From 26ed416349da55f45a4b23be75bb7a646b68394f Mon Sep 17 00:00:00 2001
From: James Hogan <james@albanarts.com>
Date: Tue, 7 Oct 2008 01:58:19 +0100
Subject: [PATCH] Added preview capabilities to kpresenter2 backend and some
 tweaks

---
 unipresent/kpresenter2/UpKpr2Presentation.cpp | 30 ++++++++++++++++++++++++---
 unipresent/kpresenter2/UpKpr2Presentation.h   | 10 +++++++++
 unipresent/kpresenter2/UpKpr2Slide.cpp        | 27 ++++++++++++++++++++++++
 3 files changed, 64 insertions(+), 3 deletions(-)

diff --git a/unipresent/kpresenter2/UpKpr2Presentation.cpp b/unipresent/kpresenter2/UpKpr2Presentation.cpp
index 51324ff..c3b4236 100644
--- a/unipresent/kpresenter2/UpKpr2Presentation.cpp
+++ b/unipresent/kpresenter2/UpKpr2Presentation.cpp
@@ -91,7 +91,7 @@ QString UpKpr2Presentation::currentSlideshow()
     if (QDBusMessage::ReplyMessage == result.type())
     {
       QString slideshow = result.arguments().first().toString();
-      if (slideshow != "")
+      if (!slideshow.isEmpty())
       {
         return slideshow;
       }
@@ -138,12 +138,20 @@ void UpKpr2Presentation::editCustomSlideshowsDialog()
 
 int UpKpr2Presentation::numSlides()
 {
+  if (m_dbusView)
+  {
+    QDBusMessage result = m_dbusView->call("numCustomSlideShowSlides");
+    if (QDBusMessage::ReplyMessage == result.type())
+    {
+      return result.arguments().first().toInt();
+    }
+  }
   return 0;
 }
 
 UpSlide* UpKpr2Presentation::slide(int index)
 {
-  return 0;
+  return new UpKpr2Slide(this, index);
 }
 
 /*
@@ -281,12 +289,28 @@ void UpKpr2Presentation::nextStep()
 }
 
 /*
+ * Backend specific interface.
+ */
+
+/// Get the dbus interface.
+QDBusInterface& UpKpr2Presentation::dbus()
+{
+  return m_dbus;
+}
+
+/// Get the dbus view interface.
+QDBusInterface* UpKpr2Presentation::dbusView()
+{
+  return m_dbusView;
+}
+
+/*
  * DBus slots
  */
 
 void UpKpr2Presentation::dbusCurrentSlideshowChanged(QString slideshow)
 {
-  if (slideshow == "")
+  if (slideshow.isEmpty())
   {
     slideshow = tr("All slides");
   }
diff --git a/unipresent/kpresenter2/UpKpr2Presentation.h b/unipresent/kpresenter2/UpKpr2Presentation.h
index 239d29f..713497a 100644
--- a/unipresent/kpresenter2/UpKpr2Presentation.h
+++ b/unipresent/kpresenter2/UpKpr2Presentation.h
@@ -86,6 +86,16 @@ class UpKpr2Presentation : public UpPresentation
     virtual void previousStep();
     virtual void nextStep();
 
+    /*
+     * Backend specific interface.
+     */
+
+    /// Get the dbus interface.
+    QDBusInterface& dbus();
+
+    /// Get the dbus view interface.
+    QDBusInterface* dbusView();
+
   private slots:
 
     /*
diff --git a/unipresent/kpresenter2/UpKpr2Slide.cpp b/unipresent/kpresenter2/UpKpr2Slide.cpp
index 2126425..4839086 100644
--- a/unipresent/kpresenter2/UpKpr2Slide.cpp
+++ b/unipresent/kpresenter2/UpKpr2Slide.cpp
@@ -26,6 +26,8 @@
 #include "UpKpr2Slide.h"
 #include "UpKpr2Presentation.h"
 
+#include <QTemporaryFile>
+
 /*
  * Constructors + destructor
  */
@@ -67,6 +69,31 @@ QString UpKpr2Slide::notes()
 
 QPixmap UpKpr2Slide::preview()
 {
+  if (m_preview.isNull())
+  {
+    QDBusInterface* view = m_presentation->dbusView();
+    if (view)
+    {
+      QTemporaryFile previewFile;
+      previewFile.open();
+
+      QDBusMessage result = view->call(
+          "exportPageThumbnail",
+          m_index,    // page
+          167, 125, // size
+          previewFile.fileName(), // filename
+          "PPM",    // format
+          -1        // quality
+      );
+      if (QDBusMessage::ReplyMessage == result.type())
+      {
+        if (result.arguments().first().toBool())
+        {
+          m_preview.load(previewFile.fileName());
+        }
+      }
+    }
+  }
   return m_preview;
 }
 
-- 
2.11.4.GIT