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vdr/osd.c

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C
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/*
* osd.c: Abstract On Screen Display layer
*
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* See the main source file 'vdr.c' for copyright information and
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* how to reach the author.
*
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* $Id: osd.c 1.5 2000/07/26 17:35:09 kls Exp $
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*/
#include "osd.h"
#include <assert.h>
#include <string.h>
// --- cOsdItem --------------------------------------------------------------
cOsdItem::cOsdItem(eOSState State)
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{
text = NULL;
offset = -1;
state = State;
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fresh = false;
}
cOsdItem::cOsdItem(char *Text, eOSState State)
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{
text = NULL;
offset = -1;
state = State;
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fresh = false;
SetText(Text);
}
cOsdItem::~cOsdItem()
{
delete text;
}
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void cOsdItem::SetText(const char *Text, bool Copy)
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{
delete text;
text = Copy ? strdup(Text) : Text;
}
void cOsdItem::Display(int Offset, bool Current)
{
fresh |= Offset >= 0;
Current |= Offset < 0;
if (Offset >= 0)
offset = Offset;
//TODO current if Offset == -1 ???
if (offset >= 0)
Interface.WriteText(0, offset + 2, text, Current);
}
eOSState cOsdItem::ProcessKey(eKeys Key)
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{
return Key == kOk ? state : osUnknown;
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}
// --- cOsdMenu --------------------------------------------------------------
cOsdMenu::cOsdMenu(char *Title, int c0, int c1, int c2, int c3, int c4)
{
visible = false;
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title = strdup(Title);
cols[0] = c0;
cols[1] = c1;
cols[2] = c2;
cols[3] = c3;
cols[4] = c4;
first = 0;
current = marked = -1;
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subMenu = NULL;
helpRed = helpGreen = helpYellow = helpBlue = NULL;
status = NULL;
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Interface.Open();
}
cOsdMenu::~cOsdMenu()
{
delete title;
delete subMenu;
delete status;
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Interface.Clear();
Interface.Close();
}
void cOsdMenu::SetStatus(const char *s)
{
delete status;
status = s ? strdup(s) : NULL;
if (visible)
Interface.Status(status);
}
void cOsdMenu::SetHelp(const char *Red, const char *Green, const char *Yellow, const char *Blue)
{
// strings are NOT copied - must be constants!!!
helpRed = Red;
helpGreen = Green;
helpYellow = Yellow;
helpBlue = Blue;
}
void cOsdMenu::Del(int Index)
{
cList<cOsdItem>::Del(Get(Index));
if (current == Count())
current--;
if (Index == first && first > 0)
first--;
}
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void cOsdMenu::Add(cOsdItem *Item, bool Current)
{
cList<cOsdItem>::Add(Item);
if (Current)
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current = Item->Index();
}
void cOsdMenu::Display(void)
{
visible = true;
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Interface.Clear();
Interface.SetCols(cols);
Interface.Title(title);
Interface.Help(helpRed, helpGreen, helpYellow, helpBlue);
int count = Count();
if (count > 0) {
if (current < 0)
current = 0; // just for safety - there HAS to be a current item!
int n = 0;
if (current - first >= MAXOSDITEMS) {
first = current - MAXOSDITEMS / 2;
if (first + MAXOSDITEMS > count)
first = count - MAXOSDITEMS;
if (first < 0)
first = 0;
}
for (int i = first; i < count; i++) {
cOsdItem *item = Get(i);
if (item)
item->Display(i - first, i == current);
if (++n == MAXOSDITEMS) //TODO get this from Interface!!!
break;
}
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}
Interface.Status(status);
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}
void cOsdMenu::RefreshCurrent(void)
{
cOsdItem *item = Get(current);
if (item)
item->Set();
}
void cOsdMenu::DisplayCurrent(bool Current)
{
cOsdItem *item = Get(current);
if (item)
item->Display(current - first, Current);
}
void cOsdMenu::CursorUp(void)
{
if (current > 0) {
DisplayCurrent(false);
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if (current == first) {
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first -= MAXOSDITEMS;
if (first < 0)
first = 0;
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if (current - MAXOSDITEMS > 0)
current -= MAXOSDITEMS;
else
current--;
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Display();
}
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else {
current--;
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DisplayCurrent(true);
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}
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}
}
void cOsdMenu::CursorDown(void)
{
int count = Count();
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if (current < count - 1) {
DisplayCurrent(false);
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if (current == first + MAXOSDITEMS - 1) {
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first += MAXOSDITEMS;
if (first > count - MAXOSDITEMS)
first = count - MAXOSDITEMS;
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if (current + MAXOSDITEMS < count)
current += MAXOSDITEMS;
else
current++;
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Display();
}
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else {
current++;
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DisplayCurrent(true);
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}
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}
}
void cOsdMenu::Mark(void)
{
if (Count() && marked < 0) {
marked = current;
SetStatus("Up/Dn for new location - OK to move");
}
}
eOSState cOsdMenu::AddSubMenu(cOsdMenu *SubMenu)
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{
delete subMenu;
subMenu = SubMenu;
subMenu->Display();
return osContinue; // convenience return value (see cMenuMain)
}
eOSState cOsdMenu::ProcessKey(eKeys Key)
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{
if (subMenu) {
eOSState state = subMenu->ProcessKey(Key);
if (state == osBack) {
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delete subMenu;
subMenu = NULL;
RefreshCurrent();
Display();
state = osContinue;
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}
return state;
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}
cOsdItem *item = Get(current);
if (marked < 0 && item) {
eOSState state = item->ProcessKey(Key);
if (state != osUnknown)
return state;
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}
switch (Key) {
case kUp: CursorUp(); break;
case kDown: CursorDown(); break;
case kBack: return osBack;
case kOk: if (marked >= 0) {
SetStatus(NULL);
if (marked != current)
Move(marked, current);
marked = -1;
break;
}
// else run into default
default: if (marked < 0)
return osUnknown;
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}
return osContinue;
}