Amebis/wxWidgets
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

added GetVisibleBegin/End() to complement/replace GetFirst/LastVisibleLine() and use them in the code to fix problems when the control is empty and GetLastVisibleLine() returns (size_t)-1 (closes bug 1176561)

Browse Source 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@33360 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2005-04-05 22:43:41 +00:00
parent 9c2a1d53c0
commit dd932cbe1c
3 changed files with 75 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
include/wx/vscroll.h
View File

@@ -118,14 +118,26 @@ public:
size_t GetLineCount() const { return m_lineMax; }
// get the first currently visible line
size_t GetFirstVisibleLine() const { return m_lineFirst; }
size_t GetVisibleBegin() const { return m_lineFirst; }
// get the last currently visible line
size_t GetLastVisibleLine() const { return m_lineFirst + m_nVisible - 1; }
// get the first currently visible line
size_t GetVisibleEnd() const { return m_lineFirst + m_nVisible; }
// is this line currently visible?
bool IsVisible(size_t line) const
{ return line >= m_lineFirst && line <= GetLastVisibleLine(); }
{ return line >= GetVisibleBegin() && line < GetVisibleEnd(); }
// this is the same as GetVisibleBegin(), exists to match
// GetLastVisibleLine() and for backwards compatibility only
size_t GetFirstVisibleLine() const { return m_lineFirst; }
// get the last currently visible line
//
// this function is unsafe as it returns (size_t)-1 (i.e. a huge positive
// number) if the control is empty, use GetVisibleEnd() instead, this one
// is kept for backwards compatibility
size_t GetLastVisibleLine() const { return GetVisibleEnd() - 1; }
protected: