Add a gesture detector input device

[libs/gui.git] / source / input / device.h

diff --git a/source/input/device.h b/source/input/device.h
index 43d180d50b6595696f1767f490c48d3c0863a178..7df388b18c34f5f0d2dc1001ac61e27ae5b9afa8 100644 (file)
--- a/source/input/device.h
+++ b/source/input/device.h
@@ -1,5 +1,5 @@
-#ifndef MSP_GBASE_INPUTDEVICE_H_
-#define MSP_GBASE_INPUTDEVICE_H_
+#ifndef MSP_INPUT_INPUTDEVICE_H_
+#define MSP_INPUT_INPUTDEVICE_H_
 
 #include <string>
 #include <vector>
@@ -11,25 +11,43 @@ namespace Input {
 /**
 Base class for input devices.  Input devices have two types of controls:
 buttons and axes.  Buttons are either on or off.  Axes have a floating point
-value in the range [-1, 1].
+value nominally in the range [-1, 1].
+
+Event handlers return a boolean indicating whether the event is considered
+processed.  If a handler returns true, no further handlers are invoked.
 */
 class Device
 {
+protected:
+       struct EventAccumulator
+       {
+               typedef void result_type;
+
+               template<typename Iter>
+               result_type operator()(Iter begin, Iter end) const
+               {
+                       for(Iter i=begin; i!=end; ++i)
+                               if(*i)
+                                       return;
+               }
+       };
+
 public:
-       sigc::signal<void, unsigned> signal_button_press;
-       sigc::signal<void, unsigned> signal_button_release;
-       sigc::signal<void, unsigned, float, float> signal_axis_motion;
+       sigc::signal<bool, unsigned>::accumulated<EventAccumulator> signal_button_press;
+       sigc::signal<bool, unsigned>::accumulated<EventAccumulator> signal_button_release;
+       sigc::signal<bool, unsigned, float, float>::accumulated<EventAccumulator> signal_axis_motion;
 
 protected:
        std::string name;
-       std::vector<char>  buttons;
+       std::vector<char> buttons;
        std::vector<float> axes;
 
-       Device() { }
+       Device();
 public:
-       virtual ~Device() { }
+       virtual ~Device();
+
        const std::string &get_name() const { return name; }
-       bool  get_button_state(unsigned) const;
+       bool get_button_state(unsigned) const;
        float get_axis_value(unsigned) const;
 
        virtual std::string get_button_name(unsigned) const;