use mvp

Switch from MVC (Model-View-Controller) pattern to a modified MVP (Model-View-Presenter) pattern, to toss out the inconvenient Controller

examples/testbed/framework/presenter.cpp

@@ -0,0 +1,143 @@
+/*
+* Copyright (c) 2016-2016 Irlan Robson http://www.irlan.net
+*
+* This software is provided 'as-is', without any express or implied
+* warranty.  In no event will the authors be held liable for any damages
+* arising from the use of this software.
+* Permission is granted to anyone to use this software for any purpose,
+* including commercial applications, and to alter it and redistribute it
+* freely, subject to the following restrictions:
+* 1. The origin of this software must not be misrepresented; you must not
+* claim that you wrote the original software. If you use this software
+* in a product, an acknowledgment in the product documentation would be
+* appreciated but is not required.
+* 2. Altered source versions must be plainly marked as such, and must not be
+* misrepresented as being the original software.
+* 3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include <testbed/framework/presenter.h>
+#include <testbed/framework/model.h>
+#include <testbed/framework/view.h>
+
+// !
+static inline b3Vec2 GetCursorPosition()
+{
+	extern GLFWwindow* g_window;
+
+	double x, y;
+	glfwGetCursorPos(g_window, &x, &y);
+
+	return b3Vec2(float32(x), float32(y));
+}
+
+Presenter::Presenter(Model* model, View* view)
+{
+	m_model = model;
+	m_view = view;
+}
+
+Presenter::~Presenter()
+{
+
+}
+
+void Presenter::Event_SetWindowSize(float w, float h)
+{
+	m_model->Command_ResizeCamera(w, h);
+}
+
+void Presenter::Event_Press_Key(int button)
+{
+	if (m_view->m_shiftDown)
+	{
+		if (button == GLFW_KEY_DOWN)
+		{
+			m_model->Command_ZoomCamera(1.0f);
+		}
+
+		if (button == GLFW_KEY_UP)
+		{
+			m_model->Command_ZoomCamera(-1.0f);
+		}
+	}
+	else
+	{
+		m_model->Command_Press_Key(button);
+	}
+}
+
+void Presenter::Event_Release_Key(int button)
+{
+	if (!m_view->m_shiftDown)
+	{
+		m_model->Command_Release_Key(button);
+	}
+}
+
+void Presenter::Event_Press_Mouse(int button)
+{
+	if (button == GLFW_MOUSE_BUTTON_LEFT)
+	{
+		if (!m_view->m_shiftDown)
+		{
+			m_model->Command_Press_Mouse_Left(GetCursorPosition());
+		}
+	}
+}
+
+void Presenter::Event_Release_Mouse(int button)
+{
+	if (button == GLFW_MOUSE_BUTTON_LEFT)
+	{
+		if (!m_view->m_shiftDown)
+		{
+			m_model->Command_Release_Mouse_Left(GetCursorPosition());
+		}
+	}
+}
+
+void Presenter::Event_Move_Cursor(float x, float y)
+{
+	b3Vec2 ps;
+	ps.Set(x, y);
+
+	b3Vec2 dp = ps - m_view->m_ps0;
+
+	float32 ndx = b3Clamp(dp.x, -1.0f, 1.0f);
+	float32 ndy = b3Clamp(dp.y, -1.0f, 1.0f);
+
+	if (m_view->m_shiftDown)
+	{
+		if (m_view->m_leftDown)
+		{
+			float32 ax = -0.005f * B3_PI * ndx;
+			float32 ay = -0.005f * B3_PI * ndy;
+
+			m_model->Command_RotateCameraY(ax);
+			m_model->Command_RotateCameraX(ay);
+		}
+
+		if (m_view->m_rightDown)
+		{
+			float32 tx = 0.2f * ndx;
+			float32 ty = -0.2f * ndy;
+
+			m_model->Command_TranslateCameraX(tx);
+			m_model->Command_TranslateCameraY(ty);
+		}
+	}
+	else
+	{
+		m_model->Command_Move_Cursor(GetCursorPosition());
+	}
+}
+
+void Presenter::Event_Scroll(float dx, float dy)
+{
+	if (m_view->m_shiftDown)
+	{
+		float32 ny = b3Clamp(dy, -1.0f, 1.0f);
+		m_model->Command_ZoomCamera(1.0f * ny);
+	}
+}