Complete rewrite of the video4linux capture to use MLT, in progress.

[kdenlive] / src / abstractmonitor.cpp

diff --git a/src/abstractmonitor.cpp b/src/abstractmonitor.cpp
new file mode 100644 (file)
index 0000000..b83765e
--- /dev/null
+++ b/src/abstractmonitor.cpp
@@ -0,0 +1,64 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Jean-Baptiste Mardelle (jb@kdenlive.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 of the License, 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 "abstractmonitor.h"
+
+
+VideoPreviewContainer::VideoPreviewContainer(QWidget *parent) :
+    QFrame(parent),
+    m_image(new QImage())
+{
+    setFrameShape(QFrame::NoFrame);
+    setFocusPolicy(Qt::ClickFocus);
+    setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
+}
+
+
+void VideoPreviewContainer::setImage(QImage img)
+{
+        if (m_image) delete m_image;
+        m_image = new QImage(img);
+        update();
+}
+
+// virtual
+void VideoPreviewContainer::paintEvent(QPaintEvent */*event*/)
+{
+        if (m_image->isNull()) return;
+        QPainter painter(this);
+        double ar = (double) m_image->width() / m_image->height();
+        QRect rect = this->frameRect();
+        int paintW = rect.height() * ar + 0.5;
+        if (paintW > rect.width()) {
+            paintW = rect.width() / ar + 0.5;
+            int diff = (rect.height() - paintW)  / 2;
+            rect.adjust(0, diff, 0, 0);
+            rect.setHeight(paintW);
+        }
+        else {
+            int diff = (rect.width() - paintW)  / 2;
+            rect.adjust(diff, 0, 0, 0);
+            rect.setWidth(paintW);
+        }
+
+        painter.drawImage(rect, *m_image);
+}
+
+