page scrolling with keys left and right in detail view

HISTORY

@@ -51,3 +51,4 @@ VDR Plugin 'tvguide' Revision History
 - added possibility to replace original VDR schedules menu
 - changed channel jump logic
 - red button also available in detail view
+- page scrolling with keys left and right in detail view

detailview.c

@@ -1,4 +1,3 @@
-#include "services/epgsearch.h"
 #include <sstream>
 #include "detailview.h"
 
@@ -154,6 +153,28 @@ void cDetailView::scrollDown() {
     }
 }
 
+void cDetailView::pageUp() {
+    if (contentScrollable) {
+        int aktHeight = (-1)*content->DrawPort().Point().Y();
+        int totalHeight = content->DrawPort().Height();
+        int screenHeight = content->ViewPort().Height();
+        int newHeight = max(aktHeight - screenHeight, 0);
+        content->SetDrawPortPoint(cPoint(0, (-1)*newHeight));
+        drawScrollbar();
+   }
+}
+
+void cDetailView::pageDown() {
+    if (contentScrollable) {
+        int aktHeight = (-1)*content->DrawPort().Point().Y();
+        int totalHeight = content->DrawPort().Height();
+        int screenHeight = content->ViewPort().Height();
+        int newHeight = min(aktHeight + screenHeight, totalHeight - screenHeight);
+        content->SetDrawPortPoint(cPoint(0, (-1)*newHeight));
+        drawScrollbar();
+    }
+}
+
 cImage *cDetailView::createScrollbar(int width, int height, tColor clrBgr, tColor clrBlend) {
     cImage *image = new cImage(cSize(width, height));
     image->Fill(clrBgr);
@@ -296,6 +317,14 @@ eOSState cDetailView::ProcessKey(eKeys Key) {
             scrollDown(); 
             osdManager.flush();
             break;
+        case kLeft:
+            pageUp();
+            osdManager.flush();
+            break;
+        case kRight:
+            pageDown();
+            osdManager.flush();
+            break;
         case kOk:
         case kBack:
             state = osEnd;

detailview.h

@@ -29,6 +29,10 @@ private:
     int heightEPGPics(void);
     void drawEPGPictures(int height);
     cImage *createScrollbar(int width, int height, tColor clrBgr, tColor clrBlend);
+    void scrollUp();
+    void scrollDown();
+    void pageUp();
+    void pageDown();
 public:
     cDetailView(const cEvent *event);
     virtual ~cDetailView(void);
@@ -36,8 +40,6 @@ public:
     void drawHeader();
     void drawContent();
     void drawScrollbar();
-    void scrollUp();
-    void scrollDown();
     eOSState ProcessKey(eKeys Key);
 };
 

tvguideosd.c

@@ -59,6 +59,7 @@ cTvguideConfig tvguideConfig;
 #include "osdmanager.c"
 cOsdManager osdManager;
 
+#include "services/epgsearch.h"
 #include "tools.c"
 #include "switchtimer.c"
 #include "setup.c"