Update text on one form from another form
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I have a program that displays a dialog box with a series of buttons and a text box for messages. When I select one of the buttons it creates an instance of a module that interfaces to some USB tools. Sometimes the work done by this interface module can take sometime to complete and I would like the interface module to update the text box on the dialog box. Is there an easy way to do this? I am using VC++ 6.0. Eric
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I have a program that displays a dialog box with a series of buttons and a text box for messages. When I select one of the buttons it creates an instance of a module that interfaces to some USB tools. Sometimes the work done by this interface module can take sometime to complete and I would like the interface module to update the text box on the dialog box. Is there an easy way to do this? I am using VC++ 6.0. Eric
Hi, you can set a control variable associated with the control you want to update, and then access them through a pointer to the window/dialog that has the ownership of those controls. As example (In one of my programms): Form3 has some buttons (m_cbBut1, m_cbBut2) and Form2 has a graphic (m_gGraph1). In Form3 I have a pointer to the Form2 (CFormView* m_pForm2). When I use some of the buttons I put in the message OnButtonXClick something like:
OnClick ()
{
//some code
m_pForm2->m_gGraph1->Update (); //I make the update of my graphic
m_pForm2->m_cbBut1F2->ShowWindow (FALSE); //I make invisible a button near the graphic.
//some code
return;
}Greetings. -------- M.D.V. If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
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Hi, you can set a control variable associated with the control you want to update, and then access them through a pointer to the window/dialog that has the ownership of those controls. As example (In one of my programms): Form3 has some buttons (m_cbBut1, m_cbBut2) and Form2 has a graphic (m_gGraph1). In Form3 I have a pointer to the Form2 (CFormView* m_pForm2). When I use some of the buttons I put in the message OnButtonXClick something like:
OnClick ()
{
//some code
m_pForm2->m_gGraph1->Update (); //I make the update of my graphic
m_pForm2->m_cbBut1F2->ShowWindow (FALSE); //I make invisible a button near the graphic.
//some code
return;
}Greetings. -------- M.D.V. If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
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How did you arrive with m_pForm2? I am using Dialog instead of Form, would that make a difference? I can not seem to get my control variables to show up. Eric
hi, have a CClass* (of the class where u have to update) as a dialog box member. Before calling DoModal update this pointer and rest handle with the pointer. Try it.Lets see . Have a nice day
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How did you arrive with m_pForm2? I am using Dialog instead of Form, would that make a difference? I can not seem to get my control variables to show up. Eric
I have made it by using the View List of CDocument, because the form is connected to the document through a pDocTemplate. But the principe is the same. You can take a pointer to your dialog, by taking the handler of the window that contains the dialog in you OnInitDialog and recasting it to a CDialog*... Or another possibility is to use the moment you create the dialog to take the pointer. For example: //Instead of this... CDialog newDlg; int nAnswer = newDlg.DoModal (); //... // //Use this // CDialog* m_pOpenedDialog; //Variable to get the connection to the dialog CDialog* newDlg; //here send the pointer to a variable in the other window to connect with m_pOpenedDialog = newDlg; int nAnswer = newDlg->DoModal ();
Greetings. -------- M.D.V. If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
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I have made it by using the View List of CDocument, because the form is connected to the document through a pDocTemplate. But the principe is the same. You can take a pointer to your dialog, by taking the handler of the window that contains the dialog in you OnInitDialog and recasting it to a CDialog*... Or another possibility is to use the moment you create the dialog to take the pointer. For example: //Instead of this... CDialog newDlg; int nAnswer = newDlg.DoModal (); //... // //Use this // CDialog* m_pOpenedDialog; //Variable to get the connection to the dialog CDialog* newDlg; //here send the pointer to a variable in the other window to connect with m_pOpenedDialog = newDlg; int nAnswer = newDlg->DoModal ();
Greetings. -------- M.D.V. If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Maybe I am not explaining this correctly or do not not understand your solution. I will try to explain with example: When I click on a button in my main form (CUsbDlg) it run the following: void CUsbDlg::OnFormatBlock0() { CUsbIo cUsb; //Setup the usb communication (load the bix file) if(!cUsb.CommunicationSetup()) The problem is that I need cUsb to update a Static text box on the CUsbDlg form. There are items that happen within the CommunicationSetup that may take some time. I need to let the user know where we are in the process. Eric
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Maybe I am not explaining this correctly or do not not understand your solution. I will try to explain with example: When I click on a button in my main form (CUsbDlg) it run the following: void CUsbDlg::OnFormatBlock0() { CUsbIo cUsb; //Setup the usb communication (load the bix file) if(!cUsb.CommunicationSetup()) The problem is that I need cUsb to update a Static text box on the CUsbDlg form. There are items that happen within the CommunicationSetup that may take some time. I need to let the user know where we are in the process. Eric
braune wrote:
The problem is that I need cUsb to update a Static text box on the CUsbDlg form.
Ok, so what's the problem? One way to achieve what you want is to have the
CUsbIoclass post messages back toCUsbDlg. In the handler for those messages, update the static controls.
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