From 214470fc17e73bbf4664f4c1678a7dd30c905bf2 Mon Sep 17 00:00:00 2001
From: Joel Holdsworth <joel@airwebreathe.org.uk>
Date: Mon, 31 Aug 2015 20:13:08 -0600
Subject: [PATCH] Signal: Added scale_handle_offset, scale_handle_dragged and
 scale_handle_released

---
 pv/view/analogsignal.cpp | 10 ++++++++++
 pv/view/analogsignal.hpp | 11 +++++++++++
 pv/view/logicsignal.cpp  | 10 ++++++++++
 pv/view/logicsignal.hpp  | 11 +++++++++++
 pv/view/signal.hpp       | 16 ++++++++++++++++
 5 files changed, 58 insertions(+)

diff --git a/pv/view/analogsignal.cpp b/pv/view/analogsignal.cpp
index efde294..df1edcf 100644
--- a/pv/view/analogsignal.cpp
+++ b/pv/view/analogsignal.cpp
@@ -82,6 +82,16 @@ std::pair<int, int> AnalogSignal::v_extents() const
 	return make_pair(-NominalHeight / 2, NominalHeight / 2);
 }
 
+int AnalogSignal::scale_handle_offset() const
+{
+	return -NominalHeight / 3;
+}
+
+void AnalogSignal::scale_handle_dragged(int offset)
+{
+	(void)offset;
+}
+
 void AnalogSignal::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 {
 	if (channel_->enabled())
diff --git a/pv/view/analogsignal.hpp b/pv/view/analogsignal.hpp
index 72ff23b..58c2d3c 100644
--- a/pv/view/analogsignal.hpp
+++ b/pv/view/analogsignal.hpp
@@ -59,6 +59,17 @@ public:
 	 */
 	std::pair<int, int> v_extents() const;
 
+	/**
+	 * Returns the offset to show the drag handle.
+	 */
+	int scale_handle_offset() const;
+
+	/**
+	 * Handles the scale handle being dragged to an offset.
+	 * @param offset the offset the scale handle was dragged to.
+	 */
+	void scale_handle_dragged(int offset);
+
 	/**
 	 * Paints the background layer of the signal with a QPainter
 	 * @param p the QPainter to paint into.
diff --git a/pv/view/logicsignal.cpp b/pv/view/logicsignal.cpp
index d529cab..573d1b7 100644
--- a/pv/view/logicsignal.cpp
+++ b/pv/view/logicsignal.cpp
@@ -150,6 +150,16 @@ std::pair<int, int> LogicSignal::v_extents() const
 	return make_pair(-SignalHeight - SignalMargin, SignalMargin);
 }
 
+int LogicSignal::scale_handle_offset() const
+{
+	return SignalHeight;
+}
+
+void LogicSignal::scale_handle_dragged(int offset)
+{
+	(void)offset;
+}
+
 void LogicSignal::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 {
 	if (channel_->enabled())
diff --git a/pv/view/logicsignal.hpp b/pv/view/logicsignal.hpp
index 0705613..71dcc03 100644
--- a/pv/view/logicsignal.hpp
+++ b/pv/view/logicsignal.hpp
@@ -86,6 +86,17 @@ public:
 	 */
 	std::pair<int, int> v_extents() const;
 
+	/**
+	 * Returns the offset to show the drag handle.
+	 */
+	int scale_handle_offset() const;
+
+	/**
+	 * Handles the scale handle being dragged to an offset.
+	 * @param offset the offset the scale handle was dragged to.
+	 */
+	void scale_handle_dragged(int offset);
+
 	/**
 	 * Paints the background layer of the signal with a QPainter
 	 * @param p the QPainter to paint into.
diff --git a/pv/view/signal.hpp b/pv/view/signal.hpp
index d96a85c..714b44f 100644
--- a/pv/view/signal.hpp
+++ b/pv/view/signal.hpp
@@ -81,6 +81,22 @@ public:
 
 	void delete_pressed();
 
+	/**
+	 * Returns the offset to show the drag handle.
+	 */
+	virtual int scale_handle_offset() const = 0;
+
+	/**
+	 * Handles the scale handle being dragged to an offset.
+	 * @param offset the offset the scale handle was dragged to.
+	 */
+	virtual void scale_handle_dragged(int offset) = 0;
+
+	/**
+	 * Handles the scale handle being being released.
+	 */
+	virtual void scale_handle_released() {};
+
 private Q_SLOTS:
 	void on_disable();
 
-- 
2.30.2