Fix for bug 3524: Indent checkbox is enabled even when paragraphs are marked

with skips.

Added helper method canIndent() to controller and appropriate logic to
QParagraph::update_contents().



git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@18236 a592a061-630c-0410-9148-cb99ea01b6c8

src/frontends/controllers/ControlParagraph.cpp

@@ -12,6 +12,8 @@
 #include <config.h>
 
 #include "ControlParagraph.h"
+#include "Buffer.h"
+#include "BufferParams.h"
 #include "ButtonController.h"
 #include "FuncRequest.h"
 #include "Lexer.h"
@@ -153,6 +155,11 @@ bool ControlParagraph::inInset() const
 	return ininset_;
 }
 
+bool ControlParagraph::canIndent() const
+{
+	return kernel().buffer().params().paragraph_separation == 
+		BufferParams::PARSEP_INDENT;
+}
 
 LyXAlignment ControlParagraph::alignPossible() const
 {

src/frontends/controllers/ControlParagraph.h

@@ -40,6 +40,8 @@ public:
 	///
 	bool inInset() const;
 	///
+	bool canIndent() const;
+	///
 	LyXAlignment alignPossible() const;
 	///
 	LyXAlignment alignDefault() const;

src/frontends/qt4/QParagraph.cpp

@@ -254,7 +254,9 @@ void QParagraph::update_contents()
 	dialog_->alignmentToRadioButtons(newAlignment);
 
 	//indentation
-	dialog_->indentCB->setChecked(!params.noindent());
+	bool const canindent = controller().canIndent();
+	dialog_->indentCB->setEnabled(canindent);
+	dialog_->indentCB->setChecked(canindent && !params.noindent());
 
 	// linespacing
 	int linespacing;