Error while setting callback for Widget

[mohamed.irshad.k]

I have the below script in my world.cpp

// Unigine script
namespace Widgets
{
WidgetButton CreateButton()
{
	Gui gui = engine.getGui();
	WidgetButton widgetButton = new WidgetButton(gui);
	gui.addChild(widgetButton, GUI_ALIGN_EXPAND);
	widgetButton.setCallback(GUI_CLICKED, "Widgets::Button_Clicked");
	return widgetButton;
}

void Button_Clicked()
{
	// Do stuff....
}
}

 

I call this CreateButton funtion from C++:

engine->runWorld("Widgets::CreateButton");

Unigine crashes at the line:

widgetButton.setCallback(GUI_CLICKED, "Widgets::Button_Clicked");

 

I tried push/popWorld, but didn't help.

[Guest mrred]

I have the below script in my world.cpp

// Unigine script
namespace Widgets
{
WidgetButton CreateButton()
{
	Gui gui = engine.getGui();
	WidgetButton widgetButton = new WidgetButton(gui);
	gui.addChild(widgetButton, GUI_ALIGN_EXPAND);
	widgetButton.setCallback(GUI_CLICKED, "Widgets::Button_Clicked");
	return widgetButton;
}

void Button_Clicked()
{
	// Do stuff....
}
}

 

I call this CreateButton funtion from C++:

engine->runWorld("Widgets::CreateButton");

Unigine crashes at the line:

widgetButton.setCallback(GUI_CLICKED, "Widgets::Button_Clicked");

 

I tried push/popWorld, but didn't help.

 

Please, attach your log.html file located at the bin directory of project and your script so that we could reproduce and fix this.

[mohamed.irshad.k]

Please, attach your log.html file located at the bin directory of project and your script so that we could reproduce and fix this.

Please find attached the log.html, world.cpp and world.world files.

log.html

world1.cpp

world1.world

[Guest mrred]

As a temporal workaround try commenting this line

return widgetButton;

If You will still experience crash, please, post here or send for support@unigine.com a minimal version of your C++ Application so that we could reproduce this issue and find a solution.

[mohamed.irshad.k]

I tried your workaround, but still the program is crashing. I have mailed a sample project to support@unigine.com for reproducing the issue.

[Guest mrred]

I tried your workaround, but still the program is crashing. I have mailed a sample project to support@unigine.com for reproducing the issue.

Thank You, we'll try to reproduce this issue now. I will contact you soon.

[Guest mrred]

We found the source of this issue. It is this line that makes unigine crash:

widgetButton.setCallback(GUI_CLICKED, "Widgets::Button_Clicked");

Thank You for pointing this bug for us. We will fix it in the next SDK release approximately in a month.

[mohamed.irshad.k]

Thanks mrred.

 

For the time being, is there any work around for this? In our project, we need to set the callback from C++ side.

[Guest jashik]

You can use deferred execution to make a callback for widget.

 

Example:

 

[C++: main.cpp]

#include <Unigine.h>
#include <UnigineInterpreter.h>

using namespace Unigine;

int main(int argc, char * argv[]) {

Engine * engine = Engine::init(UNIGINE_VERSION, argc, argv);

int count = 5; // For delay
Variable command("CreateButton");

while (!engine->isDone()) {
	if(count == 0) {
		engine->runWorld("addDeferredExecution",command);
		count = -1;
	} else if(count > 0) {
		count--;
		Log::warning("count = %d \n",count);
	}

	engine->update();
	engine->render();
	engine->swap();
}

engine->shutdown();

return 0;
}

 

 

[unigineScript: world1.cpp]

/*
*/
string deferred_executions[0];

/*
*/
int init() {
engine.game.setPlayer(new PlayerSpectator());
return 1;
}

/*
*/
int shutdown() {
return 1;
}

/*
*/
int update() {
if(deferred_executions.size() > 0) {
	forloop(int i = 0; deferred_executions.size()) {
		string command = deferred_executions[i];
		log.message("call command '%s'\n",command);
		engine.world.call(deferred_executions[i]);
	}
	deferred_executions.clear();
}
return 1;
}

/* 
*/
void addDeferredExecution(string command) {
log.message("add command '%s'\n",command);
deferred_executions.append(command);
}

/* 
*/
void CreateButton() {
Gui gui = engine.getGui();
WidgetButton widgetButton = new WidgetButton(gui);	
widgetButton.setCallback(GUI_CLICKED,"call_back");
gui.addChild(widgetButton, GUI_ALIGN_LEFT);
log.message("CreateButton \n");
}

/*
*/
void call_back() {
engine.console.print("In call_back()\n");
}

[mohamed.irshad.k]

That did the trick!

 

Thanks Jashik.