X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Fgraphics%2FPreviewLoader.h;h=3239ffcf173c466f810b66a5ca6890ab4ec92d55;hb=f6d4bce12303a2f30ea129ee86e7f7d879668260;hp=1270a59ea921abf86b97f2bf2b4b34de57d196c4;hpb=a674f70d4a013e69a88343e5b6d13357d8a33493;p=lyx.git

diff --git a/src/graphics/PreviewLoader.h b/src/graphics/PreviewLoader.h
index 1270a59ea9..3239ffcf17 100644
--- a/src/graphics/PreviewLoader.h
+++ b/src/graphics/PreviewLoader.h
@@ -1,37 +1,38 @@
 // -*- C++ -*-
 /**
- *  \file PreviewLoader.h
- *  Copyright 2002 the LyX Team
- *  Read the file COPYING
+ * \file PreviewLoader.h
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
  *
- * \author Angus Leeming <leeming@lyx.org>
+ * \author Angus Leeming
  *
- *  grfx::PreviewLoader collects latex snippets together. Then, on a
- *  startLoading() call, these are dumped to file and processed, converting
- *  each snippet to a separate bitmap image file. Once a bitmap file is ready
- *  to be loaded back into LyX, the PreviewLoader emits a readyToDisplay signal
- *  to inform the initiating process.
+ * Full author contact details are available in file CREDITS.
+ *
+ * graphics::PreviewLoader collects latex snippets together. Then, on a
+ * startLoading() call, these are dumped to file and processed, converting
+ * each snippet to a separate bitmap image file. Once a bitmap file is ready
+ * to be loaded back into LyX, the PreviewLoader emits a signal to inform
+ * the initiating process.
  */
 
 #ifndef PREVIEWLOADER_H
 #define PREVIEWLOADER_H
 
-#ifdef __GNUG__
-#pragma interface
-#endif
+#include <boost/signals2.hpp>
+#include <QObject>
+
+#include "ColorCode.h"
 
-#include "LString.h"
-#include <boost/utility.hpp>
-#include <boost/scoped_ptr.hpp>
-#include <boost/signals/signal1.hpp>
+namespace lyx {
 
 class Buffer;
 
-namespace grfx {
+namespace graphics {
 
 class PreviewImage;
 
-class PreviewLoader : boost::noncopyable {
+class PreviewLoader : public QObject {
+	Q_OBJECT
 public:
 	/** We need buffer because we require the preamble to the
 	 *  LaTeX file.
@@ -43,7 +44,7 @@ public:
 	/** Is there an image already associated with this snippet of LaTeX?
 	 *  If so, returns a pointer to it, else returns 0.
 	 */
-	PreviewImage const * preview(string const & latex_snippet) const;
+	PreviewImage const * preview(std::string const & latex_snippet) const;
 
 	///
 	enum Status {
@@ -58,29 +59,58 @@ public:
 	};
 
 	/// How far have we got in loading the image?
-	Status status(string const & latex_snippet) const;
-	
+	Status status(std::string const & latex_snippet) const;
+
 	/// Add a snippet of LaTeX to the queue for processing.
-	void add(string const & latex_snippet);
+	void add(std::string const & latex_snippet) const;
 
 	/// Remove this snippet of LaTeX from the PreviewLoader.
-	void remove(string const & latex_snippet);
-	
+	void remove(std::string const & latex_snippet) const;
+
 	/** We have accumulated several latex snippets with status "InQueue".
 	 *  Initiate their transformation into bitmap images.
 	 */
-	void startLoading();
+	void startLoading(bool wait = false) const;
 
-	/// Emit this signal when an image is ready for display.
-	boost::signal1<void, PreviewImage const &> imageReady;
+	/** Connect and you'll be informed when the bitmap image file
+	 *  has been created and is ready for loading through
+	 *  lyx::graphics::PreviewImage::image().
+	 */
+	typedef boost::signals2::signal<void(PreviewImage const &)> sig_type;
+	typedef sig_type::slot_type slot_type;
+	///
+	boost::signals2::connection connect(slot_type const &) const;
+
+	/** When PreviewImage has finished loading the image file into memory,
+	 *  it tells the PreviewLoader to tell the outside world
+	 */
+	void emitSignal(PreviewImage const &) const;
+
+	/// Which buffer owns this loader.
+	Buffer const & buffer() const;
+	/// The background color used
+	static ColorCode backgroundColor() { return Color_background; }
+	/// The foreground color used
+	static ColorCode foregroundColor() { return Color_preview; }
+
+	double displayPixelRatio() const ;
+
+public Q_SLOTS:
+	///
+	void refreshPreviews();
 
 private:
+	/// noncopyable
+	PreviewLoader(PreviewLoader const &);
+	void operator=(PreviewLoader const &);
+
 	/// Use the Pimpl idiom to hide the internals.
 	class Impl;
 	/// The pointer never changes although *pimpl_'s contents may.
-	boost::scoped_ptr<Impl> const pimpl_;
+	Impl * const pimpl_;
 };
 
-} // namespace grfx
+} // namespace graphics
+} // namespace lyx
 
 #endif // PREVIEWLOADER_H