Fix C++20 warning on implicit capture of this via [=]

[lyx.git] / src / graphics / PreviewLoader.h

diff --git a/src/graphics/PreviewLoader.h b/src/graphics/PreviewLoader.h
index 23af0138866b3377b2be1546d4b3556303a66318..272c4d361bd47e133498335d2ffa29f492643266 100644 (file)
--- a/src/graphics/PreviewLoader.h
+++ b/src/graphics/PreviewLoader.h
@@ -18,9 +18,12 @@
 #ifndef PREVIEWLOADER_H
 #define PREVIEWLOADER_H
 
-#include <boost/signal.hpp>
-
 #include "ColorCode.h"
+#include "support/signals.h"
+
+#include <QObject>
+
+#include <memory>
 
 namespace lyx {
 
@@ -30,14 +33,13 @@ namespace graphics {
 
 class PreviewImage;
 
-class PreviewLoader {
+class PreviewLoader : public QObject {
+       Q_OBJECT
 public:
        /** We need buffer because we require the preamble to the
         *  LaTeX file.
         */
        PreviewLoader(Buffer const & buffer);
-       ///
-       ~PreviewLoader();
 
        /** Is there an image already associated with this snippet of LaTeX?
         *  If so, returns a pointer to it, else returns 0.
@@ -74,10 +76,10 @@ public:
         *  has been created and is ready for loading through
         *  lyx::graphics::PreviewImage::image().
         */
-       typedef boost::signal<void(PreviewImage const &)> sig_type;
-       typedef sig_type::slot_type slot_type;
+       typedef signal<void(PreviewImage const &)> sig;
+       typedef sig::slot_type slot;
        ///
-       boost::signals::connection connect(slot_type const &) const;
+       connection connect(slot const &) const;
 
        /** When PreviewImage has finished loading the image file into memory,
         *  it tells the PreviewLoader to tell the outside world
@@ -93,6 +95,10 @@ public:
 
        double displayPixelRatio() const ;
 
+public Q_SLOTS:
+       ///
+       void refreshPreviews();
+
 private:
        /// noncopyable
        PreviewLoader(PreviewLoader const &);
@@ -101,7 +107,7 @@ private:
        /// Use the Pimpl idiom to hide the internals.
        class Impl;
        /// The pointer never changes although *pimpl_'s contents may.
-       Impl * const pimpl_;
+       std::shared_ptr<Impl> const pimpl_;
 };
 
 } // namespace graphics