Hi,
On IupClose, we call
OleUninitialize();
CoUninitialize();
So specially CoUninitialize may affect your code.
Notice that IupOpen and IupClose were not designed for successive calls.
Usually the application calls IupOpen once at the beginning, and IupClose
once at the end.
Best,
Scuri
On Sat, Jun 25, 2016 at 6:48 PM, Ron <[email protected]> wrote:
> (I appear to be experiencing email issues with AOL mail and this list.
> So I moved to a non AOL mail account. This is a resend. My apologizes
> if this is a duplication)
>
>
> Hello,
>
> First let me say I completely new to implementing a GUI. I do have a
> learning curve ahead of me.
>
> However, I am attempting to implement a GUI as part of a DLL that is
> accessed by another application. The DLL provides access to a radio
> transceiver via an USB connection.
> This is on a Windows 10 system.
>
> Background:
> HDSDR (host application) -> DLL -> (radio transceiver (USB).
> There is a call within the DLL that requests a GUI be presented to the
> user. That GUI will provide access to the transceiver so that certain
> control parameters may be modified.
> Please see the IUP code below. It appears that when IupClose is
> called, IUP is closing the entire program and shutting down the DLL.
> This in turn stops the host application. If I simply click on the "X" to
> close the GUI window, things are fine. The GUI closes and the DLL
> remains running. But if I click on the "close" button, the DLL stops.
>
> Regards,
> Ron
>
>
> #include <windows.h>
> #include <stdlib.h>
> #include <stdio.h>
> #include <string.h>
> #include <iup.h>
> #include "extern.h"
>
> Ihandle *text, *dlg;
> static char oput[100];
>
> // Textbox key pressed callback
> static int k_any(Ihandle *self, int c)
> {
> char *lpOput = &oput[0];
> lpOput = IupGetAttribute(text, "VALUE"); // retrieve the
> whole string
> double MHz = 0;
>
> // Treat a CR as the "do it"
> if (c == K_CR)
> {
> double dval = strtod(lpOput, NULL);
> int val = (int)dval; // cast double
> value to an int
>
> if (val == 0) // if zero, send
> that as valid. (default reset)
> {
> MessageBoxA(NULL, "Value is blank or zero, assuming zero.
> (reset to default)", "Multus Calibration", MB_OK);
>
> //TODO: Write zero out
>
> return IUP_CLOSE;
> }
>
> if ((val < -255) || (val > 255))
> {
> MessageBoxA(NULL, "Value must be in the range of -255 to
> 255.", "Multus Calibration", MB_OK);
> return IUP_DEFAULT;
> }
>
> // TODO: Write value out
> MHz = (double)val;
> Multus_Set_Calibration(MHz);
> return IUP_CLOSE; // close window and get out
> }
>
> return IUP_DEFAULT;
> }
>
> // OK button callback
> int ok_cb(void)
> {
> int ret = k_any(text, K_CR); // send the textbox callback a
> CR if the button is clicked
> if (ret == IUP_CLOSE)
> {
> return IUP_CLOSE;
> }
>
> return IUP_DEFAULT;
> }
>
> // Textbox "ACTION" callback (unused)
> static int action(Ihandle *self, int c, char *after)
> {
> return c;
> }
>
>
> int gui(void)
> {
> Ihandle *ok_bt;
> int argc;
> char **argv;
>
> IupOpen(&argc, &argv);
>
> //memset(password, 0, 100);
>
> text = IupText(NULL);
> IupSetAttribute(text, "SIZE", "50x");
> IupSetCallback(text, "ACTION", (Icallback)action);
> IupSetCallback(text, "K_ANY", (Icallback)k_any);
>
> // OK button
> ok_bt = IupButton(" OK ", 0);
> IupSetCallback(ok_bt, "ACTION", (Icallback)ok_cb);
> IupSetAttribute(ok_bt, "POSITION", "20,20");
>
> // Dialog (window)
> dlg = IupDialog(IupVbox(text, ok_bt, NULL));
> IupSetAttributeHandle(dlg, "DEFAULTESC", ok_bt);
> IupSetAttribute(dlg, "TITLE", "Calibration Offset (-255 to 255)");
> IupSetAttribute(dlg, "BORDER", "NO");
> IupSetAttribute(dlg, "RESIZE", "NO");
> IupSetAttribute(dlg, "MAXBOX", "NO");
> IupSetAttribute(dlg, "MINBOX", "NO");
> IupSetAttribute(dlg, "MINBOX", "NO");
> IupSetAttribute(dlg, "MARGIN", "100x50");
> IupSetAttribute(dlg, "GAP", "10");
>
> IupShowXY(dlg, IUP_CENTER, IUP_CENTER);
> IupMainLoop(); // this blocks the thread
> returning
>
> //for (int j = 0; j < 1000; j++)
> //{
> // IupLoopStep();
> // Sleep(20);
> //}
> //IupExitLoop();
>
> IupClose();
> return 500;
>
> }
>
>
> Code snippet from main DLL:
>
> void __stdcall ShowGUI(void)
> {
> int count = 0;
> char test[10] = { 0 };
> int status = 0;
>
> _cprintf("[%d] ShowGUI Called, calling gui() \n",line_number++);
> status = gui();
> _cprintf("[%d] ShowGUI Finished, gui return status %d \n",
> line_number++,status);
> return;
>
> --
>
> 73,
> Ron / W4MMP
>
>
> --
> 73,
> Ron/W4MMP
>
>
>
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