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ensure m_rowHeightCache is not NULL before accessing it

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This commit is contained in:
Jens Göpfert
2019-01-07 11:56:08 +01:00
committed by Vadim Zeitlin
parent b2cdd287bb
commit 8c64209df1
1 changed files with 14 additions and 10 deletions
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24
src/generic/datavgen.cpp
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@@ -710,7 +710,9 @@ public:
bool Cleared();
void Resort()
{
m_rowHeightCache->Clear();
if ( m_rowHeightCache )
m_rowHeightCache->Clear();
if (!IsVirtualList())
{
m_root->Resort(this);
@@ -2752,7 +2754,7 @@ bool wxDataViewMainWindow::ItemAdded(const wxDataViewItem & parent, const wxData
}
else
{
if (GetOwner()->HasFlag(wxDV_VARIABLE_LINE_HEIGHT))
if ( m_rowHeightCache )
{
// specific position (row) is unclear, so clear whole height cache
m_rowHeightCache->Clear();
@@ -2899,7 +2901,7 @@ bool wxDataViewMainWindow::ItemDeleted(const wxDataViewItem& parent,
return true;
}
if (GetOwner()->HasFlag(wxDV_VARIABLE_LINE_HEIGHT))
if ( m_rowHeightCache )
m_rowHeightCache->Remove(GetRowByItem(parent) + itemPosInNode);
// Delete the item from wxDataViewTreeNode representation:
@@ -2966,7 +2968,7 @@ bool wxDataViewMainWindow::DoItemChanged(const wxDataViewItem & item, int view_c
{
if ( !IsVirtualList() )
{
if (GetOwner()->HasFlag(wxDV_VARIABLE_LINE_HEIGHT))
if ( m_rowHeightCache )
m_rowHeightCache->Remove(GetRowByItem(item));
// Move this node to its new correct place after it was updated.
@@ -3018,7 +3020,9 @@ bool wxDataViewMainWindow::Cleared()
DestroyTree();
m_selection.Clear();
m_currentRow = (unsigned)-1;
m_rowHeightCache->Clear();
if ( m_rowHeightCache )
m_rowHeightCache->Clear();
if (GetModel())
{
@@ -3348,7 +3352,7 @@ wxRect wxDataViewMainWindow::GetLinesRect( unsigned int rowFrom, unsigned int ro
int wxDataViewMainWindow::GetLineStart( unsigned int row ) const
{
// check for the easy case first
if (!GetOwner()->HasFlag(wxDV_VARIABLE_LINE_HEIGHT))
if ( !m_rowHeightCache || !GetOwner()->HasFlag(wxDV_VARIABLE_LINE_HEIGHT) )
return row * m_lineHeight;
int start = 0;
@@ -3378,7 +3382,7 @@ int wxDataViewMainWindow::GetLineStart( unsigned int row ) const
int wxDataViewMainWindow::GetLineAt( unsigned int y ) const
{
// check for the easy case first
if ( !GetOwner()->HasFlag(wxDV_VARIABLE_LINE_HEIGHT) )
if ( !m_rowHeightCache || !GetOwner()->HasFlag(wxDV_VARIABLE_LINE_HEIGHT) )
return y / m_lineHeight;
unsigned int row = 0;
@@ -3430,7 +3434,7 @@ int wxDataViewMainWindow::GetLineAt( unsigned int y ) const
int wxDataViewMainWindow::GetLineHeight( unsigned int row ) const
{
// check for the easy case first
if (!GetOwner()->HasFlag(wxDV_VARIABLE_LINE_HEIGHT))
if ( !m_rowHeightCache || !GetOwner()->HasFlag(wxDV_VARIABLE_LINE_HEIGHT) )
return m_lineHeight;
int height = 0;
@@ -3613,7 +3617,7 @@ void wxDataViewMainWindow::Expand( unsigned int row )
if (!node->HasChildren())
return;
if (GetOwner()->HasFlag(wxDV_VARIABLE_LINE_HEIGHT))
if ( m_rowHeightCache )
{
// Expand makes new rows visible thus we invalidates all following
// rows in the height cache
@@ -3669,7 +3673,7 @@ void wxDataViewMainWindow::Collapse(unsigned int row)
if (!node->HasChildren())
return;
if (GetOwner()->HasFlag(wxDV_VARIABLE_LINE_HEIGHT))
if ( m_rowHeightCache )
{
// Collapse hides rows thus we invalidates all following
// rows in the height cache