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Support for menus with more items than fit on screen; there will be a

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scroll bar at the right side that shows you where you are.
"Page Up/Down" now jump one visible page up and down.
Support for MENU_ITEM_NO_CHOICE type.
Constants are now real constants :)


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8110 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2004-06-22 00:32:48 +00:00
parent 355bc28f32
commit 3be048bd11
1 changed files with 92 additions and 10 deletions
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src/kernel/boot/platform/bios_ia32/menu.cpp
+92 -10
View File
@@ -16,14 +16,25 @@
// position
static int32 kFirstLine = 8;
static int32 kOffsetX = 10;
static const int32 kFirstLine = 8;
static const int32 kOffsetX = 10;
static const int32 kHelpLines = 2;
// colors
static console_color kItemColor = SILVER;
static console_color kSelectedItemColor = WHITE;
static console_color kBackgroundColor = BLACK;
static console_color kSelectedBackgroundColor = SILVER;
static const console_color kItemColor = SILVER;
static const console_color kSelectedItemColor = WHITE;
static const console_color kBackgroundColor = BLACK;
static const console_color kSelectedBackgroundColor = SILVER;
static int32 sMenuOffset = 0;
static int32
menu_height()
{
return console_height() - kFirstLine - kHelpLines;
}
static void
@@ -39,6 +50,10 @@ print_item_at(int32 line, MenuItem *item)
{
bool selected = item->IsSelected();
line -= sMenuOffset;
if (line < 0 || line >= menu_height())
return;
console_color background = selected ? kSelectedBackgroundColor : kBackgroundColor;
console_color foreground = selected ? kSelectedItemColor : kItemColor;
@@ -131,8 +146,33 @@ draw_menu(Menu *menu)
continue;
}
print_item_at(i, item);
i++;
print_item_at(i++, item);
}
int32 height = menu_height();
if (menu->CountItems() >= height) {
int32 x = console_width() - kOffsetX;
console_set_cursor(x, kFirstLine);
console_set_color(YELLOW, BLACK);
putchar(30/*24*/);
height--;
int32 start = sMenuOffset * height / menu->CountItems();
int32 end = (sMenuOffset + height) * height / menu->CountItems();
for (i = 1; i < height; i++) {
console_set_cursor(x, kFirstLine + i);
if (i >= start && i <= end)
console_set_color(WHITE, YELLOW);
else
console_set_color(WHITE, GREY);
putchar(' ');
}
console_set_cursor(x, kFirstLine + i);
console_set_color(YELLOW, BLACK);
putchar(31/*25*/);
}
}
@@ -140,6 +180,7 @@ draw_menu(Menu *menu)
static void
run_menu(Menu *menu)
{
sMenuOffset = 0;
menu->Show();
draw_menu(menu);
@@ -179,6 +220,32 @@ run_menu(Menu *menu)
if (selected >= menu->CountItems())
selected = 0;
break;
case BIOS_KEY_PAGE_UP:
selected -= menu_height() - 1;
while ((item = menu->ItemAt(selected)) != NULL) {
if (item->Type() != MENU_ITEM_SEPARATOR)
break;
selected--;
}
if (selected < 0)
selected = 0;
break;
case BIOS_KEY_PAGE_DOWN:
selected += menu_height() - 1;
while ((item = menu->ItemAt(selected)) != NULL) {
if (item->Type() != MENU_ITEM_SEPARATOR)
break;
selected++;
}
if (selected >= menu->CountItems())
selected = menu->CountItems() - 1;
break;
case BIOS_KEY_HOME:
selected = 0;
break;
@@ -192,17 +259,30 @@ run_menu(Menu *menu)
MenuItem *item = menu->ItemAt(selected);
if (item != NULL)
item->Select(true);
// make sure that the new selected entry is visible
if (sMenuOffset > selected
|| sMenuOffset + menu_height() <= selected) {
if (sMenuOffset > selected)
sMenuOffset = selected;
else
sMenuOffset = selected + 1 - menu_height();
draw_menu(menu);
}
}
} else if (key.code.ascii == 0xd || key.code.ascii == ' ') {
// leave the menu
if (item->Submenu() != NULL) {
int32 offset = sMenuOffset;
menu->Hide();
run_menu(item->Submenu());
// restore current menu
sMenuOffset = offset;
menu->Show();
draw_menu(menu);
// restore current menu
} else if (item->Type() == MENU_ITEM_MARKABLE) {
// toggle state
item->SetMarked(!item->IsMarked());
@@ -210,7 +290,9 @@ run_menu(Menu *menu)
} else if (key.code.ascii == 0xd) {
// the space key does not exit the menu
if (menu->Type() == CHOICE_MENU)
if (menu->Type() == CHOICE_MENU
&& item->Type() != MENU_ITEM_NO_CHOICE
&& item->Type() != MENU_ITEM_TITLE)
item->SetMarked(true);
break;
}