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line thinkness

Scheduled Pinned Locked Moved C / C++ / MFC
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  • CPalliniC CPallini

    Your code is fine, I called it this way:

    case WM_PAINT:
    hdc = BeginPaint(hWnd, &ps);
    paint_line(hWnd, hdc, 0, 0, 400, 400, 5, RGB(255,0,0));
    EndPaint(hWnd, &ps);
    break;

    and got a beautiful red thick line in my window. :)

    If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
    This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
    [My articles]

    A Offline
    A Offline
    arun_pk
    wrote on last edited by
    #11

    I m working on a maintanance project which is too big. the same code which i send to you is been used in my project but its not working .is there any possiblity to set some default thickness of lines throughout the graph.i scare that like that some handling has been done .. because i even tried till 50...

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    • A arun_pk

      thanks for the reply I have tried from 0 to 50... :( but no change in the thickness.... i m plotting line in Wingdi normal graph

      C Offline
      C Offline
      Code o mat
      wrote on last edited by
      #12

      Place a breakpoint on the beginning of your paint_line method and once it gets hit, check the thickness parameter's value to see if it really is not 0 or 1.

      > The problem with computers is that they do what you tell them to do and not what you want them to do. < > Sometimes you just have to hate coding to do it well. <

      A 2 Replies Last reply
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      • E Eugen Podsypalnikov

        Could you post your calling context of the function too ? :) (it is a function that does call the paint_line(..) function)

        virtual void BeHappy() = 0;

        A Offline
        A Offline
        arun_pk
        wrote on last edited by
        #13

        inside paint line this is the portion where i create a pen hpen = CreatePen(PS_SOLID, thickness, rgb); i have tried like giving hpen = CreatePen(PS_SOLID, 0, rgb); . . . . . . . . . . . hpen = CreatePen(PS_SOLID, 50, rgb);

        E 1 Reply Last reply
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        • A arun_pk

          inside paint line this is the portion where i create a pen hpen = CreatePen(PS_SOLID, thickness, rgb); i have tried like giving hpen = CreatePen(PS_SOLID, 0, rgb); . . . . . . . . . . . hpen = CreatePen(PS_SOLID, 50, rgb);

          E Offline
          E Offline
          Eugen Podsypalnikov
          wrote on last edited by
          #14

          OK, could you try with 300 only, please ? :)

          virtual void BeHappy() = 0;

          A 1 Reply Last reply
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          • C Code o mat

            Place a breakpoint on the beginning of your paint_line method and once it gets hit, check the thickness parameter's value to see if it really is not 0 or 1.

            > The problem with computers is that they do what you tell them to do and not what you want them to do. < > Sometimes you just have to hate coding to do it well. <

            A Offline
            A Offline
            arun_pk
            wrote on last edited by
            #15

            inside paint line this is the portion where i create a pen hpen = CreatePen(PS_SOLID, thickness, rgb); i have tried like giving hpen = CreatePen(PS_SOLID, 0, rgb); . . . . . . . . . . . hpen = CreatePen(PS_SOLID, 50, rgb);

            1 Reply Last reply
            0
            • CPalliniC CPallini

              Your code is fine, I called it this way:

              case WM_PAINT:
              hdc = BeginPaint(hWnd, &ps);
              paint_line(hWnd, hdc, 0, 0, 400, 400, 5, RGB(255,0,0));
              EndPaint(hWnd, &ps);
              break;

              and got a beautiful red thick line in my window. :)

              If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
              This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
              [My articles]

              A Offline
              A Offline
              arun_pk
              wrote on last edited by
              #16

              thanks pallini it worked when i gave thickness as 300 thanks a lot for spending time for me...

              1 Reply Last reply
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              • E Eugen Podsypalnikov

                OK, could you try with 300 only, please ? :)

                virtual void BeHappy() = 0;

                A Offline
                A Offline
                arun_pk
                wrote on last edited by
                #17

                thanks Eugen its working fine thanks a lot why is it so ???

                E 1 Reply Last reply
                0
                • C Code o mat

                  Place a breakpoint on the beginning of your paint_line method and once it gets hit, check the thickness parameter's value to see if it really is not 0 or 1.

                  > The problem with computers is that they do what you tell them to do and not what you want them to do. < > Sometimes you just have to hate coding to do it well. <

                  A Offline
                  A Offline
                  arun_pk
                  wrote on last edited by
                  #18

                  it worked when i gave thickness as 300 thanks a lot for spending time for me...

                  C 1 Reply Last reply
                  0
                  • A arun_pk

                    it worked when i gave thickness as 300 thanks a lot for spending time for me...

                    C Offline
                    C Offline
                    Code o mat
                    wrote on last edited by
                    #19

                    No probs, here[^] you can find info about the mapping modes as mentioned by someone, try setting the MM_TEXT mapping mode before drawing your line and see what results that produces.

                    > The problem with computers is that they do what you tell them to do and not what you want them to do. < > Sometimes you just have to hate coding to do it well. <

                    A 1 Reply Last reply
                    0
                    • A arun_pk

                      thanks Eugen its working fine thanks a lot why is it so ???

                      E Offline
                      E Offline
                      Eugen Podsypalnikov
                      wrote on last edited by
                      #20

                      Probably a special DC Mapping Mode[^] was set in the calling context... :) (For example: Carlo Pallini has given his calling context - there are no modifications of the DC Mapping Mode there, so it is possible to "feel" the arguments by 2 or 5 too :) )

                      virtual void BeHappy() = 0;

                      A 1 Reply Last reply
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                      • E Eugen Podsypalnikov

                        Probably a special DC Mapping Mode[^] was set in the calling context... :) (For example: Carlo Pallini has given his calling context - there are no modifications of the DC Mapping Mode there, so it is possible to "feel" the arguments by 2 or 5 too :) )

                        virtual void BeHappy() = 0;

                        A Offline
                        A Offline
                        arun_pk
                        wrote on last edited by
                        #21

                        Eugon I think i need to learn About setting Modes its my pleasure to talk with you thanks a lot it really helped me arun

                        E 1 Reply Last reply
                        0
                        • C Code o mat

                          No probs, here[^] you can find info about the mapping modes as mentioned by someone, try setting the MM_TEXT mapping mode before drawing your line and see what results that produces.

                          > The problem with computers is that they do what you tell them to do and not what you want them to do. < > Sometimes you just have to hate coding to do it well. <

                          A Offline
                          A Offline
                          arun_pk
                          wrote on last edited by
                          #22

                          i m goign through the article thanks a lot

                          1 Reply Last reply
                          0
                          • A arun_pk

                            Eugon I think i need to learn About setting Modes its my pleasure to talk with you thanks a lot it really helped me arun

                            E Offline
                            E Offline
                            Eugen Podsypalnikov
                            wrote on last edited by
                            #23

                            You are welcome, Arun ! :) (please observe the function that does call paint_line(..) - maybe, there is some variable like float fZoomingFactor there, so you could call the function like paint_line(.., thickness * fZoomingFactor, ..) :) )

                            virtual void BeHappy() = 0;

                            A 1 Reply Last reply
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                            • E Eugen Podsypalnikov

                              You are welcome, Arun ! :) (please observe the function that does call paint_line(..) - maybe, there is some variable like float fZoomingFactor there, so you could call the function like paint_line(.., thickness * fZoomingFactor, ..) :) )

                              virtual void BeHappy() = 0;

                              A Offline
                              A Offline
                              arun_pk
                              wrote on last edited by
                              #24

                              yup Eugen Zooming factor is existing i am adjusting my code according to that ...

                              1 Reply Last reply
                              0
                              • A arun_pk

                                I am using pen to plot lines in graph hpen = CreatePen(PS_SOLID, thickness, rgb); even after giving the thinkness parameter as 5 . thickness of the line still remain same as if we put zero... is there any thing i m missing to add or any code or api to increase thickness of the line pls help me to come out of this mess thanks in advance............

                                R Offline
                                R Offline
                                Raj Jaiswal
                                wrote on last edited by
                                #25

                                //Create pen based on your requirement. HPEN hPen= CreatePen(PS_SOLID, thickness, RGB(0,0,0)); //Select the created pen in Device context. If you want to capture capture the old pen. Once you are //done with the drawing select the old pen back and destroy the pen you have created. HPEN hOldPen = (HPEN) SelectObject(hdc, hPen); //Do your drawing here. ... ... ... //Select the old pen back so that the newly created pen will get deselected. SelectObject(hdc, hOldPen ); //Delete the pen. DeleteObject(hpen); Use above mentioned code to draw your line with thickness.

                                Raj Jaiswal

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