Sample6: ToggleButton Widget.

The toggle-button is an on/off button, used to operate option selections. Unlike radio-buttons, toggle-buttons are never grouped, so they have always independent selection status. The activation callback acts as for the radio-button Object.
Via MTButtonActivate() and MTButtonDeactivate() it's possible to set the button activation status. 
/* C version */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "mgui.h"

#define N_TOGGLE_BUTTON 4

MOBJECT label;
int toggle_status[N_TOGGLE_BUTTON];

void ExitCB(MOBJECT obj, void *a, void *b)
{
   MShellDestroy((MOBJECT)b);
   MGUITerm();
   exit(0);
}

void ToggleButtonCB(MOBJECT rb, MVALUE status, void *ii)
{
   char str[128];
   int i;

   toggle_status[(int)ii] = (int)status;
   strcpy(str, "Button status: ");
   for (i=0; i < N_TOGGLE_BUTTON; i++)
      strcat(str, (toggle_status[i] ? "  ON" : " OFF"));
   MObjectSetText(label, str);
}

void MGUIMain(int argc, char **argv)
{
   int ii;
   char str[16];
   MOBJECT shell, rform, pb, tb;

   shell = MCreateShell("Sample 6", SF_NO_CLOSE);

   rform = MCreateRowForm(shell);
   for (ii=0; ii < N_TOGGLE_BUTTON; ii++)
   {
      sprintf(str, "Toggle %d", ii);
      tb = MCreateTButton(rform, str, HELV_L_FONT);
      MTButtonSetCallback(tb, ToggleButtonCB, (void *)ii);
   }
   label = MCreateLabel(rform, "", DEFAULT_FONT); 
   MTButtonActivate(tb);

   pb = MCreatePButton(shell, "Quit", TIMES_L_FONT);
   MPButtonSetCallback(pb, ExitCB, shell);

   MShellRealize(shell);

   MMainLoop();
}
By activating the last created toggle-button (MTButtonActivate(tb)),  the 'label' LABEL changes its text before the SHELL (the window) is  realized. This is useful to force the window size to a suitable width. 
// C++ version
#include <stdio.h>
#include <string.h>
#include "mguipp.h"

class CaAppl : public CmAppl {
public:
   void start(int, char **);
};

CaAppl appInstance;

class CaMainWindow : public CmShell {
        CmLabel *label;
        int toggle_status[4];
public:
   CaMainWindow(const char *title, int flags);
   void toggleButton1CB(int);
   void toggleButton2CB(int);
   void toggleButton3CB(int);
   void toggleButton4CB(int);
   void changeLabelText(int id, int status);
   void exitCB(void);
};

void CaMainWindow::exitCB(void)
{
   delete this;
   CmAppl::end(0);
}

void CaAppl::start(int argc, char **argv)
{
   CaMainWindow *win = new CaMainWindow("Example 6", SF_NO_CLOSE);
   win->realize();
   mainLoop();
}

CaMainWindow::CaMainWindow(const char *title, int flags)
: CmShell(title, flags)
{
   CmRowForm *rform;
   CmToggleButton *tb;
   CmPushButton *pb;

   for (int ii=0; ii < 4; ii++)
           toggle_status[ii] = 0;
   rform = new CmRowForm(this);
   tb= new CmToggleButton(rform, "Toggle 1", HELV_MEDIUM);
   tb->setCallback(this, (INT_CB)toggleButton1CB);
   tb= new CmToggleButton(rform, "Toggle 2", HELV_MEDIUM);
   tb->setCallback(this, (INT_CB)toggleButton2CB);
   tb= new CmToggleButton(rform, "Toggle 3", HELV_MEDIUM);
   tb->setCallback(this, (INT_CB)toggleButton3CB);
   tb= new CmToggleButton(rform, "Toggle 4", HELV_MEDIUM);
   tb->setCallback(this, (INT_CB)toggleButton4CB);
   label = new CmLabel(rform, "", DEFAULT_FONT);

   tb->arm();
   pb = new CmPushButton(this, "Quit", TIMES_MEDIUM);
   pb->setCallback(this, (VOID_CB)exitCB);
}

void CaMainWindow::changeLabelText(int btn, int status)
{
   char str[64];
   int ii;
   
   toggle_status[btn] = status;
   strcpy(str, "Button status: ");
   for (ii=0; ii < 4; ii++)
      strcat(str, (toggle_status[ii] ? "  ON" : " OFF"));
   label->setText(str);
}

void CaMainWindow::toggleButton1CB(int status)
{
   changeLabelText(0, status);
}

void CaMainWindow::toggleButton2CB(int status)
{
   changeLabelText(1, status);
}

void CaMainWindow::toggleButton3CB(int status)
{
   changeLabelText(2, status);
}

void CaMainWindow::toggleButton4CB(int status)
{
   changeLabelText(3, status);
}
Screenshot

Back