Change name of "errorstate" example to "tankgame"

The error state is not a big enough part of the example to justify naming it
after it.

3 files changed, 115 insertions, 0 deletions

diff --git a/examples/statemachine/tankgameplugins/random_ai/random_ai.pro b/examples/statemachine/tankgameplugins/random_ai/random_ai.pro
new file mode 100644
index 0000000..5bc0b26
--- /dev/null
+++ b/examples/statemachine/tankgameplugins/random_ai/random_ai.pro
@@ -0,0 +1,13 @@
+TEMPLATE      = lib
+CONFIG       += plugin
+INCLUDEPATH  += ../..
+HEADERS       = random_ai_plugin.h
+SOURCES       = random_ai_plugin.cpp
+TARGET        = $$qtLibraryTarget(random_ai)
+DESTDIR       = ../../tankgame/plugins
+
+#! [0]
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/statemachine/tankgame/plugins
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS random_ai.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/statemachine/tankgameplugins/random_ai
\ No newline at end of file
diff --git a/examples/statemachine/tankgameplugins/random_ai/random_ai_plugin.cpp b/examples/statemachine/tankgameplugins/random_ai/random_ai_plugin.cpp
new file mode 100644
index 0000000..c196247
--- /dev/null
+++ b/examples/statemachine/tankgameplugins/random_ai/random_ai_plugin.cpp
@@ -0,0 +1,38 @@
+#include "random_ai_plugin.h"
+
+#include <QState>
+#include <QtPlugin>
+
+#include <time.h>
+
+QState *RandomAiPlugin::create(QState *parentState, QObject *tank)
+{
+    qsrand(uint(time(NULL)));
+
+    QState *topLevel = new QState(parentState);
+
+    QState *selectNextActionState = new SelectActionState(topLevel);
+    topLevel->setInitialState(selectNextActionState);
+
+    QState *fireState = new RandomDistanceState(topLevel);
+    connect(fireState, SIGNAL(distanceComputed(qreal)), tank, SLOT(fireCannon()));
+    selectNextActionState->addTransition(selectNextActionState, SIGNAL(fireSelected()), fireState);
+
+    QState *moveForwardsState = new RandomDistanceState(topLevel);
+    connect(moveForwardsState, SIGNAL(distanceComputed(qreal)), tank, SLOT(moveForwards(qreal)));
+    selectNextActionState->addTransition(selectNextActionState, SIGNAL(moveForwardsSelected()), moveForwardsState);
+
+    QState *moveBackwardsState = new RandomDistanceState(topLevel);
+    connect(moveBackwardsState, SIGNAL(distanceComputed(qreal)), tank, SLOT(moveBackwards(qreal)));
+    selectNextActionState->addTransition(selectNextActionState, SIGNAL(moveBackwardsSelected()), moveBackwardsState);
+
+    QState *turnState = new RandomDistanceState(topLevel);
+    connect(turnState, SIGNAL(distanceComputed(qreal)), tank, SLOT(turn(qreal)));
+    selectNextActionState->addTransition(selectNextActionState, SIGNAL(turnSelected()), turnState);
+
+    topLevel->addTransition(tank, SIGNAL(actionCompleted()), selectNextActionState);
+
+    return topLevel;
+}
+
+Q_EXPORT_PLUGIN2(random_ai, RandomAiPlugin)
diff --git a/examples/statemachine/tankgameplugins/random_ai/random_ai_plugin.h b/examples/statemachine/tankgameplugins/random_ai/random_ai_plugin.h
new file mode 100644
index 0000000..f5e3b6f
--- /dev/null
+++ b/examples/statemachine/tankgameplugins/random_ai/random_ai_plugin.h
@@ -0,0 +1,64 @@
+#ifndef RANDOM_AI_PLUGIN_H
+#define RANDOM_AI_PLUGIN_H
+
+#include <QObject>
+#include <QState>
+
+#include <tankgame/plugin.h>
+
+class SelectActionState: public QState
+{
+    Q_OBJECT
+public:
+    SelectActionState(QState *parent = 0) : QState(parent)
+    {
+    }
+
+signals:
+    void fireSelected();
+    void moveForwardsSelected();
+    void moveBackwardsSelected();
+    void turnSelected();
+    
+protected:
+    void onEntry(QEvent *)
+    {
+        int rand = qrand() % 4;
+        switch (rand) {
+        case 0: emit fireSelected(); break;
+        case 1: emit moveForwardsSelected(); break;
+        case 2: emit moveBackwardsSelected(); break;
+        case 3: emit turnSelected(); break;
+        };
+    }
+};
+
+class RandomDistanceState: public QState
+{
+    Q_OBJECT
+public:
+    RandomDistanceState(QState *parent = 0) : QState(parent)
+    {
+    }
+
+signals:
+    void distanceComputed(qreal distance);
+
+protected:
+    void onEntry(QEvent *)
+    {
+        emit distanceComputed(qreal(qrand() % 180));
+    }
+};
+
+class RandomAiPlugin: public QObject, public Plugin
+{
+    Q_OBJECT
+    Q_INTERFACES(Plugin)
+public:
+    RandomAiPlugin() { setObjectName("Random"); }
+
+    virtual QState *create(QState *parentState, QObject *tank);
+};
+
+#endif // RANDOM_AI_PLUGIN_H