ok, the first - realy first - working shot of a special

ImageScrollView. But the most important things are working now and
can be used.
Todo:
- check on a pda(!) doublebuffering (bitBlt) - may be it will paint faster
- implemented mouseEvents seems not working good, its just a first try.

1 files changed, 97 insertions, 0 deletions

diff --git a/noncore/graphics/opie-eye/gui/imagescrollview.cpp b/noncore/graphics/opie-eye/gui/imagescrollview.cpp
new file mode 100644
index 0000000..f36b717
--- a/dev/null
+++ b/noncore/graphics/opie-eye/gui/imagescrollview.cpp
@@ -0,0 +1,97 @@
+#include "imagescrollview.h"
+
+#include <qimage.h>
+#include <qlayout.h>
+
+ImageScrollView::ImageScrollView (const QImage&img, QWidget * parent, const char * name, WFlags f)
+    :QScrollView(parent,name,f|Qt::WRepaintNoErase),_image_data(img)
+{
+    init();
+}
+
+ImageScrollView::ImageScrollView (const QString&img, QWidget * parent, const char * name, WFlags f)
+    :QScrollView(parent,name,f/*|Qt::WRepaintNoErase*/),_image_data(img)
+{
+    init();
+}
+
+void ImageScrollView::setImage(const QImage&img)
+{
+    _image_data = img;
+    init();
+}
+
+/* should be called every time the QImage changed it content */
+void ImageScrollView::init()
+{
+    viewport()->setBackgroundColor(white);
+    resizeContents(_image_data.width(),_image_data.height());
+}
+
+ImageScrollView::~ImageScrollView()
+{
+}
+
+void ImageScrollView::drawContents(QPainter * p, int clipx, int clipy, int clipw, int cliph)
+{
+    int w = clipw;
+    int h = cliph;
+    int x = clipx;
+    int y = clipy;
+    bool erase = false;
+
+    if (w>_image_data.width()) {
+        w=_image_data.width();
+        x = 0;
+        erase = true;
+    } else if (x+w>_image_data.width()){
+        x = _image_data.width()-w;
+    }
+    if (h>_image_data.height()) {
+        h=_image_data.height();
+        y = 0;
+        erase = true;
+    } else if (y+h>_image_data.height()){
+        y = _image_data.height()-h;
+    }
+    if (erase) {
+        p->fillRect(clipx,clipy,clipw,cliph,white);
+    }
+    p->drawImage(clipx,clipy,_image_data,x,y,w,h);
+}
+
+void ImageScrollView::viewportMouseMoveEvent(QMouseEvent* e)
+{
+    int mx, my;
+    viewportToContents( e->x(),  e->y(), mx, my );
+
+    scrollBy(_mouseStartPosX-mx,my-_mouseStartPosY);
+    
+    _mouseStartPosX=mx;
+    _mouseStartPosY=my;
+}
+
+void ImageScrollView::contentsMouseReleaseEvent ( QMouseEvent * e)
+{
+    viewportToContents( e->x(),  e->y(), _mouseStartPosX,_mouseStartPosY );
+}
+
+void ImageScrollView::contentsMousePressEvent ( QMouseEvent * e)
+{
+    viewportToContents( e->x(),  e->y(), _mouseStartPosX,_mouseStartPosY );
+}
+
+/* for testing */
+ImageDlg::ImageDlg(const QString&fname,QWidget * parent, const char * name)
+    :QDialog(parent,name,true,WStyle_ContextHelp)
+{
+    QVBoxLayout*dlglayout = new QVBoxLayout(this);
+    dlglayout->setSpacing(2);
+    dlglayout->setMargin(1);
+    ImageScrollView*inf = new ImageScrollView(fname,this);
+    dlglayout->addWidget(inf);
+}
+
+ImageDlg::~ImageDlg()
+{
+}