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CComponentsScrollBar: try to fix handling with very much segment count

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In some cases, eg. with very much pages in channellist, the effort
to handle with all count of scrollbar segments was too much. Result: long
waiting times during page scrolling and slider was not visible. This
should be fixed now.
This commit is contained in:
Thilo Graf
2017-08-11 18:36:15 +02:00
parent 0225b043db
commit 71f5779a40
1 changed files with 24 additions and 17 deletions
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41
src/gui/components/cc_frm_scrollbar.cpp
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@@ -147,14 +147,10 @@ void CComponentsScrollBar::initBottomNaviIcon()
void CComponentsScrollBar::initSegments()
{
//init dimensions for segments
int w_seg = width - 2*fr_thickness - 2*append_x_offset;
if (w_seg < 0)
w_seg = 0;
int w_seg = max(0, width - 2*fr_thickness - 2*append_x_offset);
//calculate height of segment container
int h_seg_obj = height - 2*fr_thickness - 2*sb_up_obj->getHeight() - 2*append_y_offset;
if (h_seg_obj < 0)
h_seg_obj = 0;
int h_seg_obj = max(0, height - 2*fr_thickness - 2*sb_up_obj->getHeight() - 2*append_y_offset);
//init segment container
if (sb_segments_obj == NULL){
@@ -169,30 +165,41 @@ void CComponentsScrollBar::initSegments()
//clean up segment container before add new segments
sb_segments_obj->clear();
//hold segment count in this scope
uint32_t tmp_segments = sb_segments_count;
//set y position of 1st segment and set height of segments
int y_seg = append_y_offset;
int h_seg = sb_segments_obj->getHeight()/sb_segments_count - append_y_offset;
if (h_seg < 0)
h_seg = 0;
int h_seg = max(0, int(sb_segments_obj->getHeight()/tmp_segments - append_y_offset));
//reduce required segment count and create a moderate segment height for better visibility of slider if we have very much segments.
uint32_t tmp_quot = 1;
if (h_seg == 0){
h_seg = w_seg - append_y_offset;
tmp_segments = max(1, sb_segments_obj->getHeight() / (h_seg+append_y_offset));
tmp_quot = uint32_t((float)sb_segments_count/(float)tmp_segments + 0.5);
}
fb_pixel_t passive_col = sb_visual_enable ? sb_segment_col : col_body;
//create and add segments to segment container
for(uint32_t i=0; i<sb_segments_count; i++){
for(uint32_t i=0; i<tmp_segments; i++){
CComponentsShapeSquare *item = new CComponentsShapeSquare(0, y_seg, w_seg, h_seg, sb_segments_obj, false);
y_seg += h_seg + append_y_offset;
int id = sb_segments_obj->getCCItemId(item);
//set color for marked id
if (sb_mark_id == id){
if ((tmp_segments == sb_segments_count && sb_mark_id == id) || (tmp_segments != sb_segments_count && int(sb_mark_id/tmp_quot) == id))
{
item->setColorBody(sb_segment_col_sel);
#if 0
item->enableColBodyGradient(CC_COLGRAD_COL_A_2_COL_B);
item->setColBodyGradient(CColorGradient::gradientDark2Light2Dark, CFrameBuffer::gradientHorizontal);
#endif
}
else{
else
{
item->setColorBody(passive_col);
#if 0
item->disableColBodyGradient();
@@ -203,19 +210,19 @@ void CComponentsScrollBar::initSegments()
if (passive_col == col_body){
item->setCorner(RADIUS_MIN, CORNER_ALL);
continue;
}else if (sb_segments_count == 1){
}else if (tmp_segments == 1){
item->setCorner(RADIUS_MIN, CORNER_ALL);
break;
}else if(i == 0){
item->setCorner(RADIUS_MIN, CORNER_TOP);
continue;
}else if(i == sb_segments_count - 1){
}else if(i == tmp_segments - 1){
item->setCorner(RADIUS_MIN, CORNER_BOTTOM);
break;
}else if((i > 0 && i < sb_segments_count - 1)){
item->setCorner(RADIUS_MIN, CORNER_NONE);
}else if((i > 0 && i < tmp_segments - 1)){
item->setCorner(RADIUS_NONE, CORNER_NONE);
}else{
item->setCorner(RADIUS_MIN, CORNER_NONE);
item->setCorner(RADIUS_NONE, CORNER_NONE);
}
}
}