[Qt4 demo] Add a thumbnail dock widget

Useful to show the embedded page thumbnails in the document, if any.
Based on a patch by Shawn Rutledge <shawn.t.rutledge@gmail.com>, reworked by me to be a QListWidget showing the page items at their full size.

4 files changed, 146 insertions, 1 deletions

diff --git a/qt4/demos/CMakeLists.txt b/qt4/demos/CMakeLists.txt
index 59b3f610..76accf81 100644
--- a/qt4/demos/CMakeLists.txt
+++ b/qt4/demos/CMakeLists.txt
@@ -19,6 +19,7 @@ set(poppler_qt4viewer_SRCS
   optcontent.cpp
   pageview.cpp
   permissions.cpp
+  thumbnails.cpp
   toc.cpp
   viewer.cpp
 )
diff --git a/qt4/demos/thumbnails.cpp b/qt4/demos/thumbnails.cpp
new file mode 100644
index 00000000..ba82c2da
--- /dev/null
+++ b/qt4/demos/thumbnails.cpp
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2009, Shawn Rutledge <shawn.t.rutledge@gmail.com>
+ * Copyright (C) 2009, Pino Toscano <pino@kde.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "thumbnails.h"
+
+#include <poppler-qt4.h>
+
+#include <QtGui/QListWidget>
+
+static const int PageRole = Qt::UserRole + 1;
+
+ThumbnailsDock::ThumbnailsDock(QWidget *parent)
+    : AbstractInfoDock(parent)
+{
+    m_list = new QListWidget(this);
+    setWidget(m_list);
+    setWindowTitle(tr("Thumbnails"));
+    m_list->setViewMode(QListView::ListMode);
+    m_list->setMovement(QListView::Static);
+    m_list->setVerticalScrollMode(QListView::ScrollPerPixel);
+    connect(m_list, SIGNAL(itemActivated(QListWidgetItem*)),
+            this, SLOT(slotItemActivated(QListWidgetItem*)));
+}
+
+ThumbnailsDock::~ThumbnailsDock()
+{
+}
+
+void ThumbnailsDock::fillInfo()
+{
+    const int num = document()->numPages();
+    QSize maxSize;
+    for (int i = 0; i < num; ++i) {
+        const Poppler::Page *page = document()->page(i);
+        const QImage image = page->thumbnail();
+        if (!image.isNull()) {
+            QListWidgetItem *item = new QListWidgetItem();
+            item->setText(QString::number(i + 1));
+            item->setData(Qt::DecorationRole, QPixmap::fromImage(image));
+            item->setData(PageRole, i);
+            m_list->addItem(item);
+            maxSize.setWidth(qMax(maxSize.width(), image.width()));
+            maxSize.setHeight(qMax(maxSize.height(), image.height()));
+        }
+        delete page;
+    }
+    if (num > 0) {
+        m_list->setGridSize(maxSize);
+        m_list->setIconSize(maxSize);
+    }
+}
+
+void ThumbnailsDock::documentClosed()
+{
+    m_list->clear();
+    AbstractInfoDock::documentClosed();
+}
+
+void ThumbnailsDock::slotItemActivated(QListWidgetItem *item)
+{
+    if (!item) {
+        return;
+    }
+
+    emit pageClicked(item->data(PageRole).toInt());
+}
+
+#include "thumbnails.moc"
diff --git a/qt4/demos/thumbnails.h b/qt4/demos/thumbnails.h
new file mode 100644
index 00000000..e426b124
--- /dev/null
+++ b/qt4/demos/thumbnails.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2009, Shawn Rutledge <shawn.t.rutledge@gmail.com>
+ * Copyright (C) 2009, Pino Toscano <pino@kde.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef THUMBNAILS_H
+#define THUMBNAILS_H
+
+#include "abstractinfodock.h"
+
+class QListWidget;
+class QListWidgetItem;
+
+class ThumbnailsDock : public AbstractInfoDock
+{
+    Q_OBJECT
+
+public:
+    ThumbnailsDock(QWidget *parent = 0);
+    ~ThumbnailsDock();
+
+    /*virtual*/ void documentClosed();
+
+Q_SIGNALS:
+    void pageClicked(int page);
+
+protected:
+    /*virtual*/ void fillInfo();
+
+private Q_SLOTS:
+    void slotItemActivated(QListWidgetItem *item);
+
+private:
+    QListWidget *m_list;
+};
+
+#endif
diff --git a/qt4/demos/viewer.cpp b/qt4/demos/viewer.cpp
index 61cea0ae..c85e0796 100644
--- a/qt4/demos/viewer.cpp
+++ b/qt4/demos/viewer.cpp
@@ -1,6 +1,7 @@
 /*
- * Copyright (C) 2008, Pino Toscano <pino@kde.org>
+ * Copyright (C) 2008-2009, Pino Toscano <pino@kde.org>
  * Copyright (C) 2008, Albert Astals Cid <aacid@kde.org>
+ * Copyright (C) 2009, Shawn Rutledge <shawn.t.rutledge@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -27,6 +28,7 @@
 #include "optcontent.h"
 #include "pageview.h"
 #include "permissions.h"
+#include "thumbnails.h"
 #include "toc.h"
 
 #include <poppler-qt4.h>
@@ -117,6 +119,13 @@ PdfViewer::PdfViewer()
     viewMenu->addAction(permissionsDock->toggleViewAction());
     m_observers.append(permissionsDock);
 
+    ThumbnailsDock *thumbnailsDock = new ThumbnailsDock(this);
+    addDockWidget(Qt::LeftDockWidgetArea, thumbnailsDock);
+    thumbnailsDock->hide();
+    viewMenu->addAction(thumbnailsDock->toggleViewAction());
+    m_observers.append(thumbnailsDock);
+    connect(thumbnailsDock, SIGNAL(pageClicked(int)), view, SLOT(setPage(int)));
+
     EmbeddedFilesDock *embfilesDock = new EmbeddedFilesDock(this);
     addDockWidget(Qt::BottomDockWidgetArea, embfilesDock);
     embfilesDock->hide();