Add keyboard input and model info keybind

Pressing 'i' will show a dialog box with the model info

CMakeLists.txt

@@ -70,6 +70,7 @@ add_executable( fc2d
 	src/error.cpp
 	src/eye.cpp
 	src/configfile.cpp
+	src/input.cpp
 	packaging/fc2d.rc
 )
 target_link_libraries( fc2d ${OpenCV_LIBS} ${OPENGL_LIBRARIES} ${WEBP_LIBRARIES}

src/graphics.cpp

@@ -23,6 +23,12 @@
 #include <cv.hpp>
 #include <args.hpp>
 #include <error.hpp>
+#include <input.hpp>
+
+#ifndef NO_GRAPHICAL_DIALOG
+#include <boxer/boxer.h>
+#endif
+
 
 GLuint shader;	//standard shader program used for all elements
 GLuint transUniform;	//location of the "transMatrix" transformation matrix uniform in the shader
@@ -98,6 +104,9 @@ void initGraphics () {
 	glutInitWindowSize(512, 512);
 	glutCreateWindow(PROJECT_NAME);
 
+	// input callback
+	glutKeyboardFunc(keyInput);
+
 	glewExperimental = GL_TRUE;
 	glewInit();
 
@@ -237,3 +246,7 @@ void updateModel(struct FaceData faceData) {
 	//tell FreeGLUT to schedule a screen update
 	glutPostRedisplay();
 }
+
+void showModelInfo() {
+	boxer::show(model->getInfoString().c_str(), "Model info", boxer::Style::Info);
+}

src/graphics.hpp

@@ -10,6 +10,8 @@
 #include <glm/vec2.hpp>
 
 #include <cv.hpp>
+#include <model.hpp>
+#include <modelpart.hpp>
 
 extern GLuint transUniform;
 extern float windowAspectRatio;
@@ -28,4 +30,6 @@ void printShaderCompileLog(GLuint shader);
 
 void updateModel(struct FaceData faceData);
 
+void showModelInfo();
+
 #endif

src/input.cpp

@@ -0,0 +1,12 @@
+#include <input.hpp>
+#include <graphics.hpp>
+
+void keyInput(unsigned char key, int x, int y) {
+	switch(key) {
+		case 'i':	// model info
+			showModelInfo();
+			break;
+		default:
+			break;
+	}
+}

src/input.hpp

@@ -0,0 +1,6 @@
+#ifndef INPUT_HPP
+#define INPUT_HPP
+
+void keyInput(unsigned char key, int x, int y);
+
+#endif