Add IMonitorHandler interface

Author: adazem009

CMakeLists.txt

@@ -53,6 +53,7 @@ target_sources(scratchcpp
     include/scratchcpp/igraphicseffect.h
     include/scratchcpp/comment.h
     include/scratchcpp/monitor.h
+    include/scratchcpp/imonitorhandler.h
 )
 
 add_library(zip SHARED

include/scratchcpp/imonitorhandler.h

@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "global.h"
+
+namespace libscratchcpp
+{
+
+class Monitor;
+
+class LIBSCRATCHCPP_EXPORT IMonitorHandler
+{
+    public:
+        virtual ~IMonitorHandler() { }
+
+        virtual void init(Monitor *) = 0;
+};
+
+} // namespace libscratchcpp

include/scratchcpp/monitor.h

@@ -9,6 +9,7 @@
 namespace libscratchcpp
 {
 
+class IMonitorHandler;
 class Block;
 class Sprite;
 class Rect;
@@ -29,6 +30,8 @@ class LIBSCRATCHCPP_EXPORT Monitor : public Entity
         Monitor(const std::string &id, const std::string &opcode);
         Monitor(const Monitor &) = delete;
 
+        void setInterface(IMonitorHandler *iface);
+
         Mode mode() const;
         void setMode(Mode mode);
 

src/scratch/monitor.cpp

@@ -4,6 +4,7 @@
 #include <scratchcpp/block.h>
 #include <scratchcpp/sprite.h>
 #include <scratchcpp/rect.h>
+#include <scratchcpp/imonitorhandler.h>
 
 #include "monitor_p.h"
 #include "engine/internal/randomgenerator.h"
@@ -22,6 +23,15 @@ Monitor::Monitor(const std::string &id, const std::string &opcode) :
 {
 }
 
+/*! Sets the monitor interface. */
+void Monitor::setInterface(IMonitorHandler *iface)
+{
+    impl->iface = iface;
+
+    if (iface)
+        iface->init(this);
+}
+
 /*! Returns the monitor's mode. */
 Monitor::Mode Monitor::mode() const
 {

src/scratch/monitor_p.h

@@ -15,6 +15,7 @@ struct MonitorPrivate
         MonitorPrivate(const std::string &opcode);
         MonitorPrivate(const MonitorPrivate &) = delete;
 
+        IMonitorHandler *iface = nullptr;
         Monitor::Mode mode = Monitor::Mode::Default;
         std::shared_ptr<Block> block; // Compiler needs shared_ptr
         unsigned int width = 0;

test/mocks/monitorhandlermock.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <scratchcpp/imonitorhandler.h>
+#include <gmock/gmock.h>
+
+using namespace libscratchcpp;
+
+class MonitorHandlerMock : public IMonitorHandler
+{
+    public:
+        MOCK_METHOD(void, init, (Monitor *), (override));
+};

test/scratch_classes/monitor_test.cpp

@@ -3,6 +3,7 @@
 #include <scratchcpp/sprite.h>
 #include <scratchcpp/rect.h>
 #include <scratch/monitor_p.h>
+#include <monitorhandlermock.h>
 #include <randomgeneratormock.h>
 
 #include "../common.h"
@@ -33,6 +34,15 @@ TEST(MonitorTest, Id)
     ASSERT_EQ(monitor.id(), "def");
 }
 
+TEST(MonitorTest, Interface)
+{
+    Monitor monitor("", "");
+    MonitorHandlerMock iface;
+
+    EXPECT_CALL(iface, init(&monitor));
+    monitor.setInterface(&iface);
+}
+
 TEST(MonitorTest, Mode)
 {
     Monitor monitor("", "");