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/**
* MIT/X11 License
* Modified (c) 2017 Qball Cow <qball@gmpclient.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <config.h>
#include <glib.h>
#include <widgets/widget.h>
#include <widgets/textbox.h>
#include <widgets/listview.h>
#include <widgets/scrollbar.h>
struct _listview
{
widget widget;
// RChanged
// Text needs to be repainted.
unsigned int rchanged;
// Administration
unsigned int cur_page;
unsigned int last_offset;
unsigned int selected;
unsigned int element_height;
unsigned int element_width;
unsigned int max_rows;
unsigned int max_elements;
//
unsigned int cur_columns;
unsigned int req_elements;
unsigned int cur_elements;
unsigned int padding;
unsigned int menu_lines;
unsigned int menu_columns;
unsigned int fixed_num_lines;
gboolean cycle;
gboolean multi_select;
ScrollType scroll_type;
textbox **boxes;
scrollbar *scrollbar;
listview_update_callback callback;
void *udata;
gboolean scrollbar_scroll;
xcb_timestamp_t last_click;
listview_mouse_activated_cb mouse_activated;
void *mouse_activated_data;
};
static void listview_free ( widget *wid )
{
listview *lv = (listview *) wid;
for ( unsigned int i = 0; i < lv->cur_elements; i++ ) {
widget_free ( WIDGET ( lv->boxes [i] ) );
}
g_free ( lv->boxes );
widget_free ( WIDGET ( lv->scrollbar ) );
g_free ( lv );
}
static unsigned int scroll_per_page ( listview * lv )
{
int offset = 0;
// selected row is always visible.
// If selected is visible do not scroll.
if ( ( ( lv->selected - ( lv->last_offset ) ) < ( lv->max_elements ) ) && ( lv->selected >= ( lv->last_offset ) ) ) {
offset = lv->last_offset;
}
else{
// Do paginating
unsigned int page = ( lv->max_elements > 0 ) ? ( lv->selected / lv->max_elements ) : 0;
offset = page * lv->max_elements;
if ( page != lv->cur_page ) {
lv->cur_page = page;
lv->rchanged = TRUE;
}
// Set the position
//scrollbar_set_handle ( lv->scrollbar, page * lv->max_elements );
}
return offset;
}
static unsigned int scroll_continious ( listview *lv )
{
unsigned int middle = ( lv->max_rows - ( ( lv->max_rows & 1 ) == 0 ) ) / 2;
unsigned int offset = 0;
if ( lv->selected > middle ) {
if ( lv->selected < ( lv->req_elements - ( lv->max_rows - middle ) ) ) {
offset = lv->selected - middle;
}
// Don't go below zero.
else if ( lv->req_elements > lv->max_rows ) {
offset = lv->req_elements - lv->max_rows;
}
}
if ( offset != lv->cur_page ) {
//scrollbar_set_handle ( lv->scrollbar, offset );
lv->cur_page = offset;
lv->rchanged = TRUE;
}
return offset;
}
static void update_element ( listview *lv, unsigned int tb, unsigned int index, gboolean full )
{
// Select drawing mode
TextBoxFontType type = ( index & 1 ) == 0 ? NORMAL : ALT;
type = ( index ) == lv->selected ? HIGHLIGHT : type;
if ( lv->callback ) {
lv->callback ( lv->boxes[tb], index, lv->udata, type, full );
}
}
static void listview_draw ( widget *wid, cairo_t *draw )
{
unsigned int offset = 0;
listview *lv = (listview *) wid;
if ( lv->scroll_type == LISTVIEW_SCROLL_CONTINIOUS ) {
offset = scroll_continious ( lv );
}
else {
offset = scroll_per_page ( lv );
}
// Set these all together to make sure they update consistently.
scrollbar_set_max_value ( lv->scrollbar, lv->req_elements );
scrollbar_set_handle_length ( lv->scrollbar, lv->cur_columns * lv->max_rows );
scrollbar_set_handle ( lv->scrollbar, lv->selected );
lv->last_offset = offset;
if ( lv->cur_elements > 0 && lv->max_rows > 0 ) {
cairo_save ( draw );
// Set new x/y possition.
cairo_translate ( draw, wid->x, wid->y );
unsigned int max = MIN ( lv->cur_elements, lv->req_elements - offset );
if ( lv->rchanged ) {
unsigned int width = lv->widget.w - lv->padding * ( lv->cur_columns - 1 );
if ( widget_enabled ( WIDGET ( lv->scrollbar ) ) ) {
width -= lv->padding;
width -= widget_get_width ( WIDGET ( lv->scrollbar ) );
}
unsigned int element_width = ( width ) / lv->cur_columns;
for ( unsigned int i = 0; i < max; i++ ) {
unsigned int ex = ( ( i ) / lv->max_r
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