From: Mikko Rasa <tdb@tdb.fi>
Date: Thu, 17 Nov 2022 22:37:17 +0000 (+0200)
Subject: Keep track of edges in Control
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgui.git;a=commitdiff_plain;h=8b985716894cd5f585a04a6253dd67060abe0b2f

Keep track of edges in Control

This offers a way to reliably tell if a control was actuated for
applications which don't want to use the signal interface.
---

diff --git a/source/input/binarycontrol.cpp b/source/input/binarycontrol.cpp
index b0148cc..09efe40 100644
--- a/source/input/binarycontrol.cpp
+++ b/source/input/binarycontrol.cpp
@@ -34,6 +34,7 @@ void BinaryControl::on_press()
 	if(!state)
 	{
 		state = true;
+		rising_edge = true;
 		signal_press.emit();
 	}
 }
@@ -43,6 +44,7 @@ void BinaryControl::on_release()
 	if(state)
 	{
 		state = false;
+		falling_edge = true;
 		signal_release.emit();
 	}
 }
diff --git a/source/input/binarycontrol.h b/source/input/binarycontrol.h
index 64e4ab1..ff773b8 100644
--- a/source/input/binarycontrol.h
+++ b/source/input/binarycontrol.h
@@ -32,6 +32,8 @@ public:
 	void set_threshold(float);
 
 	bool get_state() const { return state; }
+	bool was_pressed() const { return rising_edge; }
+	bool was_released() const { return falling_edge; }
 
 private:
 	virtual void on_press();
diff --git a/source/input/control.cpp b/source/input/control.cpp
index b2f9bad..3e2398d 100644
--- a/source/input/control.cpp
+++ b/source/input/control.cpp
@@ -39,21 +39,27 @@ std::string ControlSource::str() const
 Control::Control():
 	capture_dev(0),
 	activator(0),
-	origin(0)
+	origin(0),
+	rising_edge(false),
+	falling_edge(false)
 { }
 
 Control::Control(const ControlSource &s):
 	src(s),
 	capture_dev(0),
 	activator(0),
-	origin(0)
+	origin(0),
+	rising_edge(false),
+	falling_edge(false)
 { }
 
 Control::Control(Device &d, ControlSrcType t, unsigned i):
 	src(d, t, i),
 	capture_dev(0),
 	activator(0),
-	origin(0)
+	origin(0),
+	rising_edge(false),
+	falling_edge(false)
 {
 	connect_signals();
 }
@@ -95,6 +101,12 @@ void Control::set_activator(BinaryControl *ctrl)
 	connect_signals();
 }
 
+void Control::reset_edges()
+{
+	rising_edge = false;
+	falling_edge = false;
+}
+
 void Control::connect_signals()
 {
 	switch(src.type)
diff --git a/source/input/control.h b/source/input/control.h
index 450b057..7a4fd0e 100644
--- a/source/input/control.h
+++ b/source/input/control.h
@@ -58,6 +58,8 @@ protected:
 	Device *capture_dev;
 	BinaryControl *activator;
 	float origin;
+	bool rising_edge;
+	bool falling_edge;
 
 	Control();
 	Control(const ControlSource &);
@@ -72,6 +74,9 @@ public:
 	const ControlSource &get_source() const { return src; }
 	void set_activator(BinaryControl *);
 	BinaryControl *get_activator() const { return activator; }
+	bool has_rising_edge() const { return rising_edge; }
+	bool has_falling_edge() const { return falling_edge; }
+	void reset_edges();
 protected:
 	virtual void on_press() = 0;
 	virtual void on_release() = 0;
diff --git a/source/input/smoothcontrol.cpp b/source/input/smoothcontrol.cpp
index 6f4f5a4..3218753 100644
--- a/source/input/smoothcontrol.cpp
+++ b/source/input/smoothcontrol.cpp
@@ -87,6 +87,7 @@ void SmoothControl::on_release()
 
 void SmoothControl::on_motion(float v, float r)
 {
+	float old_value = value;
 	if(v<-dead_zone)
 		value = v+dead_zone;
 	else if(v>dead_zone)
@@ -104,6 +105,11 @@ void SmoothControl::on_motion(float v, float r)
 			value /= threshold-dead_zone;
 	}
 
+	if(value && !old_value)
+		rising_edge = true;
+	else if(!value && old_value)
+		falling_edge = true;
+
 	signal_motion.emit(value);
 
 	if(paired_ctrl && (v>0 || (v==0 && paired_ctrl->value!=0)))