#include "skygi/skygi.h"          /* Include GI Functions */

#define BUTTON_EXIT 1             /* Define value of Button Exit */
#define BUTTON_ENABLE 2           /* Define value for Enable Button */
#define BUTTON_DISABLE 3          /* Define value for Disable Button */

void * EventHandler(HANDLE hWnd, s_gi_msg *msg); /* Prototype our Event Handler */

HANDLE ExitButton;                /* Create HANDLE for the ExitButton */
HANDLE EnableButton;              /* Create HANDLE for the EnableButton */
HANDLE DisableButton;             /* Create HANDLE for DisableButton */

int main() {
    sCreateApplication *app;      /* Create Main Application Struct */
    HANDLE MainWin;               /* Create HANDLE for the Main Window */
    s_gi_msg msg;                 /* Create Messaging Passing Interface */    
    if (GI_Initialize() != 0) {   /* Initialize GI and check for failure */
            fprintf(stderr, "Unable to Init GI");
            return -1;
    }
    
    app = GI_ApplicationStructCreate();        /* Create Application Struct */
    
    strcpy(app->ucApplicationName, "Buttons"); /* Set the Title */
    app->uiX = 0;                              /* Set Starting X Coordinate */
    app->uiY = 0;                              /* Set Starting Y Coordinate */
    app->uiHeight = 60;                        /* Set Window Height */
    app->uiWidth = 100;                        /* Set Window Width */
    app->uiStyleApplication = 0;               /* Set Application Style 
                                                                  to Default */
    app->uiStyleFrame = 0;                     /* Set Frame Style to Default */
    app->uiStyleTitle = 0;                     /* Set Title Style to Default */
    app->uiStyleMenu = 0;                      /* Set Menu Style to Default */
    app->uiStyleBar = 0;                       /* Set Bar Style to Default */
    app->uiStyleClient = 0;                    /* Set Client Style to Default */
    app->uiBackGroundColor = 0;                /* Set Background Color
                                                                  to Default */
    app->fwndClient = EventHandler;            /* Set Event Handler Name,
                                                *  The value of fwndClient will
                                                *  have to be the same as the name
                                                * of the Event Handler Function
                                                *  we prototyped earlier 
                                                */
    
    MainWin = GI_ApplicationCreate(app);       /* Creates Application using
                                                *  Settings we specified earlier
                                                */
    ExitButton = GI_WidgetButtonCreate(        /* Create Button */
                                       MainWin,/* HANDLE of Parent Window */
                                       "Exit", /* Text to be displayed */
                                       5,      /* X */
                                       5,      /* Y */
                                       40,     /* Width */
                                       20,     /* Height, must always be
                                                *  20, style won't allow >20
                                                */
                                       0,      /* Default Style */
                                       BUTTON_EXIT /* ID; this ID will be passed
                                                    * to the message handler
                                                    * when the button is pressed
                                                    */
                                       );
    GI_WidgetButtonSetTooltip(                     /* Create a Tooltip */
                              ExitButton,          /* For ExitButton */
                              "Click to Exit",     /* Text to be displayed */
                              20                   /* Popup time in Milliseconds */
                             );
    DisableButton = GI_WidgetButtonCreate(         /* Create Button */
                                         MainWin,  /* HANDLE of Parent Window */
                                         "Disable",/* Text to be displayed */
                                         50,       /* X */
                                         5,        /* Y */
                                         50,       /* Width */
                                         20,       /* Height */
                                         0,        /* Default Style */
                                         BUTTON_DISABLE /* ID */
                                        );
    EnableButton = GI_WidgetButtonCreate(          /* Create Button */
                                         MainWin,  /* HANDLE of Parent Window */
                                         "Enable", /* Text to be displayed */
                                         50,       /* X */
                                         30,       /* Y */
                                         50,       /* Width */
                                         20,       /* Height */
                                         0,        /* Default Style */
                                         BUTTON_ENABLE /* ID */
                                        );
    
    if (GI_ApplicationWindowShow(MainWin) != S_OK) {
            /* Show Application Window and check return value */
            fprintf(stderr, "Unable to Show Application Window");
            return -1;
    }
    
    int run;
    while (1) {                               /* Endless loop, to make the
                                                 Window stay open */
          run = GI_MessageWait(&msg, NULL);   /* Get return value to check for
                                                 messages */
                                              /* GI_MessageWait() returns 0 on
                                                 MSG_QUIT */
          if (!run)                           /* If GI_MessageWait returned 0 */
             if (msg.win == MainWin)          /* Check if MSG_QUIT was sent to 
                                                 MainWin */
                break;                        /* If so, break out of the while
                                                 loop */
		GI_MessageDispatch(msg.win, &msg);
    }
    GI_WindowDestroy(MainWin);                /* Close Window */
    return 0;                                 /* End Program */
}

void * EventHandler(HANDLE hWnd, s_gi_msg *msg) {
    switch (msg->type) {                      /* Check for messages */
           case MSG_DESTROY:                  /* If message is MSG_DESTROY: */
                GI_MessageQuitPost(hWnd);     /* Send MSG_QUIT to MainWin */
                break;
           case MSG_COMMAND:                  /* If message is a command: */
                switch (msg->para1) {         /* Check type of message */
                       case BUTTON_EXIT:      /* If message is BUTTON_EXIT: */
                            GI_MessageQuitPost(hWnd); /* Send MSG_QUIT to
                                                       * MainWin
                                                       */
                                   break;
                       case BUTTON_ENABLE:
                            GI_WidgetButtonEnable(DisableButton); /* Enable
                                                                   * button */
                            break;
                       case BUTTON_DISABLE:
                            GI_WidgetButtonDisable(DisableButton); /* Disable
                                                                    * button */
                            break;                                          
                }
           break;
    }
}