change pages by one key

[Alan Chang]

Hello,

If I want to control the 2 GHandles by one key, what can I do?

It is like to switch 2 pages, and there are ghButton1 and ghButton2 in the different page.

I use gwinAttachToggle to assign ghButton1 and can change to page 2.

Quote

gwinAttachToggle(ghButton1, 0, 0);    

How can I assign  ghButton2 and return back page 1?

 

Quote

switch (pe->type) {
            case GEVENT_GWIN_BUTTON:
                if (((GEventGWinButton*)pe)->gwin == ghButton1) {
                    guiShowPage(1);
                }
                
                else if (((GEventGWinButton*)pe)->gwin == ghButton2) {
                    guiShowPage(0);
                }
                break;
            }

 

Please give some advice.

Thanks.

 

[Joel Bodenmann]

Hello Alan,

Unfortunately, I don't really understand your question. The code you're showing is correct. That is the proper way of doing it. You can't do anything other than that - it's the intended way of handling this.

[Alan Chang]

Hi Joel,

Thanks for your reply.

Maybe I did not describe my question well. Sorry about that.

Now I am using STM32F429i-discovery board.  There is only one USER button on this board.

According to this code, I have 2 pages.

void guiShowPage(unsigned pageIndex)
{
	gwinHide(ghContainerPage0);
	gwinHide(ghContainerPage1);

	switch (pageIndex) {
	case 0:
		gwinShow(ghContainerPage0);
		break;

	case 1:
		gwinShow(ghContainerPage1);
		break;

	default:
		break;
	}

I want to switch these 2 pages when get ghButton1 or ghButton2 event.

ghButton1 is in ghContainerPage0. ghButton2 is in ghContainerPage1.

So when get ghButton1, change to ghContainerPage1.

when get ghButton2, change back to ghContainerPage0.

switch (pe->type) {
            case GEVENT_GWIN_BUTTON:
                if (((GEventGWinButton*)pe)->gwin == ghButton1) {
                    guiShowPage(1);
                }
                
                else if (((GEventGWinButton*)pe)->gwin == ghButton2) {
                    guiShowPage(0);
                }
                break;
            }

 

However, I only have one button on my  STM32F429i-discovery board.

Can I use same button and attach to ghButton1 and ghButton2?

I have tried this way, but it was wrong action.

gwinAttachToggle(ghButton1, 0, 0);	
gwinAttachToggle(ghButton2, 0, 0);

 

Then I change other way like this.

gwinAttachToggle(ghButton1, 0, 0);	
gwinAttachToggle(ghButton2, 1, 0);

But also wrong.

 

My question is below.

1. I want to know how to set ghButton1 and  ghButton2 in same toggle instance. Is that possible?

2. What is the "role" meaning in  gwinAttachToggle()?

 

Please give me some advice or other solution.

Hope you can understand my question.

 

Thanks,  Joel.

[Alan Chang]

Hello,

Does someone help me? I really do not have idea. Thanks.

[Joel Bodenmann]

Hello Alan,

The solution to this is simple: Extend your guiShowPage() function to attach the physical button to the corresponding software button of each page (untested code!):

void guiShowPage(unsigned pageIndex)
{
	// Detach all toggles
	gwinDetachToggle(ghButton1, 0);
	gwinDetachToggle(ghButton2, 0);

	// Hide all containers
	gwinHide(ghContainerPage0);
	gwinHide(ghContainerPage1);

	switch (pageIndex) {
	case 0:
		gwinShow(ghContainerPage0);
		gwinAttachToggle(ghButton1, 0, 0);
		break;

	case 1:
		gwinShow(ghContainerPage1);
		gwinAttachToggle(ghButton2, 0, 0);
		break;

	default:
		break;
	}
}

Note that you'll have to use the latest master branch state from the µGFX repository as the gwinDetachToggle() function is not part of the v2.7 release yet.

I hope that helps.

[Alan Chang]

Hi Joel,

Thanks for your reply.

I tried this code.

void guiShowPage(unsigned pageIndex)
{
	// Detach all toggles
	gwinDetachToggle(ghButton1, 0);
	gwinDetachToggle(ghButton2, 0);
	
	// Hide all pages
	gwinHide(ghContainerPage0);
	gwinHide(ghContainerPage1);

	// Show page selected page
	switch (pageIndex) {
	case 0:
		gwinShow(ghContainerPage0);
		gwinAttachToggle(ghButton1, 0, 0);
		break;

	case 1:
		gwinShow(ghContainerPage1);
		gwinAttachToggle(ghButton2, 0, 0);
		break;

	default:
		break;
	}
}


void guiEventLoop(void)
{

	while (1) {
		
			// Get an event
		pe = geventEventWait(&glistener, TIME_INFINITE );
		

	switch (pe->type) {
			case GEVENT_GWIN_BUTTON:
				if (((GEventGWinButton*)pe)->gwin == ghButton1) {
					
					guiShowPage(1);
				}
				
				else if (((GEventGWinButton*)pe)->gwin == ghButton2) {
					
					guiShowPage(0);
				}
				break;
			}
	}
}

It is not work.

But If I do not use "gwinDetachToggle", it can work.

void guiShowPage(unsigned pageIndex)
{
	// Detach all toggles
	//gwinDetachToggle(ghButton1, 0);
	//gwinDetachToggle(ghButton2, 0);
	
	// Hide all pages
	gwinHide(ghContainerPage0);
	gwinHide(ghContainerPage1);

	// Show page selected page
	switch (pageIndex) {
	case 0:
		gwinShow(ghContainerPage0);
		gwinAttachToggle(ghButton1, 0, 0);		
		break;

	case 1:
		gwinShow(ghContainerPage1);
		gwinAttachToggle(ghButton2, 0, 0);
		break;

	default:
		break;
	}
}

 

What is  "gwinDetachToggle"?

 

Thanks.

[Joel Bodenmann]

What does "doesn't work" mean? Can you please be more specific.

[Alan Chang]

Hi Joel,

I tried this code first.

void guiShowPage(unsigned pageIndex)
{
	// Detach all toggles
	gwinDetachToggle(ghButton1, 0);
	gwinDetachToggle(ghButton2, 0);
	
	// Hide all pages
	gwinHide(ghContainerPage0);
	gwinHide(ghContainerPage1);

	// Show page selected page
	switch (pageIndex) {
	case 0:
		gwinShow(ghContainerPage0);
		gwinAttachToggle(ghButton1, 0, 0);
		break;

	case 1:
		gwinShow(ghContainerPage1);
		gwinAttachToggle(ghButton2, 0, 0);
		break;

	default:
		break;
	}
}


void guiEventLoop(void)
{

	while (1) {
		
			// Get an event
		pe = geventEventWait(&glistener, TIME_INFINITE );
		

	switch (pe->type) {
			case GEVENT_GWIN_BUTTON:
				if (((GEventGWinButton*)pe)->gwin == ghButton1) {
					
					guiShowPage(1);
				}
				
				else if (((GEventGWinButton*)pe)->gwin == ghButton2) {
					
					guiShowPage(0);
				}
				break;
			}
	}
}

 

When press physical button, the page did not change. Same as before.

 

Then I tried to remove the gwinDetachToggle, and run again.

void guiShowPage(unsigned pageIndex)
{
	
	// Hide all pages
	gwinHide(ghContainerPage0);
	gwinHide(ghContainerPage1);

	// Show page selected page
	switch (pageIndex) {
	case 0:
		gwinShow(ghContainerPage0);
		gwinAttachToggle(ghButton1, 0, 0);
		break;

	case 1:
		gwinShow(ghContainerPage1);
		gwinAttachToggle(ghButton2, 0, 0);
		break;

	default:
		break;
	}
}

It can work now.

I can change page when press the physical button.

Hope you can understand.

 

I searched the gwinDetachToggle, but I still do not figure out this function.

Thanks.

 

[Joel Bodenmann]

In my post I wrote that the gwinDetachToggle() function is not in the current release. Please use the latest master branch of the µGFX repository:

On 8/28/2017 at 10:20, Joel Bodenmann said:

Note that you'll have to use the latest master branch state from the µGFX repository as the gwinDetachToggle() function is not part of the v2.7 release yet.

[Alan Chang]

Hi Joel,

I have check the file "changelog.txt".

I can see "*** Changes after 2.7 ***".

Does that mean that I use the latest version?

 

Thanks.

  

[Joel Bodenmann]

Hi Alan,

No, that just means that you use some state of the library after the official 2.7 release.
Please just do as I told you and grab the latest master branch from the git repository here: https://git.ugfx.io/uGFX/uGFX
If you never worked with git or you don't want to get into it, you can always just download a ZIP archive of the latest state: https://git.ugfx.io/uGFX/uGFX/archive/master.zip