feat: QtComboModeShow

QtComboModeShow/QtComboModeShow.pro

@@ -0,0 +1,16 @@
+QT -= gui
+
+CONFIG += c++11 console
+CONFIG -= app_bundle
+
+# You can make your code fail to compile if it uses deprecated APIs.
+# In order to do so, uncomment the following line.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+SOURCES += \
+        main.cpp
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target

QtComboModeShow/main.cpp

@@ -0,0 +1,39 @@
+#include <iostream>
+#include <QVector>
+using namespace std;
+
+
+class A
+{
+public:
+
+    void add(A *pt){ m_v.push_back(pt); }
+
+    QVector<A *> m_v;
+    QString m_name;
+};
+
+class B : public A
+{
+public:
+    void add(A *pt){ m_v.push_back(pt); }
+};
+
+
+class C : public A
+{
+public:
+};
+
+int main(int argc, char *argv[])
+{
+    A ma1;
+    B mb1, mb2, mb3, mb4;
+    C mc1, mc2, mc3;
+
+    ma1.add(&mb1); ma1.add(&mb3);
+    mb1.add(&mc1); mb1.add(&mb2);
+    mb3.add(&mc2); mb3.add(&mc3); mb3.add(&mb4);
+
+    return 0;
+}