From 96a81e3ea484f4e38117f2aa2eafdcfb4ca1cbba Mon Sep 17 00:00:00 2001
From: Ingo Ruhnke <grumbel@gmail.com>
Date: Mon, 25 Aug 2014 06:46:34 +0200
Subject: [PATCH] Added mouse support to the Dialog class

---
 src/gui/dialog.cpp       | 73 +++++++++++++++++++++++++++++++++++++++-
 src/gui/dialog.hpp       |  5 ++-
 src/gui/menu_manager.cpp | 17 +++++++---
 3 files changed, 88 insertions(+), 7 deletions(-)

diff --git a/src/gui/dialog.cpp b/src/gui/dialog.cpp
index c3b200075c3..cd56c40a8de 100644
--- a/src/gui/dialog.cpp
+++ b/src/gui/dialog.cpp
@@ -18,8 +18,11 @@
 
 #include "control/controller.hpp"
 #include "gui/menu_manager.hpp"
+#include "gui/mousecursor.hpp"
 #include "supertux/resources.hpp"
 #include "video/drawing_context.hpp"
+#include "video/renderer.hpp"
+#include "video/video_system.hpp"
 
 Dialog::Dialog() :
   m_text(),
@@ -54,6 +57,74 @@ Dialog::add_button(const std::string& text, const std::function<void ()>& callba
   }
 }
 
+int
+Dialog::get_button_at(const Vector& mouse_pos) const
+{
+  Rectf bg_rect(Vector(SCREEN_WIDTH/2 - m_text_size.width/2,
+                       SCREEN_HEIGHT/2 - m_text_size.height/2),
+                Sizef(m_text_size.width,
+                      m_text_size.height + 44));
+
+  for(int i = 0; i < static_cast<int>(m_buttons.size()); ++i)
+  {
+    float segment_width = bg_rect.get_width() / m_buttons.size();
+    float button_width = segment_width;
+    float button_height = 24.0f;
+    Vector pos(bg_rect.p1.x + segment_width/2.0f + i * segment_width,
+               bg_rect.p2.y - 12);
+    Rectf button_rect(Vector(pos.x - button_width/2, pos.y - button_height/2),
+                      Vector(pos.x + button_width/2, pos.y + button_height/2));
+    if (button_rect.contains(mouse_pos))
+    {
+      return i;
+    }
+  }
+  return -1;
+}
+
+void
+Dialog::event(const SDL_Event& ev)
+{
+  switch(ev.type) {
+    case SDL_MOUSEBUTTONDOWN:
+    if(ev.button.button == SDL_BUTTON_LEFT)
+    {
+      Vector mouse_pos = VideoSystem::current()->get_renderer().to_logical(ev.motion.x, ev.motion.y);
+      int new_button = get_button_at(mouse_pos);
+      if (new_button != -1)
+      {
+        m_selected_button = new_button;
+        on_button_click(m_selected_button);
+
+        // warning: this will "delete this"
+        MenuManager::instance().set_dialog({});
+      }
+    }
+    break;
+
+    case SDL_MOUSEMOTION:
+    {
+      Vector mouse_pos = VideoSystem::current()->get_renderer().to_logical(ev.motion.x, ev.motion.y);
+      int new_button = get_button_at(mouse_pos);
+      if (new_button != -1)
+      {
+        m_selected_button = new_button;
+        if(MouseCursor::current())
+          MouseCursor::current()->set_state(MC_LINK);
+      }
+      else
+      {
+        if(MouseCursor::current())
+          MouseCursor::current()->set_state(MC_NORMAL);
+      }
+    }
+    break;
+
+    default:
+      break;
+  }
+}
+
 void
 Dialog::process_input(const Controller& controller)
 {
@@ -143,7 +214,7 @@ Dialog::draw(DrawingContext& ctx)
 }
 
 void
-Dialog::on_button_click(int button)
+Dialog::on_button_click(int button) const
 {
   if (m_buttons[button].callback)
   {
diff --git a/src/gui/dialog.hpp b/src/gui/dialog.hpp
index e7965555258..736614188de 100644
--- a/src/gui/dialog.hpp
+++ b/src/gui/dialog.hpp
@@ -17,6 +17,7 @@
 #ifndef HEADER_SUPERTUX_GUI_DIALOG_HPP
 #define HEADER_SUPERTUX_GUI_DIALOG_HPP
 
+#include <SDL.h>
 #include <functional>
 #include <string>
 #include <vector>
@@ -49,11 +50,13 @@ class Dialog
   void add_button(const std::string& text, const std::function<void ()>& callback = {},
                   bool focus = false);
 
+  void event(const SDL_Event& event);
   void process_input(const Controller& controller);
   void draw(DrawingContext& context);
 
 private:
-  void on_button_click(int button);
+  void on_button_click(int button) const;
+  int get_button_at(const Vector& pos) const;
 
 private:
   Dialog(const Dialog&) = delete;
diff --git a/src/gui/menu_manager.cpp b/src/gui/menu_manager.cpp
index e69aa5941d4..1bd6330aae3 100644
--- a/src/gui/menu_manager.cpp
+++ b/src/gui/menu_manager.cpp
@@ -170,13 +170,20 @@ MenuManager::process_input()
 }
 
 void
-MenuManager::event(const SDL_Event& event_)
+MenuManager::event(const SDL_Event& ev)
 {
-  if (current_menu() && !m_transition->is_active())
+  if (!m_transition->is_active())
   {
-    // only pass events when the menu is fully visible and not in a
-    // transition animation
-    current_menu()->event(event_);
+    if (m_dialog)
+    {
+      m_dialog->event(ev);
+    }
+    else if (current_menu())
+    {
+      // only pass events when the menu is fully visible and not in a
+      // transition animation
+      current_menu()->event(ev);
+    }
   }
 }