foreach....recursively - assistance with C++ code wnated

Lost User

I am asking for code assistance, I am NOT asking for opinions, to implement "foreach" to be able to write something likes "action-> trigger this code " I am asking for code help to rewrite this to recursively go thru the object hierarchy until "textMatch" is found

QString textMatch = test; // "tile";
QList pTEST = parent->findChildren();

    foreach( auto \*action, pTEST)
    {
        text = action->objectName();
        qDebug().noquote() << text;
        if(text.contains(textMatch))
        {

#ifdef RETILE
text = "match found parent ";
text += parent->objectName();
text += "\n action ";
text += action->objectName();
qDebug().noquote() << text;
#endif

            action->trigger();
            text += "  foreach match ";
            qDebug().noquote() << text;
            return 0;
            break;
        }
    }

The code abiove works fine "in single stage", I need it to iterate , using foreach preferred, but not mandatory, thru the entire tree. PLEASE NOTE This is an "under construction code " and will be deleted AFTER solution is found.

"actionTile_subwindows" QAction

Locals		
	event	@0x7fffffffca20	QCloseEvent
	mdiParent	@0x7ffff4ea5453	QMdiSubWindow
	pActions		QList
	pL		QList
	pLParent		QList
	pLParent\_Action		QList
	pOBJECT	0x5d0000006e	QWidget\*
	pTEST	@0x7fffffffc550	QWidget
	this	"SettingsDialog"	SettingsDialog
		\[QDialog\]	"SettingsDialog"	QDialog
		\[d\]	@0x555555d923e0	QDialogPrivate
		\[parent\]	@0x555555de3310	QMdiSubWindow
			\[QWidget\]	@0x555555de3310	QWidget
			\[d\]	@0x5555556d1000	QMdiSubWindowPrivate
			\[parent\]	@0x555555c30e80	QWidget
				\[QObject\]	@0x555555c30e80	QObject
				\[QPaintDevice\]	@0x555555c30e90	QPaintDevice
				\[d\]	@0x555555c30ec0	QWidgetPrivate
				\[parent\]	@0x555555c64250	QMdiArea
					\[QAbstractScrollArea\]	@0x555555c64250	QAbstractScrollArea
					\[d\]	@0x5555559ff1a0	QMdiAreaPrivate
					\[parent\]	"MainWindow\_Bluetooth"	MainWindow\_Bluetooth
						\[QMainWindow\]	"MainWindow\_Bluetooth"	QMainWindow
						\[d\]	@0x555555c2ed00	QMainWindowPrivate
						\[parent\]	@0x555555ccf290	QMdiSubWindow
						\[children\]	<35 items>	QList
							\[0\]	"\_layout"	QMainWindowLayout

k5054

There's probably a nice template way to do this. But if I understand you're problem, here's a simple C++ program with multi-level tree that you may be able to adapt to your situation:

#include
#include

class Tree {
public:
int datum;
std::vector children;
Tree(int d) :datum(d) {}
};

void walk(Tree& t, size_t n, void fn(const Tree& t, size_t n) )
{
fn(t, n);
for(auto child: t.children)
walk(child, n+1, fn);
}

int main()
{
Tree t(0);
for(int x = 1; x < 3; ++x)
{
Tree tmp(x);
t.children.push_back(tmp);
}
for(int y = 100; y < 500; y += 100 )
{
Tree tmp(y);
t.children[0].children.push_back(tmp);
}

walk(t, 0,  \[\](const Tree& t, size\_t indent) { std::cout << std::string(indent\*3, ' ') << t.datum << '\\n'; });

}

This processes the parent before the children, but you can reverse the lines of the walk function to do the children first, if preferred. foreach is not part of the C++ standard, but the ranged for loop has been since C++-11, so your compiler almost certainly supports it. Whether QT containers will work with ranged for loops is not known to me. Still, the idea is the same. Create a recursive function that processes the parent, then calls itself on each of the children. I'm sure there's a more generic way to do this using templates, that parameterizes the function, which would mean you don't have to write a separate walk function for every distinct function prototype on fn. Maybe that's an exercise you could undertake to help improve your understanding of templates, and other C++ facilities.

"A little song, a little dance, a little seltzer down your pants" Chuckles the clown

Lost User

Thank you. I was hoping to build on my current knowledge and working code , regardless if it is standard or not. I am looking into this

QTreeWidgetItemIterator it(parent(this));

and have two issues with it I still cannot access the object "parent" and it looks as this class expects tree widget to iterate. Moore RTFM.

k5054

Salvatore Terress wrote:

Moore RTFM

Correct

"A little song, a little dance, a little seltzer down your pants" Chuckles the clown

Lost User

It worked... I did save you a time to write FOUR letters... Maybe I should end my post instead of Cheers ( I hope you take this post as a joke ...good night from Huston )

Lost User

Well, I am getting few "try it this way". I believe there are many ways to "skin a cat" , but these well meaning alternative suggestion are distraction from the task at hand. Actually I have to "back-paddle " in my "foreach"' approach. Before I can iterate I have to have a list and it better be of compatible type... That also applies if I use any of the Qt ways to iterate... Cheers