Implemented toggling between current and previous channel

HISTORY

@@ -218,3 +218,5 @@ Video Disk Recorder Revision History
 - Added the description of the timers.conf file to the FORMATS file.
 - Displaying as much as possible of the current/next info (dropping characters
   that would display only partially).
+- In normal viewing mode the '0' key now toggles between the current and the
+  previous channel.

MANUAL

@@ -66,9 +66,12 @@ Video Disk Recorder User's Manual
      if no key is pressed for about half a second, the digits collected so
      far will define the channel number.
 
+  Pressing the '0' key toggles between the current and the previous channel.
+
   After switching to a different channel the channel number and name, as well
-  as the current time are displayed at the top of the screen. This line
-  automatically goes away after about two seconds, or if any key is pressed.
+  as the current time are displayed at the top of the screen. If available, the
+  'current/next' information will be displayed below this line. This display
+  automatically goes away after about five seconds, or if any key is pressed.
   To bring up the channel display without switching channels you can press
   the "Ok" button.
 

menu.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: menu.c 1.29 2000/10/03 12:38:03 kls Exp $
+ * $Id: menu.c 1.30 2000/10/03 14:06:44 kls Exp $
  */
 
 #include "menu.h"
@@ -1186,7 +1186,7 @@ cDirectChannelSelect::~cDirectChannelSelect()
 eOSState cDirectChannelSelect::ProcessKey(eKeys Key)
 {
   switch (Key) {
-    case k0: case k1: case k2: case k3: case k4: case k5: case k6: case k7: case k8: case k9:
+    case k0 ... k9:
          if (number >= 0) {
             number = number * 10 + Key - k0;
             cChannel *channel = Channels.GetByNumber(number);

vdr.c

@@ -22,7 +22,7 @@
  *
  * The project's page is at http://www.cadsoft.de/people/kls/vdr
  *
- * $Id: vdr.c 1.35 2000/09/20 16:45:01 kls Exp $
+ * $Id: vdr.c 1.36 2000/10/03 13:52:26 kls Exp $
  */
 
 #include <getopt.h>
@@ -193,12 +193,14 @@ int main(int argc, char *argv[])
   cOsdBase *Menu = NULL;
   cReplayControl *ReplayControl = NULL;
   int LastChannel = -1;
+  int PreviousChannel = CurrentChannel;
 
   while (!Interrupted) {
         // Channel display:
         if (CurrentChannel != LastChannel) {
            if (!Menu)
               Channels.ShowChannel(CurrentChannel, LastChannel > 0);
+           PreviousChannel = LastChannel;
            LastChannel = CurrentChannel;
            }
         // Timers and Recordings:
@@ -244,8 +246,13 @@ int main(int argc, char *argv[])
            }
         else {
            switch (key) {
+             // Toggle channels:
+             case k0:
+                  if (PreviousChannel != CurrentChannel)
+                     Channels.SwitchTo(PreviousChannel);
+                  break;
              // Direct Channel Select:
-             case k0: case k1: case k2: case k3: case k4: case k5: case k6: case k7: case k8: case k9:
+             case k1 ... k9:
                   if (!Interface.Recording())
                      Menu = new cDirectChannelSelect(key);
                   break;