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CComponents: implement scroll functionality into CComponentsForm

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CComponentsForm provides page scroll if found more
than one pre defined page and is working with all derivated sub classes from CComponentsForm .

Pages are defined with setPageNumber(0...n) in items (1st page = 0). The item page number property is
defined in variable cc_page_number. The highest page number sets the
count of pages inside container to required value. Thats compellingly!

To show a page, we can use setCurrentPage(0...n ) and paintCurPage() or use directly paintPage(0...n).
Note: global paint() will show the current page. Default page is 0 (as first).
Use setCurrentPage(0...n) to change this before first call of paint().
Note: In CComponentsWindow class, these methods are applied to window body.

For examples, take a look into CTestMenu
This commit is contained in:
Thilo Graf
2014-06-26 09:59:19 +02:00
parent e6f6931b72
commit 672757606c
13 changed files with 485 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

97
src/gui/components/cc_frm.cpp
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@@ -67,11 +67,16 @@ CComponentsForm::CComponentsForm( const int x_pos, const int y_pos, const int w,
append_x_offset = 0;
append_y_offset = 0;
page_count = 1;
cur_page = 0;
sb = NULL;
w_sb = 15;
}
CComponentsForm::~CComponentsForm()
{
clear();
delete sb;
}
@@ -234,22 +239,70 @@ void CComponentsForm::paint(bool do_save_bg)
paintForm(do_save_bg);
}
bool CComponentsForm::isPageChanged()
{
for(size_t i=0; i<v_cc_items.size(); i++){
if (v_cc_items[i]->getPageNumber() != cur_page)
return true;
}
return false;
}
void CComponentsForm::paintPage(const u_int8_t& page_number, bool do_save_bg)
{
cur_page = page_number;
paint(do_save_bg);
}
void CComponentsForm::paintCCItems()
{
size_t items_count = v_cc_items.size();
//using of real x/y values to paint items if this text object is bound in a parent form
int this_x = x, auto_x = x, this_y = y, auto_y = y;
int this_x = x, auto_x = x, this_y = y, auto_y = y, this_w = width;
if (cc_parent){
this_x = auto_x = cc_xr;
this_y = auto_y = cc_yr;
}
//init and handle scrollbar
getPageCount();
int y_sb = this_y+1;
int x_sb = this_x + width - w_sb;
int h_sb = height-2;
if (sb == NULL){
sb = new CComponentsScrollBar(x_sb, y_sb, w_sb, h_sb);
}else{
//clean background, if dimension of scrollbar was changed
if (w_sb != sb->getWidth())
sb->kill(col_body);
//set current dimensions and position
sb->setDimensionsAll(x_sb, y_sb, w_sb, h_sb);
}
if(page_count > 1){
sb->setSegmentCount(page_count);
sb->setMarkID(cur_page);
this_w = width - w_sb;
sb->paint(false);
}else{
if (sb->isPainted())
sb->kill(col_body);
this_w = width;
}
//detect if current page has changed, if true then kill items from screen
if(isPageChanged()){
this->killCCItems(col_body, true);
}
for(size_t i=0; i<items_count; i++){
//assign item object
CComponentsItem *cc_item = v_cc_items[i];
dprintf(DEBUG_INFO, "[CComponentsForm] %s: page_count = %u, item_page = %u, cur_page = %u\n", __func__, getPageCount(), cc_item->getPageNumber(), this->cur_page);
//get current dimension of item
int w_item = cc_item->getWidth();
int h_item = cc_item->getHeight();
@@ -259,10 +312,9 @@ void CComponentsForm::paintCCItems()
int ypos = cc_item->getYPos();
//check item for corrupt position, skip current item if found problems
//TODO: need a solution with possibility for scrolling
if (ypos > height || xpos > width){
dprintf(DEBUG_INFO, "[CComponentsForm] %s: [form: %d] [item-index %d] [type=%d] WARNING: item position is out of form size:\ndefinied x=%d, defined width=%d \ndefinied y=%d, defined height=%d \n",
__func__, cc_item_index, cc_item->getIndex(), cc_item->getItemType(), xpos, width, ypos, height);
if (ypos > height || xpos > this_w){
dprintf(DEBUG_INFO, "[CComponentsForm] %s: [form: %d] [item-index %d] [type=%d] WARNING: item position is out of form size:\ndefinied x=%d, defined this_w=%d \ndefinied y=%d, defined height=%d \n",
__func__, cc_item_index, cc_item->getIndex(), cc_item->getItemType(), xpos, this_w, ypos, height);
if (this->cc_item_type != CC_ITEMTYPE_FRM_CHAIN)
continue;
}
@@ -276,7 +328,7 @@ void CComponentsForm::paintCCItems()
}
//positionize vertical centered
else if (xpos == CC_CENTERED){
auto_x = width/2 - w_item/2;
auto_x = this_w/2 - w_item/2;
cc_item->setRealXPos(this_x + auto_x);
}
else{
@@ -301,12 +353,11 @@ void CComponentsForm::paintCCItems()
auto_y = (cc_item->getRealYPos() + h_item);
}
//These steps check whether the element can be painted into the container.
//Is it too wide or too high, it will be shortened and displayed in the log.
//This should be avoid!
//checkwidth and adapt if required
int right_frm = (cc_parent ? cc_xr : x) + width - 2*fr_thickness;
int right_frm = (cc_parent ? cc_xr : x) + this_w - 2*fr_thickness;
int right_item = cc_item->getRealXPos() + w_item;
int w_diff = right_item - right_frm;
int new_w = w_item - w_diff;
@@ -314,7 +365,7 @@ void CComponentsForm::paintCCItems()
right_item -= (new_w%2);
w_item -= (new_w%2);
if (right_item > right_frm){
dprintf(DEBUG_INFO, "[CComponentsForm] %s: [form: %d] [item-index %d] [type=%d] width is too large, definied width=%d, possible width=%d \n",
dprintf(DEBUG_INFO, "[CComponentsForm] %s: [form: %d] [item-index %d] [type=%d] this_w is too large, definied width=%d, possible width=%d \n",
__func__, cc_item_index, cc_item->getIndex(), cc_item->getItemType(), w_item, new_w);
cc_item->setWidth(new_w);
}
@@ -339,8 +390,9 @@ void CComponentsForm::paintCCItems()
if (!this->cc_allow_paint)
cc_item->allowPaint(false);
//finally paint current item
cc_item->paint(CC_SAVE_SCREEN_NO);
//finally paint current item, but only required contents of page
if (cc_item->getPageNumber() == cur_page)
cc_item->paint(CC_SAVE_SCREEN_NO);
//restore defined old visibility mode of item after paint
cc_item->allowPaint(item_visible);
@@ -369,3 +421,26 @@ void CComponentsForm::killCCItems(const fb_pixel_t& bg_color, bool ignore_parent
for(size_t i=0; i<v_cc_items.size(); i++)
v_cc_items[i]->kill(bg_color, ignore_parent);
}
void CComponentsForm::setPageCount(const u_int8_t& pageCount)
{
u_int8_t new_val = pageCount;
if (new_val < page_count)
dprintf(DEBUG_NORMAL, "[CComponentsForm] %s: current count (= %u) of pages higher than page_count (= %u) will be set, smaller value is ignored!\n", __func__, page_count, new_val) ;
page_count = max(new_val, page_count);
}
u_int8_t CComponentsForm::getPageCount()
{
u_int8_t num = 0;
for(size_t i=0; i<v_cc_items.size(); i++){
u_int8_t item_num = v_cc_items[i]->getPageNumber();
num = max(item_num, num);
}
//convert type, possible -Wconversion warnings!
page_count = static_cast<u_int8_t>(num + 1);
return page_count;
}