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Home » Community » Newbie corner » ProgressIndicator issue
ProgressIndicator issue [message #53223] Tue, 24 March 2020 11:21 Go to next message
idkfa46 is currently offline  idkfa46
Messages: 153
Registered: December 2011
Experienced Member
Hallo guys,
I have a problem with my ProgressIndicator included in StatusBar.

My ProgressIndicator do not show the indicator increase till the end of the cicle (where displaying 100%)... it seems like the statusbar is not refreshed everytime, isn't it?

If I add a progress too, it works perfectly! Why?

How can I fix it removing the progress?


Here is a little example:

class test : public WithtestLayout<TopWindow> {
	StatusBar status;
	ProgressIndicator pi;
	
public:
	void load();
	typedef test CLASSNAME;
	test();
};

test::test()
{
	CtrlLayout(*this, "Window title");
	
	AddFrame(status);
	pi.Hide();
	pi.Percent();
	status.Add(pi.RightPos(5, 200).TopPos(2, 15));

	goBtn <<= THISBACK(load);	
}

void test::load()
{
	Progress p;
	p.Create();
	
	pi.Show();
	pi.Set(0,1000000);
	
	for(int i = 0; i <=1000000; i++)
	{
		pi.Set(i);
		p.SetPos(i);
	}
	p.Close();
	pi.Close();
}

GUI_APP_MAIN
{
	test().Run();
}
Re: ProgressIndicator issue [message #53225 is a reply to message #53223] Tue, 24 March 2020 12:39 Go to previous messageGo to next message
Xemuth is currently offline  Xemuth
Messages: 310
Registered: August 2018
Location: France
Senior Member
Hello Idkfa46,

Put this at begining of Load function :
GuiLock __;


Like that's :
void test::load()
{
        GuiLock __;
	Progress p;
	p.Create();
	
	pi.Show();
	pi.Set(0,1000000);
	
	for(int i = 0; i <=1000000; i++)
	{
		pi.Set(i);
		p.SetPos(i);
	}
	p.Close();
	pi.Close();
}


It Should allow the thread created by callback to interract with the GUI wich is stick to the main thread


Re: ProgressIndicator issue [message #53226 is a reply to message #53225] Tue, 24 March 2020 13:02 Go to previous messageGo to next message
idkfa46 is currently offline  idkfa46
Messages: 153
Registered: December 2011
Experienced Member
I tryed but nothing changed Crying or Very Sad

thanks for your support,
Matteo
Re: ProgressIndicator issue [message #53227 is a reply to message #53226] Tue, 24 March 2020 13:44 Go to previous messageGo to next message
Xemuth is currently offline  Xemuth
Messages: 310
Registered: August 2018
Location: France
Senior Member
I will share you a simple test case to see

Re: ProgressIndicator issue [message #53228 is a reply to message #53223] Tue, 24 March 2020 14:21 Go to previous messageGo to next message
Xemuth is currently offline  Xemuth
Messages: 310
Registered: August 2018
Location: France
Senior Member
Here we go, this example show you how I deal with Progress Indicator, may there is another way of doing it (without thread maybe ?) But I don't know it.

May more experienced member wich know how to deal with it in a different way can share with us.

#include <CtrlLib/CtrlLib.h>

using namespace Upp;

class testIndicator : public TopWindow {
private:
	ProgressIndicator progress;
	Button button;
public:
	typedef testIndicator CLASSNAME;
	
	void myCallBack(){
		Thread().Run([&](){
			GuiLock __; //Since we are in thread we cant modify GUI, Except if we create a struct Name GuiLock wich will give ctrl of GUI to this thread
			button.Disable(); //Action on GUI
			GuiUnlock _; // Release the GUI Ctrl (if not done then the gui can freze because main thread wich processe Mouse/key Ctrl and other GUI things is stuck since it don't have Ctrl of GUI anymore)
			
			for(int e = 0; e <  11; e++){
				if(Thread::IsShutdownThreads()){break;}
				GuiLock __3;
				progress = e;
				GuiUnlock _3; //It's important to release before Sleep Else the main thread wont be able to refresh GUI during the sleep (because this thread keep the control of GUI))
				Sleep(1000);
			}
			
			GuiLock __2; //Same as before
			button.Enable();
			GuiUnlock _2;
			
			return;
		});
	}
		
	testIndicator(){
		Title("Exemple ProgressBar");
		SetRect(0, 0, 220, 70);
		
		Add(button.LeftPos(30, 150).TopPos(10, 20));
		button.SetLabel("Increase progressBar");
		button <<= THISBACK(myCallBack);
		
		Add(progress.LeftPos(10, 200).TopPos(40, 20));
		progress.Set(0,10);
	}
	
	~testIndicator(){
		Thread::ShutdownThreads(); //Thread released
	}
};

GUI_APP_MAIN
{
	testIndicator().Run();
}


[Updated on: Tue, 24 March 2020 14:24]

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Re: ProgressIndicator issue [message #53229 is a reply to message #53223] Tue, 24 March 2020 14:28 Go to previous messageGo to next message
Xemuth is currently offline  Xemuth
Messages: 310
Registered: August 2018
Location: France
Senior Member
Also, In your exemple, the window freze because during the loop, the main thread wich is the same as GUI thread is busy and wont refresh the GUI, that's why I have place my loop in another thread to let the GUI Thread free

Re: ProgressIndicator issue [message #53235 is a reply to message #53229] Tue, 24 March 2020 15:41 Go to previous messageGo to next message
idkfa46 is currently offline  idkfa46
Messages: 153
Registered: December 2011
Experienced Member
Thank you for your support! Your solution is really interesting but the easiest solution is to call
ProcessEvents();

as suggested me by Omari.

Best,
Matteo
Re: ProgressIndicator issue [message #53237 is a reply to message #53235] Tue, 24 March 2020 15:56 Go to previous message
Xemuth is currently offline  Xemuth
Messages: 310
Registered: August 2018
Location: France
Senior Member
idkfa46 wrote on Tue, 24 March 2020 15:41
Thank you for your support! Your solution is really interesting but the easiest solution is to call
ProcessEvents();

as suggested me by Omari.

Best,
Matteo


Indeed, it work as well without a thread ! the only default of this methode is (if I put it in my exemple) the gui is still lock during the Sleep function which is normal.
Their is howerver many workarround like doing this kind of things :
	void myCallBack(){
		button.Disable(); //Action on GUI
		ProcessEvents();
		for(int e = 0; e <  11; e++){
			progress = e;
			ProcessEvents();
			for(int i = 0; i < 100; i++){
				Sleep(10);
				ProcessEvents();
			}
			//Same as Sleep(1000) but with a better control on GUI (however it wont 'sleep' for
			// 1 second now, but for 1 sec +  100 * (processEvents() Time)
		}
		button.Enable();
		ProcessEvents();
		return;
	}


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