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all code revisited.

Browse Source 
Main additions:
- now it's possible to change the DVC style dynamically
- make models more robust against deleting items, and against other allowed user actions
- comment portions of the code to make it more didactive

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@59323 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Francesco Montorsi
2009-03-04 22:33:18 +00:00
parent 14f73cf1da
commit 81c3f0fce3
3 changed files with 632 additions and 378 deletions
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147
samples/dataview/mymodels.h
View File

@@ -10,6 +10,76 @@
/////////////////////////////////////////////////////////////////////////////
// ----------------------------------------------------------------------------
// MyMusicTreeModelNode: a node inside MyMusicTreeModel
// ----------------------------------------------------------------------------
class MyMusicTreeModelNode;
WX_DEFINE_ARRAY_PTR( MyMusicTreeModelNode*, MyMusicTreeModelNodePtrArray );
class MyMusicTreeModelNode
{
public:
MyMusicTreeModelNode( MyMusicTreeModelNode* parent,
const wxString &title, const wxString &artist,
unsigned int year )
{
m_parent = parent;
m_title = title;
m_artist = artist;
m_year = year;
m_quality = "good";
}
MyMusicTreeModelNode( MyMusicTreeModelNode* parent,
const wxString &branch )
{
m_parent = parent;
m_title = branch;
m_year = -1;
}
~MyMusicTreeModelNode()
{
// free all our children nodes
size_t count = m_children.GetCount();
for (size_t i = 0; i < count; i++)
{
MyMusicTreeModelNode *child = m_children[i];
delete child;
}
}
bool IsContainer() const
{ return m_children.GetCount()>0; }
MyMusicTreeModelNode* GetParent()
{ return m_parent; }
MyMusicTreeModelNodePtrArray& GetChildren()
{ return m_children; }
MyMusicTreeModelNode* GetNthChild( unsigned int n )
{ return m_children.Item( n ); }
void Insert( MyMusicTreeModelNode* child, unsigned int n)
{ m_children.Insert( child, n); }
void Append( MyMusicTreeModelNode* child )
{ m_children.Add( child ); }
unsigned int GetChildCount() const
{ return m_children.GetCount(); }
public: // public to avoid getters/setters
wxString m_title;
wxString m_artist;
int m_year;
wxString m_quality;
private:
MyMusicTreeModelNode *m_parent;
MyMusicTreeModelNodePtrArray m_children;
};
// ----------------------------------------------------------------------------
// MyMusicTreeModel
// ----------------------------------------------------------------------------
@@ -27,64 +97,6 @@ Implement this data model
7: German Requiem Johannes Brahms 1868 good
*/
class MyMusicTreeModelNode;
WX_DEFINE_ARRAY_PTR( MyMusicTreeModelNode*, MyMusicTreeModelNodes );
class MyMusicTreeModelNode
{
public:
MyMusicTreeModelNode( MyMusicTreeModelNode* parent,
const wxString &title, const wxString &artist, int year )
{
m_parent = parent;
m_title = title;
m_artist = artist;
m_year = year;
m_quality = "good";
m_isContainer = false;
}
MyMusicTreeModelNode( MyMusicTreeModelNode* parent,
const wxString &branch )
{
m_parent = parent;
m_title = branch;
m_year = -1;
m_isContainer = true;
}
~MyMusicTreeModelNode()
{
size_t count = m_children.GetCount();
size_t i;
for (i = 0; i < count; i++)
{
MyMusicTreeModelNode *child = m_children[i];
delete child;
}
}
bool IsContainer() { return m_isContainer; }
MyMusicTreeModelNode* GetParent() { return m_parent; }
MyMusicTreeModelNodes &GetChildren() { return m_children; }
MyMusicTreeModelNode* GetNthChild( unsigned int n ) { return m_children.Item( n ); }
void Insert( MyMusicTreeModelNode* child, unsigned int n) { m_children.Insert( child, n); }
void Append( MyMusicTreeModelNode* child ) { m_children.Add( child ); }
unsigned int GetChildCount() { return m_children.GetCount(); }
public:
wxString m_title;
wxString m_artist;
int m_year;
wxString m_quality;
private:
MyMusicTreeModelNode *m_parent;
MyMusicTreeModelNodes m_children;
bool m_isContainer;
};
class MyMusicTreeModel: public wxDataViewModel
{
public:
@@ -101,9 +113,15 @@ public:
// helper methods to change the model
void AddToClassical( const wxString &title, const wxString &artist, int year );
void AddToClassical( const wxString &title, const wxString &artist,
unsigned int year );
void Delete( const wxDataViewItem &item );
wxDataViewItem GetNinthItem() const
{
return wxDataViewItem( m_ninth );
}
// override sorting to always sort branches ascendingly
int Compare( const wxDataViewItem &item1, const wxDataViewItem &item2,
@@ -134,16 +152,15 @@ public:
virtual unsigned int GetChildren( const wxDataViewItem &parent,
wxDataViewItemArray &array ) const;
wxDataViewItem GetNinthItem() const
{
return wxDataViewItem( m_ninth );
}
private:
MyMusicTreeModelNode* m_root;
// pointers to some "special" nodes of the tree:
MyMusicTreeModelNode* m_pop;
MyMusicTreeModelNode* m_classical;
MyMusicTreeModelNode* m_ninth;
// ??
bool m_classicalMusicIsKnownToControl;
};
@@ -193,7 +210,7 @@ public:
private:
wxArrayString m_array;
wxIcon m_icon;
wxIcon m_icon[2];
int m_virtualItems;
};