWidget
      {
      Q_OBJECT

      public:
      explicit PainterApp(QWidget *parent = 0);
      ~PainterApp();

      private:
      Ui::PainterApp *ui;
      };
      @
      @void PainterApp::paintCell(QPainter * painter, const QRect & rect, const QDate & date ) const{

      QRectF target(30.0, 40.0, 80.0, 60.0);
      QRectF source(30.0, 40.0, 70.0, 40.0);
      QImage image("C:/QTWork/back-icon.png");
      
      
      painter->drawImage(target, image, source);
      ui->calendarWidget->paintCell(painter,rect,date.currentDate());
      

      }@
      with reagrds
      Anshuman

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      0
      • I Offline
        I Offline
        imrrk
        wrote on last edited by
        #110

        hello anshuman
        bq. class PainterApp : public QDialog,public QCalendarWidget

        this should in this way
        class PainterApp : public QDialog,public Ui::Dialog//name of your form..

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        • Z Offline
          Z Offline
          ZapB
          wrote on last edited by
          #111

          That's because you are trying something that is not allowed and makes no sense when you think about it. The calendar widget will be shown within a dialog. The calendar widget is not a dialog. So use composition not inheritcance for the dialog aspect.

          @
          class MyCalendarWidget : public QCalendarWidget
          {
          ...
          protected:
          virtual void paintCell(QPainter* painter, const QRectF& rect, const QDate& date)
          {
          // Do custom painting here!!! See base class for default implementation and ideas
          }
          };

          ...
          ...
          ...

          class MyDialog : public QDialog
          {
          ...
          };
          @

          Nokia Certified Qt Specialist
          Interested in hearing about Qt related work

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          • B Offline
            B Offline
            BorahAnshuman
            wrote on last edited by
            #112

            Hello ZapB

            thanks for ur reply..

            Actually when i use the code like that

            class PainterApp : public QDialog,public Ui::Dialog//name of your form..

            than error is

            // invalid use of incomplete type struct Ui::PainterApp//my form name come..

            and one more thing i hv calender widget present in QtDesigner..which means i havent create my own custom calender..

            regards
            Anshuman

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            • Z Offline
              Z Offline
              ZapB
              wrote on last edited by
              #113

              [quote author="BorahAnshuman" date="1303303682"]Hello ZapB
              and one more thing i hv calender widget present in QtDesigner..which means i havent create my own custom calender..
              [/quote]

              So do what I suggested and create one. You cannot override the paintCell() function if you do not have a sub-class of QCalendarWidget can you? This is basic C++.

              Nokia Certified Qt Specialist
              Interested in hearing about Qt related work

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              • B Offline
                B Offline
                BorahAnshuman
                wrote on last edited by
                #114

                ok ZapB I am sending my code u please check it..now no error signifies but nothing display in the cell..

                @namespace Ui {
                class PainterApp;
                }
                class MyCalendarWidget : public QCalendarWidget
                {
                private:
                Ui::PainterApp ui;
                protected:
                virtual void paintCell(QPainter
                painter, const QRectF& rect, const QDate& date);

                };
                class PainterApp : public QDialog
                {
                Q_OBJECT

                public:
                explicit PainterApp(QWidget *parent = 0);
                ~PainterApp();

                private:
                Ui::PainterApp *ui;
                private slots:

                };@

                @#include "painterapp.h"
                #include "ui_painterapp.h"

                PainterApp::PainterApp(QWidget *parent) :
                QDialog(parent),
                ui(new Ui::PainterApp)
                {
                ui->setupUi(this);

                }
                void MyCalendarWidget::paintCell(QPainter* painter, const QRectF& rect, const QDate& date)
                {

                rect(30.0, 40.0, 80.0, 60.0);
                QImage image("C:/QTWork/back-icon.png");
                
                
                painter->drawImage(rect, image, rect);
                ui->calendarWidget->paintCell(painter,rect,date.currentDate());
                

                }
                @

                regards
                Anshuman

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                • Z Offline
                  Z Offline
                  ZapB
                  wrote on last edited by
                  #115

                  A few issues for you to consider/fix:

                  Whay are your trying to change the rect passed into the paintCell() call. This is setup to tell you where to draw by the base class. Do not change it.

                  Why are you trying to include the ui for something totally unrelated into your sub-class of QCalendarWidget?

                  It seems you have no conceptual idea of how Qt widgets, dialogs, ui files etc relate to each other. I respectfully suggest that you go work through some of the many examples and tutorials shipped with Qt.

                  Nokia Certified Qt Specialist
                  Interested in hearing about Qt related work

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                  • B Offline
                    B Offline
                    BorahAnshuman
                    wrote on last edited by
                    #116

                    hi Zapb

                    Actually i am new in Qt..more ever all of other people are new in Qt..so no one was there to guide me..ok i will..if u dont mind can u sent some material regarding Qt..actually i hv go through the documentation but it difficult to understand..

                    if possible u can send me some material regarding Qt i my email address
                    borah.anshu@gmail.com

                    with regards
                    Anshuman

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                    • D Offline
                      D Offline
                      DenisKormalev
                      wrote on last edited by
                      #117

                      Qt Documentation and examples shipped with Qt are the best docs and materials for learning Qt I think.

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                      0
                      • Z Offline
                        Z Offline
                        ZapB
                        wrote on last edited by
                        #118

                        Launch the qtdemo application. Find an example that interests you. Launch it and then read the docs about it.

                        Nokia Certified Qt Specialist
                        Interested in hearing about Qt related work

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                        • Kiran KumarK Offline
                          Kiran KumarK Offline
                          Kiran Kumar
                          wrote on last edited by
                          #119

                          You can reffer to this link as an example http://doc.qt.io/qt-5/qtwidgets-widgets-calendarwidget-example.html

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