source: cpp/frams/_demos/mutableparam_test.cpp @ 1237

#include <frams/util/sstringutils.h>
#include <common/virtfile/stdiofile.h>
#include <frams/param/mutableparam.h>
#include <frams/param/mutparamlist.h>
#include <frams/param/paramtrans.h>

static void printParam(ParamInterface &pi)
{
        printf("groups:\n");
        for (int g = 0; g < pi.getGroupCount(); g++)
                printf("- %s\n", pi.grname(g));
        printf("properties:\n");
        for (int i = 0; i < pi.getPropCount(); i++)
                if (!(pi.flags(i) & PARAM_USERHIDDEN))
                        printf("- %s (i=%d)\n", pi.id(i), i);
}

int main()
{
        StdioFILE::setStdio(); //setup VirtFILE::Vstdin/out/err

        //creating 3 objects
        MutableParam p1("Object1", "Group 1"), p2("Object2", "Group 2"), p3("Object3", "Group 3");

        p1.addGroup("Added Group");
        p1.addGroup("Added Group 2");

        p1.addProperty(NULL, "f1", "d 0 5", "Field 1", "Description 1", 0/*flags*/, 0/*group*/, -1);
        p2.addProperty(NULL, "f2", "s", "Field 2", "Description 2", 0/*flags*/, 1/*group*/, -1);
        p3.addProperty(NULL, "f3", "d 0 1", "Field 3", "Description 3", 0/*flags*/, 1/*group*/, -1);

        MutableParamList combined;
        combined += &p1;
        combined += &p2;
        combined += &p3;

        ParamTransaction paramtrans(combined);

        printf("\n=== Combined ===\n");
        printParam(combined);

        printf("\nNow adding new property in p1...\n");
        p1.addProperty(NULL, "f4", "x", "Field 4", "Description 4", 0/*flags*/, 0/*group*/, -1);

        printf("\n=== After adding f4 ===\n");
        printParam(combined);

        printf("\n=== Transaction view maintains the original index association ===\n");
        //...so it can be safely iterated by index while param properties are being added or removed
        //without knowing or detecing what was changed.
        //Use case: simulator parameters in GUI - setting the "expdef" property
        //affects the properties of the selected and set experiment definition.
        printParam(paramtrans);

        printf("\nProperties changed: %s   Groups changed: %s\n\n", paramtrans.propChanged() ? "YES" : "NO", paramtrans.groupChanged() ? "YES" : "NO");

        printf("Now removing group in p1...\n");
        p1.removeGroup(1);

        printf("\nProperties changed: %s   Groups changed: %s\n\n", paramtrans.propChanged() ? "YES" : "NO", paramtrans.groupChanged() ? "YES" : "NO");

        //in GUI, paramtrans.groupChanged() can be used to trigger rebuilding the tree of groups
        //(see also: Framsticks GUI and sources of paramtree_* examples).

        return 0;
}