Implement tri-state in GuiSetBorder

A new UNDECIDED state is used if multiple cells with differing border
settings are selected.

This prevents additional borders to be set without being asked.

Fixes: #10010

src/frontends/qt4/GuiSetBorder.cpp

@@ -72,29 +72,29 @@ void GuiSetBorder::mousePressEvent(QMouseEvent * e)
 	if (e->y() > e->x()) {
 		if (e->y() < height() - e->x()) {
 			if (left_.enabled) {
-				setLeft(!left_.set);
+				setLeft(left_.set == LINE_SET ? LINE_UNSET : LINE_SET);
 				// emit signal
-				leftSet(left_.set);
+				leftSet();
 			}
 		} else {
 			if (bottom_.enabled) {
-				setBottom(!bottom_.set);
+				setBottom(bottom_.set == LINE_SET ? LINE_UNSET : LINE_SET);
 				// emit signal
-				bottomSet(bottom_.set);
+				bottomSet();
 			}
 		}
 	} else {
 		if (e->y() < height() - e->x()) {
 			if (top_.enabled) {
-				setTop(!top_.set);
+				setTop(top_.set == LINE_SET ? LINE_UNSET : LINE_SET);
 				// emit signal
-				topSet(top_.set);
+				topSet();
 			}
 		} else {
 			if (right_.enabled) {
-				setRight(!right_.set);
+				setRight(right_.set == LINE_SET ? LINE_UNSET : LINE_SET);
 				// emit signal
-				rightSet(right_.set);
+				rightSet();
 			}
 		}
 	}
@@ -115,36 +115,84 @@ void GuiSetBorder::drawLine(QColor const & col, int x, int y, int x2, int y2)
 }
 
 
-void GuiSetBorder::drawLeft(bool draw)
+void GuiSetBorder::drawLeft(BorderState draw)
 {
-	QColor col(draw ? Qt::black : Qt::white);
+	QColor col;
+	switch (draw) {
+	case LINE_SET:
+		col = Qt::black;
+		break;
+	case LINE_UNSET:
+		col = Qt::white;
+		break;
+	case LINE_UNDECIDED:
+	case LINE_UNDEF:
+		col = Qt::lightGray;
+		break;
+	}
 	if (!left_.enabled)
 		col = QColor(Qt::lightGray);
 	drawLine(col, m + l, m + l + 2, m + l, h - m - l - 1);
 }
 
 
-void GuiSetBorder::drawRight(bool draw)
+void GuiSetBorder::drawRight(BorderState draw)
 {
-	QColor col(draw ? Qt::black : Qt::white);
+	QColor col;
+	switch (draw) {
+	case LINE_SET:
+		col = Qt::black;
+		break;
+	case LINE_UNSET:
+		col = Qt::white;
+		break;
+	case LINE_UNDECIDED:
+	case LINE_UNDEF:
+		col = Qt::lightGray;
+		break;
+	}
 	if (!right_.enabled)
 		col = QColor(Qt::lightGray);
 	drawLine(col, h - m - l + 1, m + l + 2, h - m - l + 1, h - m - l - 1);
 }
 
 
-void GuiSetBorder::drawTop(bool draw)
+void GuiSetBorder::drawTop(BorderState draw)
 {
-	QColor col(draw ? Qt::black : Qt::white);
+	QColor col;
+	switch (draw) {
+	case LINE_SET:
+		col = Qt::black;
+		break;
+	case LINE_UNSET:
+		col = Qt::white;
+		break;
+	case LINE_UNDECIDED:
+	case LINE_UNDEF:
+		col = Qt::lightGray;
+		break;
+	}
 	if (!top_.enabled)
 		col = QColor(Qt::lightGray);
 	drawLine(col, m + l + 2, m + l, w - m - l - 1, m + l);
 }
 
 
-void GuiSetBorder::drawBottom(bool draw)
+void GuiSetBorder::drawBottom(BorderState draw)
 {
-	QColor col(draw ? Qt::black : Qt::white);
+	QColor col;
+	switch (draw) {
+	case LINE_SET:
+		col = Qt::black;
+		break;
+	case LINE_UNSET:
+		col = Qt::white;
+		break;
+	case LINE_UNDECIDED:
+	case LINE_UNDEF:
+		col = Qt::lightGray;
+		break;
+	}
 	if (!bottom_.enabled)
 		col = QColor(Qt::lightGray);
 	drawLine(col, m + l + 2, w - m - l + 1, w - m - l - 1, w - m - l + 1);
@@ -179,35 +227,35 @@ void GuiSetBorder::setBottomEnabled(bool enabled)
 }
 
 
-void GuiSetBorder::setLeft(bool border)
+void GuiSetBorder::setLeft(BorderState border)
 {
 	left_.set = border;
 	drawLeft(border);
 }
 
 
-void GuiSetBorder::setRight(bool border)
+void GuiSetBorder::setRight(BorderState border)
 {
 	right_.set = border;
 	drawRight(border);
 }
 
 
-void GuiSetBorder::setTop(bool border)
+void GuiSetBorder::setTop(BorderState border)
 {
 	top_.set = border;
 	drawTop(border);
 }
 
 
-void GuiSetBorder::setBottom(bool border)
+void GuiSetBorder::setBottom(BorderState border)
 {
 	bottom_.set = border;
 	drawBottom(border);
 }
 
 
-void GuiSetBorder::setAll(bool border)
+void GuiSetBorder::setAll(BorderState border)
 {
 	setLeft(border);
 	setRight(border);
@@ -216,25 +264,25 @@ void GuiSetBorder::setAll(bool border)
 }
 
 
-bool GuiSetBorder::getLeft()
+GuiSetBorder::BorderState GuiSetBorder::getLeft()
 {
 	return left_.set;
 }
 
 
-bool GuiSetBorder::getRight()
+GuiSetBorder::BorderState GuiSetBorder::getRight()
 {
 	return right_.set;
 }
 
 
-bool GuiSetBorder::getTop()
+GuiSetBorder::BorderState GuiSetBorder::getTop()
 {
 	return top_.set;
 }
 
 
-bool GuiSetBorder::getBottom()
+GuiSetBorder::BorderState GuiSetBorder::getBottom()
 {
 	return bottom_.set;
 }

src/frontends/qt4/GuiSetBorder.h

@@ -28,16 +28,34 @@ class GuiSetBorder : public QWidget
 public:
 	GuiSetBorder(QWidget * parent = 0, Qt::WindowFlags fl = 0);
 
-	bool getLeft();
+	// We need tristate for multi-cell selection
-	bool getRight();
+	enum BorderState {
-	bool getTop();
+		LINE_UNSET,
-	bool getBottom();
+		LINE_SET,
+		LINE_UNDECIDED,
+		LINE_UNDEF
+	};
+
+	BorderState getLeft();
+	BorderState getRight();
+	BorderState getTop();
+	BorderState getBottom();
+
+	bool leftLineSet() { return getLeft() ==  LINE_SET; }
+	bool rightLineSet() { return getRight() ==  LINE_SET; }
+	bool topLineSet() { return getTop() ==  LINE_SET; }
+	bool bottomLineSet() { return getBottom() ==  LINE_SET; }
+
+	bool leftLineUnset() { return getLeft() ==  LINE_UNSET; }
+	bool rightLineUnset() { return getRight() ==  LINE_UNSET; }
+	bool topLineUnset() { return getTop() ==  LINE_UNSET; }
+	bool bottomLineUnset() { return getBottom() ==  LINE_UNSET; }
 
 Q_SIGNALS:
-	void rightSet(bool);
+	void rightSet();
-	void leftSet(bool);
+	void leftSet();
-	void topSet(bool);
+	void topSet();
-	void bottomSet(bool);
+	void bottomSet();
 	void clicked();
 
 public Q_SLOTS:
@@ -45,11 +63,11 @@ public Q_SLOTS:
 	void setRightEnabled(bool);
 	void setTopEnabled(bool);
 	void setBottomEnabled(bool);
-	void setLeft(bool);
+	void setLeft(BorderState);
-	void setRight(bool);
+	void setRight(BorderState);
-	void setTop(bool);
+	void setTop(BorderState);
-	void setBottom(bool);
+	void setBottom(BorderState);
-	void setAll(bool);
+	void setAll(BorderState);
 
 protected:
 	void mousePressEvent(QMouseEvent * e);
@@ -60,15 +78,15 @@ private:
 
 	void drawLine(QColor const & col, int x, int y, int x2, int y2);
 
-	void drawLeft(bool);
+	void drawLeft(BorderState);
-	void drawRight(bool);
+	void drawRight(BorderState);
-	void drawTop(bool);
+	void drawTop(BorderState);
-	void drawBottom(bool);
+	void drawBottom(BorderState);
 
 	class Border {
 	public:
-		Border() : set(true), enabled(true) {}
+		Border() : set(LINE_SET), enabled(true) {}
-		bool set;
+		BorderState set;
 		bool enabled;
 	};
 

src/frontends/qt4/GuiTabular.cpp

@@ -136,13 +136,13 @@ GuiTabular::GuiTabular(QWidget * parent)
 		this, SLOT(checkEnabled()));
 	connect(columnWidthUnitLC, SIGNAL(selectionChanged(lyx::Length::UNIT)),
 		this, SLOT(checkEnabled()));
-	connect(borders, SIGNAL(topSet(bool)),
+	connect(borders, SIGNAL(topSet()),
 		this, SLOT(checkEnabled()));
-	connect(borders, SIGNAL(bottomSet(bool)),
+	connect(borders, SIGNAL(bottomSet()),
 		this, SLOT(checkEnabled()));
-	connect(borders, SIGNAL(rightSet(bool)),
+	connect(borders, SIGNAL(rightSet()),
 		this, SLOT(checkEnabled()));
-	connect(borders, SIGNAL(leftSet(bool)),
+	connect(borders, SIGNAL(leftSet()),
 		this, SLOT(checkEnabled()));
 	connect(rotateTabularCB, SIGNAL(clicked()),
 		this, SLOT(checkEnabled()));
@@ -352,10 +352,10 @@ void GuiTabular::checkEnabled()
 
 void GuiTabular::borderSet_clicked()
 {
-	borders->setTop(true);
+	borders->setTop(GuiSetBorder::LINE_SET);
-	borders->setBottom(true);
+	borders->setBottom(GuiSetBorder::LINE_SET);
-	borders->setLeft(true);
+	borders->setLeft(GuiSetBorder::LINE_SET);
-	borders->setRight(true);
+	borders->setRight(GuiSetBorder::LINE_SET);
 	// repaint the setborder widget
 	borders->update();
 	checkEnabled();
@@ -364,10 +364,10 @@ void GuiTabular::borderSet_clicked()
 
 void GuiTabular::borderUnset_clicked()
 {
-	borders->setTop(false);
+	borders->setTop(GuiSetBorder::LINE_UNSET);
-	borders->setBottom(false);
+	borders->setBottom(GuiSetBorder::LINE_UNSET);
-	borders->setLeft(false);
+	borders->setLeft(GuiSetBorder::LINE_UNSET);
-	borders->setRight(false);
+	borders->setRight(GuiSetBorder::LINE_UNSET);
 	// repaint the setborder widget
 	borders->update();
 	checkEnabled();
@@ -558,21 +558,25 @@ docstring GuiTabular::dialogToParams() const
 	}
 
 	//
-	if (borders->getTop() && borders->getBottom() && borders->getLeft()
+	if (borders->topLineSet() && borders->bottomLineSet() && borders->leftLineSet()
-		&& borders->getRight())
+		&& borders->rightLineSet())
 		setParam(param_str, Tabular::SET_ALL_LINES);
-	else if (!borders->getTop() && !borders->getBottom() && !borders->getLeft()
+	else if (borders->topLineUnset() && borders->bottomLineUnset() && borders->leftLineUnset()
-		&& !borders->getRight())
+		&& borders->rightLineUnset())
 		setParam(param_str, Tabular::UNSET_ALL_LINES);
 	else {
+		if (borders->getLeft() != GuiSetBorder::LINE_UNDECIDED)
 			setParam(param_str, Tabular::SET_LINE_LEFT,
-			 borders->getLeft() ? "true" : "false");
+				 borders->leftLineSet() ? "true" : "false");
+		if (borders->getRight() != GuiSetBorder::LINE_UNDECIDED)
 			setParam(param_str, Tabular::SET_LINE_RIGHT,
-			 borders->getRight() ? "true" : "false");
+				 borders->rightLineSet() ? "true" : "false");
+		if (borders->getTop() != GuiSetBorder::LINE_UNDECIDED)
 			setParam(param_str, Tabular::SET_LINE_TOP,
-			 borders->getTop() ? "true" : "false");
+				 borders->topLineSet() ? "true" : "false");
+		if (borders->getBottom() != GuiSetBorder::LINE_UNDECIDED)
 			setParam(param_str, Tabular::SET_LINE_BOTTOM,
-			 borders->getBottom() ? "true" : "false");
+				 borders->bottomLineSet() ? "true" : "false");
 	}
 
 	// apply the special alignment
@@ -729,6 +733,18 @@ static docstring getAlignSpecial(Tabular const & t, size_t cell, int what)
 }
 
 
+GuiSetBorder::BorderState GuiTabular::borderState(GuiSetBorder::BorderState bs,
+						  bool const line)
+{
+	if (bs == GuiSetBorder::LINE_UNDEF)
+		bs = line ? GuiSetBorder::LINE_SET : GuiSetBorder::LINE_UNSET;
+	else if ((bs == GuiSetBorder::LINE_SET && !line)
+		 || (bs == GuiSetBorder::LINE_UNSET && line))
+		bs = GuiSetBorder::LINE_UNDECIDED;
+	return bs;
+}
+
+
 void GuiTabular::paramsToDialog(Inset const * inset)
 {
 	InsetTabular const * itab = static_cast<InsetTabular const *>(inset);
@@ -768,10 +784,42 @@ void GuiTabular::paramsToDialog(Inset const * inset)
 			rotateTabularAngleSB->setValue(tabular.rotate != 0 ? tabular.rotate : 90);
 	}
 
-	borders->setTop(tabular.topLine(cell));
+	// In what follows, we check the borders of all selected cells,
-	borders->setBottom(tabular.bottomLine(cell));
+	// and if there are diverging settings, we use the LINE_UNDECIDED
-	borders->setLeft(tabular.leftLine(cell));
+	// border status.
-	borders->setRight(tabular.rightLine(cell));
+	GuiSetBorder::BorderState lt = GuiSetBorder::LINE_UNDEF;
+	GuiSetBorder::BorderState lb = GuiSetBorder::LINE_UNDEF;
+	GuiSetBorder::BorderState ll = GuiSetBorder::LINE_UNDEF;
+	GuiSetBorder::BorderState lr = GuiSetBorder::LINE_UNDEF;
+	CursorSlice const & beg = bv->cursor().selBegin();
+	CursorSlice const & end = bv->cursor().selEnd();
+	if (beg != end) {
+		Tabular::col_type cs = tabular.cellColumn(beg.idx());
+		Tabular::col_type ce = tabular.cellColumn(end.idx());
+		if (cs > ce)
+			swap(cs, ce);
+		Tabular::row_type rs = tabular.cellRow(beg.idx());
+		Tabular::row_type re = tabular.cellRow(end.idx());
+		if (rs > re)
+			swap(rs, re);
+		for (Tabular::row_type r = rs; r <= re; ++r)
+			for (Tabular::col_type c = cs; c <= ce; ++c) {
+				idx_type const cc = tabular.cellIndex(r, c);
+				lt = borderState(lt, tabular.topLine(cc));
+				lb = borderState(lb, tabular.bottomLine(cc));
+				ll = borderState(ll, tabular.leftLine(cc));
+				lr = borderState(lr, tabular.rightLine(cc));
+			}
+	} else {
+		lt = tabular.topLine(cell) ? GuiSetBorder::LINE_SET : GuiSetBorder::LINE_UNSET;
+		lb = tabular.bottomLine(cell) ? GuiSetBorder::LINE_SET : GuiSetBorder::LINE_UNSET;
+		ll = tabular.leftLine(cell) ? GuiSetBorder::LINE_SET : GuiSetBorder::LINE_UNSET;
+		lr = tabular.rightLine(cell) ? GuiSetBorder::LINE_SET : GuiSetBorder::LINE_UNSET;
+	}
+	borders->setTop(lt);
+	borders->setBottom(lb);
+	borders->setLeft(ll);
+	borders->setRight(lr);
 	// repaint the setborder widget
 	borders->update();
 

src/frontends/qt4/GuiTabular.h

@@ -62,6 +62,9 @@ private:
 	///
 	bool funcEnabled(Tabular::Feature f) const;
 	///
+	GuiSetBorder::BorderState borderState(GuiSetBorder::BorderState bs,
+					      bool const line);
+	///
 	bool firstheader_suppressable_;
 	///
 	bool lastfooter_suppressable_;