Disabling Push Button Widget after it is pressed

Hi Eisen,

I don't know what is the "said" button in your question. Please check the TivaWare Graphic Library user Guide:

www.ti.com/.../spmu300a.pdf

Regards,
QJ

Hi QJ,

It's like lets say I want to disable the "Start" button in the LCD after pressing it. Is that possible?

 Thanks!

Hello Eisen

Yes, that is possible. Can you please share the call back function for the button press?

Regards
Amit

This is the part:

while(1)
{
//
// Start Button is pressed.
//
if(PushButtonCallbackSet(g_sStartButton, pfnOnClik) == 0x00)
{
ROM_SysCtlDelay(900000); //Delay to ensure no accidental pressing
UARTprintf("%s\r\n", "RUN");
}

//
// Stop Button is pressed.
//
if(PushButtonCallbackSet(g_sStartButton, pfnOnClik)) == 0x00)
{
ROM_SysCtlDelay(900000); ////Delay to ensure no accidental pressing
UARTprintf("%s\r\n", "STP");
}
}
}


I would like to disable the start button once it is pressed and the same for the stop button.
Thanks!

Eisen

Hello Eisen,

If you are using the grlib, then the Push button widget has the ability to call a function on press. It seems that you are using a while 1 loop in main which is not a good idea. Can you perform the same with the callback function called on the button press?

Regards
Amit

Oh wait sorry, I didn't give the updated code, it is supposed to look like this:

while(1)
{
//
// Means the Start Button is pressed.
//
if(g_sStartButtonState == true)
{
ROM_SysCtlDelay(900000);
UARTprintf("%s\r\n", "RUN");
}

//
// Means the Stop Button is pressed.
//
if(g_sStopButtonState == true)
{
ROM_SysCtlDelay(900000);
UARTprintf("%s\r\n", "STP");
}
}
}

And i used a while 1 loop because my code isn't very complex so I thought that I could just use this. And the disable the code button, do i just add a g_sStartButtonState == false after the UARTprintf?

Hello Eisen

But how are g_sStartButtonState and g_sStoptButtonState are being updated?

Regards
Amit

I have another code for the Kentec LCD.

Here is the void part:

void StartButtonPress(tWidget *pWidget){
g_sStartButtonState = !g_sStartButtonState; //change StartButtonState to True
WidgetRemove((tWidget *)&g_sStartButton);
WidgetAdd(WIDGET_ROOT, (tWidget *)&g_sStopButton);
WidgetPaint(WIDGET_ROOT);
}
//-----------------------------------------------------------------------------
void StopButtonPress(tWidget *pWidget){
g_sStopButtonState = !g_sStopButtonState; //change StopButtonState to True
WidgetRemove((tWidget *)&g_sStopButton);
WidgetAdd(WIDGET_ROOT, (tWidget *)&g_sStartButton);
WidgetPaint(WIDGET_ROOT);
}

Hi Amit,

Thanks for the suggestion, the button can be used now.

Eisen

Hello Eisen

If you can share your code on the forum, it may be a useful resource for others.

Regards
Amit

Hi,

Yeah here it is for the buttons:

//-----------------------------------------------------------------------------
void StartButtonPress(tWidget *pWidget){
g_sStartButtonState = !g_sStartButtonState; //change StartButtonState to True
WidgetRemove((tWidget *)&g_sStartButton);
WidgetAdd(WIDGET_ROOT, (tWidget *)&g_sStopButton);
WidgetPaint(WIDGET_ROOT);
}
//-----------------------------------------------------------------------------
void StopButtonPress(tWidget *pWidget){
g_sStopButtonState = !g_sStopButtonState; //change StopButtonState to True
WidgetRemove((tWidget *)&g_sStopButton);
WidgetAdd(WIDGET_ROOT, (tWidget *)&g_sStartButton);
WidgetPaint(WIDGET_ROOT);
}

void main(void){
SysCtlClockSet(SYSCTL_SYSDIV_4|SYSCTL_USE_PLL|SYSCTL_OSC_MAIN|SYSCTL_XTAL_16MHZ);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);

LCD_Init();
StartUpScreen();
while(1)
{
WidgetMessageQueueProcess();
}
}