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Add the ability to change a gwin list selection via the api

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Add the ability to scroll a particular item into the current view.
This commit is contained in:
inmarket 2015-04-30 11:32:10 +10:00
parent 83c0eb3526
commit 0501f24f47
2 changed files with 90 additions and 0 deletions
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59
src/gwin/gwin_list.c
View file

@ -569,6 +569,65 @@ const char* gwinListGetSelectedText(GHandle gh) {
return gwinListItemGetText(gh, gwinListGetSelected(gh));
}
void gwinListSetSelected(GHandle gh, int item, bool_t doSelect) {
const gfxQueueASyncItem * qi;
int i;
// is it a valid handle?
if (gh->vmt != (gwinVMT *)&listVMT)
return;
// watch out for an invalid item
if (item < 0 || item >= gh2obj->cnt)
return;
// If not a multiselect mode - clear previous selected item
if (doSelect && !(gh->flags & GLIST_FLG_MULTISELECT)) {
for(qi = gfxQueueASyncPeek(&gh2obj->list_head); qi; qi = gfxQueueASyncNext(qi)) {
if (qi2li->flags & GLIST_FLG_SELECTED) {
qi2li->flags &= ~GLIST_FLG_SELECTED;
break;
}
}
}
// Find item and set selected or not
for(qi = gfxQueueASyncPeek(&gh2obj->list_head), i = 0; qi; qi = gfxQueueASyncNext(qi), i++) {
if (i == item) {
if (doSelect)
qi2li->flags |= GLIST_FLG_SELECTED;
else
qi2li->flags &= ~GLIST_FLG_SELECTED;
break;
}
}
_gwinUpdate(gh);
}
void gwinListViewItem(GHandle gh, int item) {
coord_t iheight;
// is it a valid handle?
if (gh->vmt != (gwinVMT *)&listVMT)
return;
// watch out for an invalid item
if (item < 0 || item >= gh2obj->cnt)
return;
// Work out a possible new top for the list
iheight = gdispGetFontMetric(gh->font, fontHeight) + VERTICAL_PADDING;
gh2obj->top = iheight * item;
// Adjust the list
if (gh2obj->top > gh2obj->cnt * iheight - gh->height-2)
gh2obj->top = gh2obj->cnt * iheight - gh->height-2;
if (gh2obj->top < 0)
gh2obj->top = 0;
_gwinUpdate(gh);
}
#if GWIN_NEED_LIST_IMAGES
void gwinListItemSetImage(GHandle gh, int item, gdispImage *pimg) {
const gfxQueueASyncItem * qi;

31
src/gwin/gwin_list.h
View file

@ -264,6 +264,37 @@ int gwinListGetSelected(GHandle gh);
*/
const char* gwinListGetSelectedText(GHandle gh);
/**
* @brief Set whether a specific item is selected or not
*
* @param[in] gh The widget handle (must be a list handle)
* @param[in] item The item ID
* @param[in] doSelect TRUE to select the item or FALSE to deselect the item
*
* @note Changing the selection using this api call will NOT send the list selection
* change event.
* @note With a single select list selecting an item with this call will deselect
* any existing selected item. De-selecting an item with this call will not
* cause a new item to be automatically selected.
* @note De-selecting an item that is not selected will not effect any items that
* are selected, even in single-select mode.
* @api
*/
void gwinListSetSelected(GHandle gh, int item, bool_t doSelect);
/**
* @brief Scroll the list so the specified item is in view
*
* @param[in] gh The widget handle (must be a list handle)
* @param[in] item The item ID
*
* @note This will typically scroll the selected item to the top of the list
* unless the item is in the last page of list items.
*
* @api
*/
void gwinListViewItem(GHandle gh, int item);
#if GWIN_NEED_LIST_IMAGES || defined(__DOXYGEN__)
/**
* @brief Set the image for a list item