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CListHelpers: allow UpDownKey with int type, too

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This commit is contained in:
Stefan Seyfried
2016-01-16 17:48:30 +01:00
parent 5550f89853
commit 57f20fcbb7
2 changed files with 27 additions and 8 deletions
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25
src/gui/widget/listhelpers.cpp
View File

@@ -24,10 +24,10 @@
#include <global.h>
#include <gui/bouquetlist.h>
template <class T> int CListHelpers::UpDownKey(T list, neutrino_msg_t msg, int lines, int sel)
static int upDownKey(int size, neutrino_msg_t msg, int lines, int sel)
{
int step;
if (list.empty())
if (size <= 0) /* list.empty() or similar... */
return -1;
if (msg >= CRCInput::RC_MaxRC) {
@@ -47,7 +47,6 @@ template <class T> int CListHelpers::UpDownKey(T list, neutrino_msg_t msg, int l
printf("CListHelpers:%s: invalid key? 0x%lx\n", __func__, msg);
return -1;
}
int size = (int)list.size(); /* bigger than 0, because we checked for empty() before */
// printf("CListHelpers:%s: key 0x%04lx lines %d size %d sel %d\n", __func__, msg, lines, size, sel);
int new_sel = sel + step;
if (new_sel < 0) {
@@ -65,8 +64,20 @@ template <class T> int CListHelpers::UpDownKey(T list, neutrino_msg_t msg, int l
return new_sel;
}
int CListHelpers::_UpDownKey(int size, neutrino_msg_t msg, int lines, int sel, _id<int>)
{
return upDownKey(size, msg, lines, sel);
}
template <typename T> int CListHelpers::_UpDownKey(T list, neutrino_msg_t msg, int lines, int sel, _id<T>)
{
return upDownKey(list.size(), msg, lines, sel);
}
/* all used versions need to be prototyped here, to avoid linker errors */
template int CListHelpers::UpDownKey<std::vector<CBouquet*> >(std::vector<CBouquet*>, neutrino_msg_t, int, int);
template int CListHelpers::UpDownKey<std::vector<CZapitBouquet*> >(std::vector<CZapitBouquet*>, neutrino_msg_t, int, int);
template int CListHelpers::UpDownKey<std::vector<CZapitChannel*> >(std::vector<CZapitChannel*>, neutrino_msg_t, int, int);
template int CListHelpers::UpDownKey<std::vector<CChannelEvent> >(std::vector<CChannelEvent>, neutrino_msg_t, int, int);
/* helper macro for the prototypes */
#define updown_t(x) template int CListHelpers::_UpDownKey<x >(x, neutrino_msg_t, int, int, _id<x >)
updown_t(std::vector<CBouquet*>);
updown_t(std::vector<CZapitBouquet*>);
updown_t(std::vector<CZapitChannel*>);
updown_t(std::vector<CChannelEvent>);

10
src/gui/widget/listhelpers.h
View File

@@ -21,10 +21,18 @@
#ifndef __LISTHELPERS__
#define __LISTHELPERS__
/* allow to trick the compiler into overriding template definitions */
template<typename T> struct _id { typedef T type; };
class CListHelpers
{
public:
template <class T> int UpDownKey(T list, neutrino_msg_t k, int lines, int sel);
template <typename T> int UpDownKey(T list, neutrino_msg_t k, int lines, int sel) {
return _UpDownKey(list, k, lines, sel, _id<T>());
}
private:
/* stackoverflow.com/questions/3052579 */
template <typename T> int _UpDownKey(T list, neutrino_msg_t k, int lines, int sel, _id<T>);
int _UpDownKey(int list, neutrino_msg_t k, int lines, int sel, _id<int>);
};
#endif