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/////////////////////////////////////////////////////////////////////////////
// Name: samples/vscroll/vstest.cpp
// Purpose: VScroll wxWidgets sample
// Author: Vadim Zeitlin
// Modified by: Brad Anderson
// Created: 04/01/98
// Copyright: (c) 2003 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
// for all others, include the necessary headers (this file is usually all you
// need because it includes almost all "standard" wxWidgets headers)
#ifndef WX_PRECOMP
#include "wx/wx.h"
#include "wx/app.h"
#include "wx/frame.h"
#endif
// we need to include the headers not included from wx/wx.h explicitly anyhow
#include "wx/vscroll.h"
// ----------------------------------------------------------------------------
// resources
// ----------------------------------------------------------------------------
// the application icon (under Windows and OS/2 it is in resources)
#ifndef wxHAS_IMAGES_IN_RESOURCES
#include "../sample.xpm"
#endif
// ----------------------------------------------------------------------------
// definitions
// ----------------------------------------------------------------------------
#define MAX_LINES 10000
// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------
// Define a new application type, each program should derive a class from wxApp
class VarScrollApp : public wxApp
{
public:
// create our main window
virtual bool OnInit();
};
// Define a new frame type: this is going to be our main frame
class VarScrollFrame : public wxFrame
{
public:
// ctor
VarScrollFrame();
// event handlers (these functions should _not_ be virtual)
void OnQuit(wxCommandEvent& event);
void OnModeVScroll(wxCommandEvent& event);
void OnModeHScroll(wxCommandEvent& event);
void OnModeHVScroll(wxCommandEvent& event);
void OnAbout(wxCommandEvent& event);
void OnSize(wxSizeEvent& event)
{
// show current size in the status bar
#if wxUSE_STATUSBAR
if ( m_frameStatusBar )
{
wxSize sz = GetClientSize();
SetStatusText(wxString::Format(wxT("%dx%d"), sz.x, sz.y), 1);
}
#endif // wxUSE_STATUSBAR
event.Skip();
}
private:
// either a wxVScrolledWindow or a wxHVScrolled window, depending on current mode
wxPanel *m_scrollWindow;
// any class wishing to process wxWidgets events must use this macro
wxDECLARE_EVENT_TABLE();
};
class VScrollWindow : public wxVScrolledWindow
{
public:
VScrollWindow(wxFrame *frame) : wxVScrolledWindow(frame, wxID_ANY)
{
m_frame = frame;
SetRowCount(MAX_LINES);
int i;
for ( i = 0; i < MAX_LINES; ++i )
m_heights[i] = rand()%25+16; // low: 16; high: 40
m_changed = true;
}
void OnIdle(wxIdleEvent&)
{
#if wxUSE_STATUSBAR
m_frame->SetStatusText(wxString::Format
(
wxT("Page size = %d, pos = %d, max = %d"),
GetScrollThumb(wxVERTICAL),
GetScrollPos(wxVERTICAL),
GetScrollRange(wxVERTICAL)
));
#endif // wxUSE_STATUSBAR
m_changed = false;
}
void OnPaint(wxPaintEvent&)
{
wxPaintDC dc(this);
dc.SetPen(*wxBLACK_PEN);
const size_t lineFirst = GetVisibleBegin(),
lineLast = GetVisibleEnd();
const wxCoord hText = dc.GetCharHeight();
wxSize clientSize = GetClientSize();
wxCoord y = 0;
for ( size_t line = lineFirst; line < lineLast; line++ )
{
dc.DrawLine(0, y, clientSize.GetWidth(), y);
wxCoord hLine = OnGetRowHeight(line);
dc.DrawText(wxString::Format(wxT("Line %lu"), (unsigned long)line),
2, y + (hLine - hText) / 2);
y += hLine;
dc.DrawLine(0, y, 1000, y);
}
}
void OnScroll(wxScrollWinEvent& event)
{
m_changed = true;
event.Skip();
}
void OnMouse(wxMouseEvent& event)
{
if(event.LeftDown())
CaptureMouse();
else if(event.LeftUp())
ReleaseMouse();
event.Skip();
}
virtual wxCoord OnGetRowHeight(size_t n) const
{
wxASSERT( n < GetRowCount() );
return m_heights[n];
}
private:
wxFrame *m_frame;
int m_heights[MAX_LINES];
bool m_changed;
wxDECLARE_EVENT_TABLE();
};
wxBEGIN_EVENT_TABLE(VScrollWindow, wxVScrolledWindow)
EVT_IDLE(VScrollWindow::OnIdle)
EVT_PAINT(VScrollWindow::OnPaint)
EVT_SCROLLWIN(VScrollWindow::OnScroll)
EVT_MOUSE_EVENTS(VScrollWindow::OnMouse)
wxEND_EVENT_TABLE()
class HScrollWindow : public wxHScrolledWindow
{
public:
HScrollWindow(wxFrame *frame) : wxHScrolledWindow(frame, wxID_ANY)
{
m_frame = frame;
SetColumnCount(MAX_LINES);
int i;
for ( i = 0; i < MAX_LINES; ++i )
m_heights[i] = rand()%25+16; // low: 15; high: 40
m_changed = true;
}
void OnIdle(wxIdleEvent&)
{
#if wxUSE_STATUSBAR
m_frame->SetStatusText(wxString::Format
(
wxT("Page size = %d, pos = %d, max = %d"),
GetScrollThumb(wxVERTICAL),
GetScrollPos(wxVERTICAL),
GetScrollRange(wxVERTICAL)
));
#endif // wxUSE_STATUSBAR
m_changed = false;
}
void OnPaint(wxPaintEvent&)
{
wxPaintDC dc(this);
dc.SetPen(*wxBLACK_PEN);
const size_t lineFirst = GetVisibleBegin(),
lineLast = GetVisibleEnd();
const wxCoord hText = dc.GetCharHeight();
wxSize clientSize = GetClientSize();
wxCoord x = 0;
for ( size_t line = lineFirst; line < lineLast; line++ )
{
dc.DrawLine(x, 0, x, clientSize.GetHeight());
wxCoord wLine = OnGetColumnWidth(line);
dc.DrawRotatedText(wxString::Format(wxT("Line %lu"), (unsigned long)line),
x + (wLine - hText) / 2, clientSize.GetHeight() - 5, 90);
x += wLine;
dc.DrawLine(x, 0, x, 1000);
}
}
void OnScroll(wxScrollWinEvent& event)
{
m_changed = true;
event.Skip();
}
void OnMouse(wxMouseEvent& event)
{
if(event.LeftDown())
CaptureMouse();
else if(event.LeftUp())
ReleaseMouse();
event.Skip();
}
virtual wxCoord OnGetColumnWidth(size_t n) const
{
wxASSERT( n < GetColumnCount() );
return m_heights[n];
}
private:
wxFrame *m_frame;
int m_heights[MAX_LINES];
bool m_changed;
wxDECLARE_EVENT_TABLE();
};
wxBEGIN_EVENT_TABLE(HScrollWindow, wxHScrolledWindow)
EVT_IDLE(HScrollWindow::OnIdle)
EVT_PAINT(HScrollWindow::OnPaint)
EVT_SCROLLWIN(HScrollWindow::OnScroll)
EVT_MOUSE_EVENTS(HScrollWindow::OnMouse)
wxEND_EVENT_TABLE()
class HVScrollWindow : public wxHVScrolledWindow
{
public:
HVScrollWindow(wxFrame *frame) : wxHVScrolledWindow(frame, wxID_ANY)
{
m_frame = frame;
SetRowColumnCount(MAX_LINES, MAX_LINES);
int i;
for ( i = 0; i < MAX_LINES; ++i )
{
m_heights[i] = rand()%30+31; // low: 30; high: 60
m_widths[i] = rand()%30+61; // low: 60; high: 90
}
m_changed = true;
}
void OnIdle(wxIdleEvent&)
{
#if wxUSE_STATUSBAR
m_frame->SetStatusText(wxString::Format
(
wxT("Page size = %d rows %d columns; pos = row: %d, column: %d; max = %d rows, %d columns"),
GetScrollThumb(wxVERTICAL),
GetScrollThumb(wxHORIZONTAL),
GetScrollPos(wxVERTICAL),
GetScrollPos(wxHORIZONTAL),
GetScrollRange(wxVERTICAL),
GetScrollRange(wxHORIZONTAL)
));
#endif // wxUSE_STATUSBAR
m_changed = false;
}
void OnPaint(wxPaintEvent&)
{
wxPaintDC dc(this);
dc.SetPen(*wxBLACK_PEN);
const size_t rowFirst = GetVisibleRowsBegin(),
rowLast = GetVisibleRowsEnd();
const size_t columnFirst = GetVisibleColumnsBegin(),
columnLast = GetVisibleColumnsEnd();
const wxCoord hText = dc.GetCharHeight();
wxSize clientSize = GetClientSize();
wxCoord y = 0;
wxCoord x = 0;
for ( size_t row = rowFirst; row < rowLast; row++ )
{
wxCoord rowHeight = OnGetRowHeight(row);
dc.DrawLine(0, y, clientSize.GetWidth(), y);
x = 0;
for ( size_t col = columnFirst; col < columnLast; col++ )
{
wxCoord colWidth = OnGetColumnWidth(col);
if ( row == rowFirst )
dc.DrawLine(x, 0, x, clientSize.GetHeight());
dc.DrawText(wxString::Format(wxT("Row %lu"), (unsigned long)row),
x + 2, y + rowHeight / 2 - hText);
dc.DrawText(wxString::Format(wxT("Col %lu"), (unsigned long)col),
x + 2, y + rowHeight / 2);
x += colWidth;
if ( row == rowFirst)
dc.DrawLine(x, 0, x, clientSize.GetHeight());
}
y += rowHeight;
dc.DrawLine(0, y, clientSize.GetWidth(), y);
}
}
void OnScroll(wxScrollWinEvent& event)
{
m_changed = true;
event.Skip();
}
void OnMouse(wxMouseEvent& event)
{
if(event.LeftDown())
CaptureMouse();
else if(event.LeftUp())
ReleaseMouse();
event.Skip();
}
virtual wxCoord OnGetRowHeight(size_t n) const
{
wxASSERT( n < GetRowCount() );
return m_heights[n];
}
virtual wxCoord OnGetColumnWidth(size_t n) const
{
wxASSERT( n < GetColumnCount() );
return m_widths[n];
}
private:
wxFrame *m_frame;
int m_heights[MAX_LINES];
int m_widths[MAX_LINES];
bool m_changed;
wxDECLARE_EVENT_TABLE();
};
wxBEGIN_EVENT_TABLE(HVScrollWindow, wxHVScrolledWindow)
EVT_IDLE(HVScrollWindow::OnIdle)
EVT_PAINT(HVScrollWindow::OnPaint)
EVT_SCROLLWIN(HVScrollWindow::OnScroll)
EVT_MOUSE_EVENTS(HVScrollWindow::OnMouse)
wxEND_EVENT_TABLE()
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// IDs for the controls and the menu commands
enum
{
// menu items
VScroll_Quit = wxID_EXIT,
// it is important for the id corresponding to the "About" command to have
// this standard value as otherwise it won't be handled properly under Mac
// (where it is special and put into the "Apple" menu)
VScroll_About = wxID_ABOUT,
VScroll_VScrollMode = wxID_HIGHEST + 1,
VScroll_HScrollMode,
VScroll_HVScrollMode
};
// ----------------------------------------------------------------------------
// event tables and other macros for wxWidgets
// ----------------------------------------------------------------------------
// the event tables connect the wxWidgets events with the functions (event
// handlers) which process them. It can be also done at run-time, but for the
// simple menu events like this the static method is much simpler.
wxBEGIN_EVENT_TABLE(VarScrollFrame, wxFrame)
EVT_MENU(VScroll_Quit, VarScrollFrame::OnQuit)
EVT_MENU(VScroll_VScrollMode, VarScrollFrame::OnModeVScroll)
EVT_MENU(VScroll_HScrollMode, VarScrollFrame::OnModeHScroll)
EVT_MENU(VScroll_HVScrollMode, VarScrollFrame::OnModeHVScroll)
EVT_MENU(VScroll_About, VarScrollFrame::OnAbout)
EVT_SIZE(VarScrollFrame::OnSize)
wxEND_EVENT_TABLE()
// Create a new application object: this macro will allow wxWidgets to create
// the application object during program execution (it's better than using a
// static object for many reasons) and also declares the accessor function
// wxGetApp() which will return the reference of the right type (i.e. VarScrollApp and
// not wxApp)
IMPLEMENT_APP(VarScrollApp)
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// the application class
// ----------------------------------------------------------------------------
// 'Main program' equivalent: the program execution "starts" here
bool VarScrollApp::OnInit()
{
if ( !wxApp::OnInit() )
return false;
// create the main application window
VarScrollFrame *frame = new VarScrollFrame;
// and show it (the frames, unlike simple controls, are not shown when
// created initially)
frame->Show(true);
// ok
return true;
}
// ----------------------------------------------------------------------------
// main frame
// ----------------------------------------------------------------------------
// frame constructor
VarScrollFrame::VarScrollFrame()
: wxFrame(NULL,
wxID_ANY,
wxT("VScroll wxWidgets Sample"),
wxDefaultPosition,
wxSize(400, 350)),
m_scrollWindow(NULL)
{
// set the frame icon
SetIcon(wxICON(sample));
#if wxUSE_MENUS
// create a menu bar
wxMenu *menuFile = new wxMenu;
wxMenu *menuMode = new wxMenu;
// the "About" item should be in the help menu
wxMenu *menuHelp = new wxMenu;
menuHelp->Append(VScroll_About, wxT("&About\tF1"), wxT("Show about dialog"));
#ifdef wxHAS_RADIO_MENU_ITEMS
menuMode->AppendRadioItem(VScroll_VScrollMode, wxT("&Vertical\tAlt-V"),
wxT("Vertical scrolling only"));
menuMode->AppendRadioItem(VScroll_HScrollMode, wxT("&Horizontal\tAlt-H"),
wxT("Horizontal scrolling only"));
menuMode->AppendRadioItem(VScroll_HVScrollMode,
wxT("Hori&zontal/Vertical\tAlt-Z"),
wxT("Horizontal and vertical scrolling"));
menuMode->Check(VScroll_VScrollMode, true);
#else
menuMode->Append(VScroll_VScrollMode, wxT("&Vertical\tAlt-V"),
wxT("Vertical scrolling only"));
menuMode->Append(VScroll_HScrollMode, wxT("&Horizontal\tAlt-H"),
wxT("Horizontal scrolling only"));
menuMode->Append(VScroll_HVScrollMode, wxT("Hori&zontal/Vertical\tAlt-Z"),
wxT("Horizontal and vertical scrolling"));
#endif
menuFile->Append(VScroll_Quit, wxT("E&xit\tAlt-X"), wxT("Quit this program"));
// now append the freshly created menu to the menu bar...
wxMenuBar *menuBar = new wxMenuBar;
menuBar->Append(menuFile, wxT("&File"));
menuBar->Append(menuMode, wxT("&Mode"));
menuBar->Append(menuHelp, wxT("&Help"));
// ... and attach this menu bar to the frame
SetMenuBar(menuBar);
#endif // wxUSE_MENUS
#if wxUSE_STATUSBAR
// create a status bar just for fun (by default with 1 pane only)
CreateStatusBar(2);
SetStatusText(wxT("Welcome to wxWidgets!"));
int widths[2];
widths[0] = -1;
widths[1] = 100;
SetStatusWidths(2, widths);
#endif // wxUSE_STATUSBAR
// create our one and only child -- it will take our entire client area
if ( menuMode->IsChecked(VScroll_VScrollMode) )
m_scrollWindow = new VScrollWindow(this);
else if ( menuMode->IsChecked(VScroll_HScrollMode) )
m_scrollWindow = new HScrollWindow(this);
else
m_scrollWindow = new HVScrollWindow(this);
}
// ----------------------------------------------------------------------------
// event handlers
// ----------------------------------------------------------------------------
void VarScrollFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
// true is to force the frame to close
Close(true);
}
void VarScrollFrame::OnModeVScroll(wxCommandEvent& WXUNUSED(event))
{
if ( m_scrollWindow )
m_scrollWindow->Destroy();
m_scrollWindow = new VScrollWindow(this);
SendSizeEvent();
}
void VarScrollFrame::OnModeHScroll(wxCommandEvent& WXUNUSED(event))
{
if ( m_scrollWindow )
m_scrollWindow->Destroy();
m_scrollWindow = new HScrollWindow(this);
SendSizeEvent();
}
void VarScrollFrame::OnModeHVScroll(wxCommandEvent& WXUNUSED(event))
{
if ( m_scrollWindow )
m_scrollWindow->Destroy();
m_scrollWindow = new HVScrollWindow(this);
SendSizeEvent();
}
void VarScrollFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
{
wxMessageBox(wxT("VScroll shows how to implement scrolling with\n")
wxT("variable line widths and heights.\n")
wxT("(c) 2003 Vadim Zeitlin"),
wxT("About VScroll"),
wxOK | wxICON_INFORMATION,
this);
}
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