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  4. Refresh a form in C++ Builder

Refresh a form in C++ Builder

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  • D David Crow

    David21u2 wrote:

    I would really apreciate if someone could tell me how to keep the forms updated when it is running...

    How did you initially populate them?

    "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

    "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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    David21u2
    wrote on last edited by
    #3

    Hi, Thanks a lot for your help... My issue is the following...when I'm running the .exe file... any further action I do with the mouse, lets say open another application or even click over my application cause that the screen gets frozen...i've added refresh() and Bringtofront() methods but they only work whether I run the application from the Builder IDE... tks in advance for your help... dg

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    • D David21u2

      Hi, Thanks a lot for your help... My issue is the following...when I'm running the .exe file... any further action I do with the mouse, lets say open another application or even click over my application cause that the screen gets frozen...i've added refresh() and Bringtofront() methods but they only work whether I run the application from the Builder IDE... tks in advance for your help... dg

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      David Crow
      wrote on last edited by
      #4

      David21u2 wrote:

      ...cause that the screen gets frozen...

      Instead of what? Is your application doing something at that point?

      "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

      "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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      • D David Crow

        David21u2 wrote:

        ...cause that the screen gets frozen...

        Instead of what? Is your application doing something at that point?

        "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

        "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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        David21u2
        wrote on last edited by
        #5

        Yeah, The application is a cellular networks simulator; some simulations are really heavy computationally speaking that the system I think is unable to refresh the graphical interface...but the curious thing is that only the app's screen gets frozen because the simulation itself keeps working properly; I've verified it because once the overall simulation process finishes then the application screen returns. I've viewed some articles refering to threads but I have no idea how to use them...maybe there is another way !! c u, dg

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        • D David21u2

          Yeah, The application is a cellular networks simulator; some simulations are really heavy computationally speaking that the system I think is unable to refresh the graphical interface...but the curious thing is that only the app's screen gets frozen because the simulation itself keeps working properly; I've verified it because once the overall simulation process finishes then the application screen returns. I've viewed some articles refering to threads but I have no idea how to use them...maybe there is another way !! c u, dg

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          David Crow
          wrote on last edited by
          #6

          David21u2 wrote:

          ...some simulations are really heavy computationally speaking that the system I think is unable to refresh the graphical interface...I've verified it because once the overall simulation process finishes then the application screen returns.

          Put these computations into a worker thread.

          "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

          "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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          • D David Crow

            David21u2 wrote:

            ...some simulations are really heavy computationally speaking that the system I think is unable to refresh the graphical interface...I've verified it because once the overall simulation process finishes then the application screen returns.

            Put these computations into a worker thread.

            "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

            "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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            David21u2
            wrote on last edited by
            #7

            well, could you give me please additional insight how to do that...i've never use such threads so a tutorial or maybe a sample file could be useful... : ) tks dg

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            • D David21u2

              well, could you give me please additional insight how to do that...i've never use such threads so a tutorial or maybe a sample file could be useful... : ) tks dg

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              David Crow
              wrote on last edited by
              #8

              See here.

              "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

              "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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              • D David Crow

                See here.

                "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

                "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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                David Gonzalez G
                wrote on last edited by
                #9

                tks a lot for your help...I'm gonna go over that inmediately... c u around.. dg

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                • D David21u2

                  Hi, Thanks a lot for your help... My issue is the following...when I'm running the .exe file... any further action I do with the mouse, lets say open another application or even click over my application cause that the screen gets frozen...i've added refresh() and Bringtofront() methods but they only work whether I run the application from the Builder IDE... tks in advance for your help... dg

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                  favorxx
                  wrote on last edited by
                  #10

                  maybe your frequent refresh leads to the frosen, try to create a thread to refresh :)

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                  • F favorxx

                    maybe your frequent refresh leads to the frosen, try to create a thread to refresh :)

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                    David Gonzalez G
                    wrote on last edited by
                    #11

                    hi, do ou have a sample code showing how to do that... I've never used threads and I found it a bit complicated... well, tks a lot for your help... c u around, dg

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                    • D David Gonzalez G

                      hi, do ou have a sample code showing how to do that... I've never used threads and I found it a bit complicated... well, tks a lot for your help... c u around, dg

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                      favorxx
                      wrote on last edited by
                      #12

                      Multithreading Tutorial[^] you can download the code here,although it isn't in c++ builder. It is written by api, hope it helpful. anyway, i think the code in msdn is also valuable.

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                      • F favorxx

                        Multithreading Tutorial[^] you can download the code here,although it isn't in c++ builder. It is written by api, hope it helpful. anyway, i think the code in msdn is also valuable.

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                        favorxx
                        wrote on last edited by
                        #13

                        another good article for you Threads with MFC[^]

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                        • F favorxx

                          another good article for you Threads with MFC[^]

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                          David Gonzalez G
                          wrote on last edited by
                          #14

                          Hi, I dont know whether there are some issues implementing threads by means of MFC in Borland C++ Builder. I have found some problems with CWinThread class in Builder... have you some additional comments regarding it ? tks a lot for your help...

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                          • D David Gonzalez G

                            Hi, I dont know whether there are some issues implementing threads by means of MFC in Borland C++ Builder. I have found some problems with CWinThread class in Builder... have you some additional comments regarding it ? tks a lot for your help...

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                            favorxx
                            wrote on last edited by
                            #15

                            MFC is a part of Visual C++, not for C++ builder, maybe the idea is useful. If you do not want to use api or read codes in visual c++, please use TThread in c++ builder. there is an example contained in c++ builder D:\Program Files\Borland\CBuilder6\Examples\Apps\Threads you can file->new->others->thread object to create a new thread, See more in help file of TThread

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