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Fixed paging freeze, simplified show_menu function

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This commit is contained in:
Kai S. K. Engelbart 2020-01-30 13:23:57 +01:00
parent 0138aa5e5f
commit 1c9050484e
1 changed files with 44 additions and 42 deletions
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60
menu.c
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@ -1,5 +1,6 @@
#include "menu.h"
#include <conio.h>
#include <stdio.h>
#include <Windows.h>
@ -19,16 +20,14 @@ const struct MenuBorder SOLID = {
186, 205, 201, 187, 200, 188, '[', ']'
};
void print_content(const int itemc, const struct MenuItem itemv[], const char title[], const struct MenuBorder* border);
void print_content(const size_t itemc, const struct MenuItem itemv[], const char title[], const struct MenuBorder* border);
void show_menu(const struct MenuPage* pages, const size_t page_count, const int infinite_loop)
{
unsigned int page_index = 0;
int action_performed, loop, page_changed = 1;
char page_key, itemKey;
int i;
unsigned page_index = 0;
int action_performed, page_changed, i;
char key;
do {
do {
print_content(pages[page_index].item_count, pages[page_index].items, pages[page_index].title, pages[page_index].border);
@ -36,30 +35,31 @@ void show_menu(const struct MenuPage* pages, const size_t page_count, const int
putchar('>');
putchar(' ');
loop = pages[page_index].loopback;
page_key = _getch();
// Forward paging
if (page_key == 'm' && page_index < page_count - 1)
++page_index;
// Backward paging
else if (page_key == 'n' && page_index > 0)
--page_index;
else
{
if (page_key == 'n' || page_key == 'm')
break;
page_changed = 0;
itemKey = page_key;
do {
page_changed = 0;
action_performed = 0;
itemKey != page_key ? itemKey = _getch() : page_key;
page_key = 0;
// Get user selection
key = _getch();
// Forward paging
if (key == 'm' && page_index < page_count - 1)
{
++page_index;
page_changed = 1;
}
// Backward paging
else if (key == 'n' && page_index > 0)
{
--page_index;
page_changed = 1;
}
else
{
// Search for action with a matching key
for (i = 0; i < pages[page_index].item_count; ++i)
{
if (pages[page_index].items[i].key == itemKey)
if (pages[page_index].items[i].key == key)
{
// Perform action
system("cls");
@ -74,11 +74,13 @@ void show_menu(const struct MenuPage* pages, const size_t page_count, const int
}
}
}
} while (!action_performed);
}
} while (loop || page_changed);
} while (!action_performed && !page_changed);
if (!pages[page_index].loopback && !page_changed)
{
page_index = 0;
}
} while (infinite_loop);
}
@ -105,7 +107,7 @@ void get_console_dimensions(int* width, int* height)
}
// Draws a menu to the console
void print_content(const int itemc, const struct MenuItem itemv[], const char title[], const struct MenuBorder* border)
void print_content(const size_t itemc, const struct MenuItem itemv[], const char title[], const struct MenuBorder* border)
{
unsigned width, height, item_index;
@ -142,7 +144,7 @@ void print_content(const int itemc, const struct MenuItem itemv[], const char ti
putchar(border->corner_upper_right);
}
// Line with menu item
else if (is_item_line(i, itemc, &item_index))
else if (is_item_line(i, (int)itemc, &item_index))
{
// Print item text
putchar(border->line_vertical);