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cc_frm_scrollbar: add getScrollBarData() function ...

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to calculate total pages and current page for CComponentsScrollBar


Origin commit data
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Commit: adb71c756c
Author: vanhofen <vanhofen@gmx.de>
Date: 2017-06-14 (Wed, 14 Jun 2017)

Origin message was:
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- cc_frm_scrollbar: add getScrollBarData() function ...

to calculate total pages and current page for CComponentsScrollBar
This commit is contained in:
vanhofen
2017-06-14 14:57:09 +02:00
parent 4138875faf
commit c376a89fc0
2 changed files with 12 additions and 0 deletions
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10
src/gui/components/cc_frm_scrollbar.cpp
View File

@@ -220,6 +220,16 @@ void CComponentsScrollBar::initSegments()
} }
} }
void getScrollBarData(int *total_pages, int *current_page, int total_items, int items_per_page, int selected_item)
{
// avoid divison by zero and fix wrong values
total_items = std::max(total_items, 1);
items_per_page = std::max(items_per_page, 1);
selected_item = std::max(selected_item, 0);
*total_pages = ((total_items - 1) / items_per_page) + 1;
*current_page = selected_item / items_per_page;
}
void paintScrollBar( const int &x_pos, void paintScrollBar( const int &x_pos,
const int &y_pos, const int &y_pos,

2
src/gui/components/cc_frm_scrollbar.h
View File

@@ -145,6 +145,8 @@ class CComponentsScrollBar : public CComponentsFrmChain
void disableVisualize(){enableVisualize(false);} void disableVisualize(){enableVisualize(false);}
}; };
void getScrollBarData(int *total_pages, int *current_page, int total_items, int items_per_page, int selected_item);
/**Small and easy to apply scrollbar paint methode without expilcit object declaration /**Small and easy to apply scrollbar paint methode without expilcit object declaration
* @return void * @return void
* *