From 72569c42ba850faf87b68dc738a7b283c6dad4ee Mon Sep 17 00:00:00 2001
From: Vincent van Ravesteijn <vfr@lyx.org>
Date: Sun, 24 Oct 2010 19:25:36 +0000
Subject: [PATCH] Implement mouse hovering for InsetExternal.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@35803 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/insets/InsetExternal.cpp | 16 ++++++++++++++++
 src/insets/InsetExternal.h   |  4 ++++
 2 files changed, 20 insertions(+)

diff --git a/src/insets/InsetExternal.cpp b/src/insets/InsetExternal.cpp
index 7225da7472..426aee5891 100644
--- a/src/insets/InsetExternal.cpp
+++ b/src/insets/InsetExternal.cpp
@@ -371,6 +371,7 @@ InsetExternal::InsetExternal(Buffer * buf)
 }
 
 
+// Mouse hover is not copied and remains empty
 InsetExternal::InsetExternal(InsetExternal const & other)
 	: Inset(other),
 	  boost::signals::trackable(),
@@ -382,6 +383,19 @@ InsetExternal::InsetExternal(InsetExternal const & other)
 InsetExternal::~InsetExternal()
 {
 	hideDialogs("external", this);
+
+	map<BufferView const *, bool>::iterator it = mouse_hover_.begin();
+	map<BufferView const *, bool>::iterator end = mouse_hover_.end();
+	for (; it != end; ++it)
+		if (it->second)
+			it->first->clearLastInset(this);
+}
+
+
+bool InsetExternal::setMouseHover(BufferView const * bv, bool mouse_hover)
+{
+	mouse_hover_[bv] = mouse_hover;
+	return true;
 }
 
 
@@ -454,6 +468,8 @@ void InsetExternal::metrics(MetricsInfo & mi, Dimension & dim) const
 
 void InsetExternal::draw(PainterInfo & pi, int x, int y) const
 {
+	if (renderer_->asButton())
+		renderer_->setRenderState(mouse_hover_[pi.base.bv]);
 	renderer_->draw(pi, x, y);
 }
 
diff --git a/src/insets/InsetExternal.h b/src/insets/InsetExternal.h
index 22c909b0e2..d5a2bc8feb 100644
--- a/src/insets/InsetExternal.h
+++ b/src/insets/InsetExternal.h
@@ -113,6 +113,8 @@ public:
 	int latex(odocstream &, OutputParams const &) const;
 	///
 	docstring contextMenu(BufferView const & bv, int x, int y) const;
+	///
+	bool setMouseHover(BufferView const * bv, bool mouse_hover);
 
 private:
 	///
@@ -161,6 +163,8 @@ private:
 	InsetExternalParams params_;
 	/// The thing that actually draws the image on LyX's screen.
 	boost::scoped_ptr<RenderBase> renderer_;
+	/// changes color of the button when mouse enters/leaves this inset
+	mutable std::map<BufferView const *, bool> mouse_hover_;
 };
 
 } // namespace lyx
-- 
2.39.5