Basic gamepad input

src/InputController.cpp

@@ -22,6 +22,7 @@ struct MouseState {
 
 struct MouseState mouse_state;
 struct GamePadState game_pad_state;
+static GLFWgamepadstate last_glfw_gamepad_state;
 
 static int m_width = 1, m_height = 1;
 
@@ -130,6 +131,30 @@ void InputController::handle_gamepad_event(GLFWgamepadstate* gamepad) {
         SET_GAME_PAD_STATE(X_FLAG, GLFW_GAMEPAD_BUTTON_X);
         SET_GAME_PAD_STATE(Y_FLAG, GLFW_GAMEPAD_BUTTON_Y);
     }
+    
+    // Send to nanogui
+    if (gamepad->buttons != last_glfw_gamepad_state.buttons) {
+        for (int j = 0; j <= GLFW_GAMEPAD_BUTTON_LAST; j++) {
+            if (gamepad->buttons[j] == last_glfw_gamepad_state.buttons[j]) {
+                continue;
+            }
+            
+            nanogui::gamepad_button_callback_event(0, j, gamepad->buttons[j]);
+        }
+    }
+    
+    if (gamepad->axes != last_glfw_gamepad_state.axes) {
+        for (int j = 0; j <= GLFW_GAMEPAD_AXIS_LAST; j++) {
+            if (gamepad->axes[j] == last_glfw_gamepad_state.axes[j]) {
+                continue;
+            }
+            
+            nanogui::gamepad_analog_callback_event(0, j, gamepad->axes[j]);
+        }
+    }
+    
+    last_glfw_gamepad_state = *gamepad;
+
 }
 
 void InputController::handle_rumple(unsigned short low_freq_motor, unsigned short high_freq_motor) {

src/ui/Application.cpp

@@ -62,9 +62,21 @@ void Application::pop_window() {
         m_windows.back()->set_visible(true);
         update_focus(m_windows.back());
         perform_layout();
-    }
         
         if (auto w = static_cast<ContentWindow *>(m_windows.front())) {
             w->window_appear();
         }
+    }
+}
+
+void Application::gamepad_button_callback_event(int jid, int button, int action) {
+    if (!m_windows.empty()) {
+        m_windows.back()->gamepad_button_event(jid, button, action);
+    }
+}
+
+void Application::gamepad_analog_callback_event(int jid, int axis, float value) {
+    if (!m_windows.empty()) {
+        m_windows.back()->gamepad_analog_event(jid, axis, value);
+    }
 }

src/ui/Application.hpp

@@ -18,6 +18,9 @@ public:
     
     void pop_window();
     
+    void gamepad_button_callback_event(int jid, int button, int action) override;
+    void gamepad_analog_callback_event(int jid, int axis, float value) override;
+    
 private:
     std::vector<Widget *> m_windows;
 };

src/ui/windows/ContentWindow.cpp

@@ -1,6 +1,8 @@
 #include "ContentWindow.hpp"
 #include "Application.hpp"
+#include "LoadingOverlay.hpp"
 #include "nanovg.h"
+#include <nanogui/opengl.h>
 
 using namespace nanogui;
 
@@ -74,3 +76,138 @@ void ContentWindow::set_right_title_button(int icon, const std::function<void()>
     });
     perform_layout();
 }
+
+static inline std::vector<Widget *> selectables_child_recursive(Widget *widget) {
+    std::vector<Widget *> selectables;
+    
+    for (auto child: widget->children()) {
+        if (child->selectable()) {
+            selectables.push_back(child);
+        }
+        auto child_selectables = selectables_child_recursive(child);
+        selectables.insert(selectables.end(), child_selectables.begin(), child_selectables.end());
+    }
+    return selectables;
+}
+
+static inline Widget *most_closed_widget(Widget *target, std::vector<Widget *> widgets, bool left, bool right, bool up, bool down) {
+    if (widgets.size() < 2) {
+        return nullptr;
+    }
+    
+    int index = -1;
+    int distanse = std::numeric_limits<int>::max();
+    
+    for (int i = 0; i < widgets.size(); i++) {
+        auto widget = widgets[i];
+        
+        if (widget == target) {
+            continue;
+        }
+        
+        if (left && widget->center().y() == target->center().y() && widget->center().x() < target->center().x()) {
+            int new_distanse = target->center().x() - widget->center().x();
+            if (new_distanse < distanse) {
+                distanse = new_distanse;
+                index = i;
+            }
+        } else if (right && widget->center().y() == target->center().y() && widget->center().x() > target->center().x()) {
+            int new_distanse = widget->center().x() - target->center().x();
+            if (new_distanse < distanse) {
+                distanse = new_distanse;
+                index = i;
+            }
+        } else if (up && widget->center().x() == target->center().x() && widget->center().y() < target->center().y()) {
+            int new_distanse = target->center().y() - widget->center().y();
+            if (new_distanse < distanse) {
+                distanse = new_distanse;
+                index = i;
+            }
+        } else if (down && widget->center().x() == target->center().x() && widget->center().y() > target->center().y()) {
+            int new_distanse = widget->center().y() - target->center().y();
+            if (new_distanse < distanse) {
+                distanse = new_distanse;
+                index = i;
+            }
+        }
+    }
+    
+    if (index != -1) {
+        return widgets[index];
+    }
+    return nullptr;
+}
+
+bool ContentWindow::gamepad_button_event(int jid, int button, int action) {
+    if (!action) {
+        return false;
+    }
+    
+    std::vector<MessageDialog *> messages;
+    std::vector<LoadingOverlay *> loaders;
+    
+    for (auto child: screen()->children()) {
+        if (auto message = dynamic_cast<MessageDialog *>(child)) {
+            messages.push_back(message);
+        }
+        if (auto loader = dynamic_cast<LoadingOverlay *>(child)) {
+            loaders.push_back(loader);
+        }
+    }
+    
+    bool handle_button = messages.empty() && loaders.empty();
+    
+    if (button == NANOGUI_GAMEPAD_BUTTON_B) {
+        if (!messages.empty()) {
+            for (auto message: messages) {
+                message->dispose();
+            }
+            return false;
+        }
+        
+        if (!loaders.empty()) {
+            return false;
+        }
+        
+        pop();
+        return false;
+    } else if (handle_button && button == NANOGUI_GAMEPAD_BUTTON_A) {
+        auto selectables = selectables_child_recursive(m_container);
+        auto current = std::find_if(selectables.begin(), selectables.end(), [](auto c) { return c->selected(); });
+        
+        if (current != selectables.end()) {
+            auto widget = *current;
+            widget->mouse_button_event(widget->position() + widget->size() / 2, NANOGUI_MOUSE_BUTTON_1, 1, 0);
+            widget->mouse_button_event(widget->position() + widget->size() / 2, NANOGUI_MOUSE_BUTTON_1, 0, 0);
+        }
+        return false;
+    }
+    
+    auto selectables = selectables_child_recursive(m_container);
+    auto current = std::find_if(selectables.begin(), selectables.end(), [](auto c) { return c->selected(); });
+    
+    if (handle_button && button >= NANOGUI_GAMEPAD_BUTTON_DPAD_UP && button <= NANOGUI_GAMEPAD_BUTTON_DPAD_LEFT) {
+        if (current == selectables.end()) {
+            selectables.front()->set_selected(true);
+            return false;
+        }
+        
+        auto current_selectable = *current;
+        auto new_selectable = most_closed_widget(
+            current_selectable,
+            selectables,
+            button == NANOGUI_GAMEPAD_BUTTON_DPAD_LEFT,
+            button == NANOGUI_GAMEPAD_BUTTON_DPAD_RIGHT,
+            button == NANOGUI_GAMEPAD_BUTTON_DPAD_UP,
+            button == NANOGUI_GAMEPAD_BUTTON_DPAD_DOWN
+            );
+        
+        if (new_selectable) {
+            current_selectable->set_selected(false);
+            new_selectable->set_selected(true);
+            
+            m_scroll->set_scroll((new_selectable->position().y() + new_selectable->height()) / m_scroll->height());
+        }
+    }
+    return false;
+}

src/ui/windows/ContentWindow.hpp

@@ -53,6 +53,8 @@ public:
         return true;
     };
     
+    bool gamepad_button_event(int jid, int button, int action) override;
+    
 private:
     Application* application() {
         auto application = static_cast<Application *>(screen());

third_party/nanogui

@@ -1 +1 @@
-Subproject commit ec772a923595c1d4b08156fcbf8f4631871dd642
+Subproject commit 45d1e7539dcade92040ec406f063c73b3cdfae13