From fd3a41e035a44a66a3adcb9fa0f970f32e9d260c Mon Sep 17 00:00:00 2001
From: Jean-Marc Lasgouttes <lasgouttes@lyx.org>
Date: Tue, 2 Feb 2016 17:07:29 +0100
Subject: [PATCH] Change mouse cursor on tabular selection zones

This is done by implementing the clickable method. It is not possible yet to have the usual left and down arrows, because Qt does not implement them as far as I can see.

Factor the code that triggers row/column selection and fix the logic. Now it is possible to select also at the right of the tabular inset.
---
 src/insets/InsetTabular.cpp | 30 +++++++++++++++++++++++++-----
 src/insets/InsetTabular.h   |  7 +++++++
 2 files changed, 32 insertions(+), 5 deletions(-)

diff --git a/src/insets/InsetTabular.cpp b/src/insets/InsetTabular.cpp
index 4f94c8333f..7323560b55 100644
--- a/src/insets/InsetTabular.cpp
+++ b/src/insets/InsetTabular.cpp
@@ -3951,6 +3951,29 @@ void InsetTabular::addToToc(DocIterator const & cpit, bool output_active,
 }
 
 
+bool InsetTabular::hitSelectRow(BufferView const & bv, int x) const
+{
+	int const x0 = xo(bv) + ADD_TO_TABULAR_WIDTH;
+	return x < x0 || x > x0 + tabular.width();
+}
+
+
+bool InsetTabular::hitSelectColumn(BufferView const & bv, int y) const
+{
+	int const y0 = yo(bv) - tabular.rowAscent(0) + offset_valign_;
+	// FIXME: using ADD_TO_TABULAR_WIDTH is not really correct since
+	// there is no margin added vertically to tabular insets.
+	// Howerver, it works for now.
+	return y < y0 + ADD_TO_TABULAR_WIDTH || y > y0 + tabular.height() - ADD_TO_TABULAR_WIDTH;
+}
+
+
+bool InsetTabular::clickable(BufferView const & bv, int x, int y) const
+{
+	return hitSelectRow(bv, x) || hitSelectColumn(bv, y);
+}
+
+
 void InsetTabular::doDispatch(Cursor & cur, FuncRequest & cmd)
 {
 	LYXERR(Debug::DEBUG, "# InsetTabular::doDispatch: cmd: " << cmd
@@ -3965,8 +3988,7 @@ void InsetTabular::doDispatch(Cursor & cur, FuncRequest & cmd)
 	case LFUN_MOUSE_PRESS: {
 		//lyxerr << "# InsetTabular::MousePress\n" << cur.bv().cursor() << endl;
 		// select row
-		if (cmd.x() < xo(cur.bv()) + ADD_TO_TABULAR_WIDTH
-			|| cmd.x() > xo(cur.bv()) + tabular.width()) {
+		if (hitSelectRow(cur.bv(), cmd.x())) {
 			row_type r = rowFromY(cur, cmd.y());
 			cur.idx() = tabular.getFirstCellInRow(r);
 			cur.pit() = 0;
@@ -3981,9 +4003,7 @@ void InsetTabular::doDispatch(Cursor & cur, FuncRequest & cmd)
 			break;
 		}
 		// select column
-		int const y0 = yo(cur.bv()) - tabular.rowAscent(0) + offset_valign_;
-		if (cmd.y() < y0 + ADD_TO_TABULAR_WIDTH
-			|| cmd.y() > y0 + tabular.height()) {
+		if (hitSelectColumn(cur.bv(), cmd.y())) {
 			col_type c = columnFromX(cur, cmd.x());
 			cur.idx() = tabular.cellIndex(0, c);
 			cur.pit() = 0;
diff --git a/src/insets/InsetTabular.h b/src/insets/InsetTabular.h
index de664f15be..6b60e44acb 100644
--- a/src/insets/InsetTabular.h
+++ b/src/insets/InsetTabular.h
@@ -1003,6 +1003,13 @@ private:
 	///
 	Inset * clone() const { return new InsetTabular(*this); }
 
+	///
+	bool hitSelectRow(BufferView const & bv, int x) const;
+	///
+	bool hitSelectColumn(BufferView const & bv, int y) const;
+	///	Returns true if coordinates are on row/column selection zones
+	bool clickable(BufferView const &, int x, int y) const;
+
 	///
 	void drawCellLines(PainterInfo &, int x, int y, row_type row,
 			   idx_type cell) const;
-- 
2.39.2