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wxWidgets/samples/treelist/treelist.cpp
Maarten Bent eb23d4735c Fix unannotated fall-through warnings
2018-11-25 21:29:37 +01:00

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///////////////////////////////////////////////////////////////////////////////
// Name: samples/treelist/treelist.cpp
// Purpose: Sample showing wxTreeListCtrl.
// Author: Vadim Zeitlin
// Created: 2011-08-19
// Copyright: (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
// ============================================================================
// Declarations
// ============================================================================
// ----------------------------------------------------------------------------
// Headers
// ----------------------------------------------------------------------------
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if !wxUSE_TREELISTCTRL
#error "wxUSE_TREELISTCTRL must be 1 for this sample."
#endif
#ifndef WX_PRECOMP
#include "wx/app.h"
#include "wx/frame.h"
#include "wx/log.h"
#include "wx/menu.h"
#include "wx/sizer.h"
#include "wx/statusbr.h"
#include "wx/textctrl.h"
#endif
#include "wx/treelist.h"
#include "wx/aboutdlg.h"
#include "wx/artprov.h"
// ----------------------------------------------------------------------------
// Resources
// ----------------------------------------------------------------------------
#ifndef wxHAS_IMAGES_IN_RESOURCES
#include "../sample.xpm"
#endif
// ----------------------------------------------------------------------------
// Constants
// ----------------------------------------------------------------------------
// Menu items.
enum
{
Id_MultiSelect = 100,
Id_FlatList,
Id_Checkboxes_Start,
Id_NoCheckboxes = Id_Checkboxes_Start,
Id_Checkboxes2State,
Id_Checkboxes3State,
Id_CheckboxesUser3State,
Id_Checkboxes_End,
Id_DeleteAllItems,
Id_DumpSelection,
Id_Check_HTMLDocs,
Id_Uncheck_HTMLDocs,
Id_Indet_HTMLDocs,
Id_Select_HTMLDocs
};
// Tree list columns.
enum
{
Col_Component,
Col_Files,
Col_Size
};
// ----------------------------------------------------------------------------
// Custom comparator for tree list items comparison
// ----------------------------------------------------------------------------
// This is a toy class as in a real program you would have the original numeric
// data somewhere and wouldn't need to parse it back from strings presumably.
// Nevertheless it shows how to implement a custom comparator which is needed
// if you want to sort by a column with non-textual contents.
class MyComparator : public wxTreeListItemComparator
{
public:
virtual int
Compare(wxTreeListCtrl* treelist,
unsigned column,
wxTreeListItem item1,
wxTreeListItem item2) wxOVERRIDE
{
wxString text1 = treelist->GetItemText(item1, column),
text2 = treelist->GetItemText(item2, column);
switch ( column )
{
case Col_Component:
// Simple alphabetical comparison is fine for those.
return text1.CmpNoCase(text2);
case Col_Files:
// Compare strings as numbers.
return GetNumFilesFromText(text1) - GetNumFilesFromText(text2);
case Col_Size:
// Compare strings as numbers but also take care of "KiB" and
// "MiB" suffixes.
return GetSizeFromText(text1) - GetSizeFromText(text2);
}
wxFAIL_MSG( "Sorting on unknown column?" );
return 0;
}
private:
// Return the number of files handling special value "many". Notice that
// the returned value is signed to allow using it in subtraction above.
int GetNumFilesFromText(const wxString& text) const
{
unsigned long n;
if ( !text.ToULong(&n) )
{
if ( text == "many" )
n = 9999;
else
n = 0;
}
return n;
}
// Return the size in KiB from a string with either KiB or MiB suffix.
int GetSizeFromText(const wxString& text) const
{
wxString size;
unsigned factor = 1;
if ( text.EndsWith(" MiB", &size) )
factor = 1024;
else if ( !text.EndsWith(" KiB", &size) )
return 0;
unsigned long n = 0;
size.ToULong(&n);
return n*factor;
}
};
// ----------------------------------------------------------------------------
// Application class
// ----------------------------------------------------------------------------
class MyApp : public wxApp
{
public:
virtual bool OnInit() wxOVERRIDE;
};
// ----------------------------------------------------------------------------
// Main window class
// ----------------------------------------------------------------------------
class MyFrame : public wxFrame
{
public:
MyFrame();
virtual ~MyFrame();
private:
// Event handlers for the menu and wxTreeListCtrl events.
void OnMultiSelect(wxCommandEvent& event);
void OnFlatList(wxCommandEvent& event);
void OnCheckboxes(wxCommandEvent& event);
void OnDumpSelection(wxCommandEvent& event);
void OnCheckHTMLDocs(wxCommandEvent& event);
void OnSelectHTMLDocs(wxCommandEvent& event);
void OnAbout(wxCommandEvent& event);
void OnExit(wxCommandEvent& event);
void OnDeleteAllItems(wxCommandEvent& event);
void OnSelectionChanged(wxTreeListEvent& event);
void OnItemExpanding(wxTreeListEvent& event);
void OnItemExpanded(wxTreeListEvent& event);
void OnItemChecked(wxTreeListEvent& event);
void OnItemActivated(wxTreeListEvent& event);
void OnItemContextMenu(wxTreeListEvent& event);
enum
{
Icon_File,
Icon_FolderClosed,
Icon_FolderOpened
};
// Create the image list, called once only. Should add images to it in the
// same order as they appear in the enum above.
void InitImageList();
// Create the control with the given styles.
wxTreeListCtrl* CreateTreeListCtrl(long style);
// Recreate an already existing control.
void RecreateTreeListCtrl(long style);
// Helper: return the text of the item or "NONE" if the item is invalid.
wxString DumpItem(wxTreeListItem item) const;
// Another helper: just translate wxCheckBoxState to user-readable text.
static const char* CheckedStateString(wxCheckBoxState state);
wxImageList* m_imageList;
wxTreeListCtrl* m_treelist;
MyComparator m_comparator;
wxTreeListItem m_itemHTMLDocs;
wxLog* m_oldLogTarget;
bool m_isFlat;
wxDECLARE_EVENT_TABLE();
};
// ============================================================================
// Implementation
// ============================================================================
// ----------------------------------------------------------------------------
// Application class
// ----------------------------------------------------------------------------
wxIMPLEMENT_APP(MyApp);
bool MyApp::OnInit()
{
if ( !wxApp::OnInit() )
return false;
new MyFrame;
return true;
}
// ----------------------------------------------------------------------------
// Main window class
// ----------------------------------------------------------------------------
wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU(Id_MultiSelect, MyFrame::OnMultiSelect)
EVT_MENU(Id_FlatList, MyFrame::OnFlatList)
EVT_MENU_RANGE(Id_Checkboxes_Start, Id_Checkboxes_End,
MyFrame::OnCheckboxes)
EVT_MENU(Id_DumpSelection, MyFrame::OnDumpSelection)
EVT_MENU_RANGE(Id_Check_HTMLDocs, Id_Indet_HTMLDocs,
MyFrame::OnCheckHTMLDocs)
EVT_MENU(Id_Select_HTMLDocs, MyFrame::OnSelectHTMLDocs)
EVT_MENU(wxID_ABOUT, MyFrame::OnAbout)
EVT_MENU(wxID_EXIT, MyFrame::OnExit)
EVT_MENU(Id_DeleteAllItems, MyFrame::OnDeleteAllItems)
EVT_TREELIST_SELECTION_CHANGED(wxID_ANY, MyFrame::OnSelectionChanged)
EVT_TREELIST_ITEM_EXPANDING(wxID_ANY, MyFrame::OnItemExpanding)
EVT_TREELIST_ITEM_EXPANDED(wxID_ANY, MyFrame::OnItemExpanded)
EVT_TREELIST_ITEM_CHECKED(wxID_ANY, MyFrame::OnItemChecked)
EVT_TREELIST_ITEM_ACTIVATED(wxID_ANY, MyFrame::OnItemActivated)
EVT_TREELIST_ITEM_CONTEXT_MENU(wxID_ANY, MyFrame::OnItemContextMenu)
wxEND_EVENT_TABLE()
MyFrame::MyFrame()
: wxFrame(NULL, wxID_ANY, "wxWidgets tree/list control sample",
wxDefaultPosition, wxSize(600, 450))
{
m_isFlat = false;
// Create menus and status bar.
SetIcon(wxICON(sample));
wxMenu* fileMenu = new wxMenu;
fileMenu->Append(wxID_EXIT);
wxMenu* treeStyle = new wxMenu;
treeStyle->AppendCheckItem(Id_MultiSelect, "&Multiple selections\tCtrl-M");
treeStyle->AppendSeparator();
treeStyle->AppendRadioItem(Id_NoCheckboxes,
"&No checkboxes\tCtrl-1");
treeStyle->AppendRadioItem(Id_Checkboxes2State,
"&2-state checkboxes\tCtrl-2");
treeStyle->AppendRadioItem(Id_Checkboxes3State,
"&3-state checkboxes\tCtrl-3");
treeStyle->AppendRadioItem(Id_CheckboxesUser3State,
"&User-settable 3-state checkboxes\tCtrl-4");
treeStyle->AppendSeparator();
treeStyle->AppendCheckItem(Id_FlatList, "&Flat list");
wxMenu* treeOper = new wxMenu;
treeOper->Append(Id_DumpSelection, "&Dump selection\tCtrl-D");
treeOper->AppendSeparator();
treeOper->Append(Id_Check_HTMLDocs, "&Check Doc/HTML item\tCtrl-C");
treeOper->Append(Id_Uncheck_HTMLDocs, "&Uncheck Doc/HTML item\tCtrl-U");
treeOper->Append(Id_Indet_HTMLDocs, "Make Doc/HTML &indeterminate\tCtrl-I");
treeOper->Append(Id_Select_HTMLDocs, "&Select Doc/HTML item\tCtrl-S");
treeOper->Append(Id_DeleteAllItems, "DeleteAllItems");
wxMenu* helpMenu = new wxMenu;
helpMenu->Append(wxID_ABOUT);
wxMenuBar* menuBar = new wxMenuBar();
menuBar->Append(fileMenu, "&File");
menuBar->Append(treeStyle, "&Style");
menuBar->Append(treeOper, "&Operations");
menuBar->Append(helpMenu, "&Help");
SetMenuBar(menuBar);
CreateStatusBar(1);
// Construct the image list with the standard images.
InitImageList();
// Create and layout child controls.
m_treelist = CreateTreeListCtrl(wxTL_DEFAULT_STYLE);
wxTextCtrl* textLog = new wxTextCtrl(this, wxID_ANY, "",
wxDefaultPosition, wxDefaultSize,
wxTE_READONLY | wxTE_MULTILINE);
m_oldLogTarget = wxLog::SetActiveTarget(new wxLogTextCtrl(textLog));
wxSizer* sizer = new wxBoxSizer(wxVERTICAL);
sizer->Add(m_treelist, wxSizerFlags(2).Expand());
sizer->Add(textLog, wxSizerFlags(1).Expand());
SetSizer(sizer);
// Finally show everything.
Show();
}
MyFrame::~MyFrame()
{
delete m_imageList;
delete wxLog::SetActiveTarget(m_oldLogTarget);
}
void MyFrame::InitImageList()
{
wxSize iconSize = wxArtProvider::GetSizeHint(wxART_LIST);
if ( iconSize == wxDefaultSize )
iconSize = wxSize(16, 16);
m_imageList = new wxImageList(iconSize.x, iconSize.y);
// The order should be the same as for the enum elements.
static const char* const icons[] =
{
wxART_NORMAL_FILE,
wxART_FOLDER,
wxART_FOLDER_OPEN
};
for ( unsigned n = 0; n < WXSIZEOF(icons); n++ )
{
m_imageList->Add
(
wxArtProvider::GetIcon(icons[n], wxART_LIST, iconSize)
);
}
}
wxTreeListCtrl* MyFrame::CreateTreeListCtrl(long style)
{
wxTreeListCtrl* const
tree = new wxTreeListCtrl(this, wxID_ANY,
wxDefaultPosition, wxDefaultSize,
style);
tree->SetImageList(m_imageList);
tree->AppendColumn("Component",
wxCOL_WIDTH_AUTOSIZE,
wxALIGN_LEFT,
wxCOL_RESIZABLE | wxCOL_SORTABLE);
tree->AppendColumn("# Files",
tree->WidthFor("1,000,000"),
wxALIGN_RIGHT,
wxCOL_RESIZABLE | wxCOL_SORTABLE);
tree->AppendColumn("Size",
tree->WidthFor("1,000,000 KiB"),
wxALIGN_RIGHT,
wxCOL_RESIZABLE | wxCOL_SORTABLE);
// Define a shortcut to save on typing here.
#define ADD_ITEM(item, parent, files, size) \
wxTreeListItem item = tree->AppendItem(m_isFlat ? root : parent, \
#item, \
Icon_FolderClosed, \
Icon_FolderOpened); \
tree->SetItemText(item, Col_Files, files); \
tree->SetItemText(item, Col_Size, size)
wxTreeListItem root = tree->GetRootItem();
ADD_ITEM(Code, root, "", "");
ADD_ITEM(wxMSW, Code, "313", "3.94 MiB");
ADD_ITEM(wxGTK, Code, "180", "1.66 MiB");
ADD_ITEM(wxOSX, Code, "265", "2.36 MiB");
ADD_ITEM(Core, wxOSX, "31", "347 KiB");
ADD_ITEM(Carbon, wxOSX, "91", "1.34 MiB");
ADD_ITEM(Cocoa, wxOSX, "46", "512 KiB");
ADD_ITEM(Documentation, root, "", "");
ADD_ITEM(HTML, Documentation, "many", "");
ADD_ITEM(CHM, Documentation, "1", "");
ADD_ITEM(Samples, root, "", "");
ADD_ITEM(minimal, Samples, "1", "7 KiB");
ADD_ITEM(widgets, Samples, "28", "419 KiB");
#undef ADD_ITEM
// Remember this one for subsequent tests.
m_itemHTMLDocs = HTML;
// Set a custom comparator to compare strings containing numbers correctly.
tree->SetItemComparator(&m_comparator);
return tree;
}
void MyFrame::RecreateTreeListCtrl(long style)
{
wxTreeListCtrl* const treelist = CreateTreeListCtrl(style);
GetSizer()->Replace(m_treelist, treelist);
delete m_treelist;
m_treelist = treelist;
Layout();
}
void MyFrame::OnMultiSelect(wxCommandEvent& event)
{
long style = m_treelist->GetWindowStyle();
if ( event.IsChecked() )
style |= wxTL_MULTIPLE;
else
style &= ~wxTL_MULTIPLE;
RecreateTreeListCtrl(style);
}
void MyFrame::OnFlatList(wxCommandEvent& event)
{
m_isFlat = event.IsChecked();
RecreateTreeListCtrl(m_treelist->GetWindowStyle());
}
void MyFrame::OnCheckboxes(wxCommandEvent& event)
{
long style = m_treelist->GetWindowStyle();
style &= ~(wxTL_CHECKBOX | wxTL_3STATE | wxTL_USER_3STATE);
switch ( event.GetId() )
{
case Id_NoCheckboxes:
break;
case Id_Checkboxes2State:
style |= wxTL_CHECKBOX;
break;
case Id_Checkboxes3State:
style |= wxTL_3STATE;
break;
case Id_CheckboxesUser3State:
style |= wxTL_USER_3STATE;
break;
default:
wxFAIL_MSG( "Unknown checkbox style" );
return;
}
RecreateTreeListCtrl(style);
}
void MyFrame::OnDumpSelection(wxCommandEvent& WXUNUSED(event))
{
if ( m_treelist->HasFlag(wxTL_MULTIPLE) )
{
wxTreeListItems selections;
const unsigned numSelected = m_treelist->GetSelections(selections);
switch ( numSelected )
{
case 0:
wxLogMessage("No items selected");
break;
case 1:
wxLogMessage("Single item selected: %s",
DumpItem(selections[0]));
break;
default:
wxLogMessage("%u items selected:", numSelected);
for ( unsigned n = 0; n < numSelected; n++ )
{
wxLogMessage("\t%s", DumpItem(selections[n]));
}
}
}
else // Single selection
{
wxLogMessage("Selection: %s", DumpItem(m_treelist->GetSelection()));
}
}
void MyFrame::OnCheckHTMLDocs(wxCommandEvent& event)
{
wxCheckBoxState state;
switch ( event.GetId() )
{
case Id_Uncheck_HTMLDocs:
state = wxCHK_UNCHECKED;
break;
case Id_Check_HTMLDocs:
state = wxCHK_CHECKED;
break;
case Id_Indet_HTMLDocs:
state = wxCHK_UNDETERMINED;
break;
default:
wxFAIL_MSG( "Unknown check state" );
return;
}
m_treelist->CheckItem(m_itemHTMLDocs, state);
}
void MyFrame::OnSelectHTMLDocs(wxCommandEvent& WXUNUSED(event))
{
m_treelist->Select(m_itemHTMLDocs);
}
void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
{
wxAboutDialogInfo info;
info.SetDescription("wxTreeListCtrl wxWidgets sample.");
info.SetCopyright("(C) 2011 Vadim Zeitlin <vadim@wxwidgets.org>");
wxAboutBox(info, this);
}
void MyFrame::OnExit(wxCommandEvent& WXUNUSED(event))
{
Close(true);
}
void MyFrame::OnDeleteAllItems(wxCommandEvent& WXUNUSED(event))
{
m_treelist->DeleteAllItems();
}
wxString MyFrame::DumpItem(wxTreeListItem item) const
{
return item.IsOk() ? m_treelist->GetItemText(item) : wxString("NONE");
}
/* static */
const char* MyFrame::CheckedStateString(wxCheckBoxState state)
{
switch ( state )
{
case wxCHK_UNCHECKED:
return "unchecked";
case wxCHK_UNDETERMINED:
return "undetermined";
case wxCHK_CHECKED:
return "checked";
}
return "invalid";
}
void MyFrame::OnSelectionChanged(wxTreeListEvent& event)
{
const char* msg;
if ( m_treelist->HasFlag(wxTL_MULTIPLE) )
msg = "Selection of the \"%s\" item changed.";
else
msg = "Selection changed, now is \"%s\".";
wxLogMessage(msg, DumpItem(event.GetItem()));
}
void MyFrame::OnItemExpanding(wxTreeListEvent& event)
{
wxLogMessage("Item \"%s\" is expanding", DumpItem(event.GetItem()));
}
void MyFrame::OnItemExpanded(wxTreeListEvent& event)
{
wxLogMessage("Item \"%s\" expanded", DumpItem(event.GetItem()));
}
void MyFrame::OnItemChecked(wxTreeListEvent& event)
{
wxTreeListItem item = event.GetItem();
wxLogMessage("Item \"%s\" toggled, now %s (was %s)",
DumpItem(item),
CheckedStateString(m_treelist->GetCheckedState(item)),
CheckedStateString(event.GetOldCheckedState()));
}
void MyFrame::OnItemActivated(wxTreeListEvent& event)
{
wxLogMessage("Item \"%s\" activated", DumpItem(event.GetItem()));
}
void MyFrame::OnItemContextMenu(wxTreeListEvent& event)
{
enum
{
Id_Check_Item,
Id_Uncheck_Item,
Id_Indet_Item,
Id_Check_Recursively,
Id_Update_Parent
};
wxMenu menu;
menu.Append(Id_Check_Item, "&Check item");
menu.Append(Id_Uncheck_Item, "&Uncheck item");
if ( m_treelist->HasFlag(wxTL_3STATE) )
menu.Append(Id_Indet_Item, "Make item &indeterminate");
menu.AppendSeparator();
menu.Append(Id_Check_Recursively, "Check &recursively");
menu.Append(Id_Update_Parent, "Update &parent");
const wxTreeListItem item = event.GetItem();
switch ( m_treelist->GetPopupMenuSelectionFromUser(menu) )
{
case Id_Check_Item:
m_treelist->CheckItem(item);
break;
case Id_Uncheck_Item:
m_treelist->UncheckItem(item);
break;
case Id_Indet_Item:
m_treelist->CheckItem(item, wxCHK_UNDETERMINED);
break;
case Id_Check_Recursively:
m_treelist->CheckItemRecursively(item);
break;
case Id_Update_Parent:
m_treelist->UpdateItemParentStateRecursively(item);
break;
default:
wxFAIL_MSG( "Unexpected menu selection" );
wxFALLTHROUGH;
case wxID_NONE:
return;
}
}
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