wxWidgets/samples/scrollsub/scrollsub.cpp
Robert Roebling cddfbd9f55 Some more samples documented etc.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5174 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2000-01-02 18:13:45 +00:00

297 lines
6.8 KiB
C++

/*
* Program: scrollsub
*
* Author: Robert Roebling
*
* Copyright: (C) 1999, Robert Roebling
*
*/
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#include "wx/image.h"
#include "wx/listctrl.h"
#include "wx/sizer.h"
#include "wx/log.h"
// derived classes
class MyFrame;
class MyScrolledWindow;
class MyCanvas;
class MyApp;
// MyScrolledWindow
class MyScrolledWindow: public wxScrolledWindow
{
public:
MyScrolledWindow() {}
MyScrolledWindow( wxWindow *parent, wxWindowID id, const wxPoint &pos, const wxSize &size );
~MyScrolledWindow();
void OnPaint( wxPaintEvent &event );
private:
MyCanvas *m_canvas;
DECLARE_DYNAMIC_CLASS(MyScrolledWindow)
DECLARE_EVENT_TABLE()
};
// MyCanvas
class MyCanvas: public wxPanel
{
public:
MyCanvas() {}
MyCanvas( wxScrolledWindow *parent, wxWindowID id, const wxPoint &pos, const wxSize &size );
~MyCanvas();
void OnPaint( wxPaintEvent &event );
private:
wxScrolledWindow *m_owner;
DECLARE_DYNAMIC_CLASS(MyCanvas)
DECLARE_EVENT_TABLE()
};
// MyFrame
class MyFrame: public wxFrame
{
public:
MyFrame();
void OnAbout( wxCommandEvent &event );
void OnQuit( wxCommandEvent &event );
wxScrolledWindow *m_scrolled;
wxTextCtrl *m_log;
private:
DECLARE_DYNAMIC_CLASS(MyFrame)
DECLARE_EVENT_TABLE()
};
// MyApp
class MyApp: public wxApp
{
public:
virtual bool OnInit();
};
// main program
IMPLEMENT_APP(MyApp)
// MyScrolledWindow
IMPLEMENT_DYNAMIC_CLASS(MyScrolledWindow, wxScrolledWindow)
BEGIN_EVENT_TABLE(MyScrolledWindow, wxScrolledWindow)
EVT_PAINT( MyScrolledWindow::OnPaint)
END_EVENT_TABLE()
MyScrolledWindow::MyScrolledWindow( wxWindow *parent, wxWindowID id,
const wxPoint &pos, const wxSize &size )
: wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER, "test canvas" )
{
m_canvas = new MyCanvas( this, -1, wxDefaultPosition, wxDefaultSize );
SetTargetWindow( m_canvas );
SetBackgroundColour( "WHEAT" );
SetCursor( wxCursor( wxCURSOR_HAND ) );
wxBoxSizer *topsizer = new wxBoxSizer( wxVERTICAL );
topsizer->Add( m_canvas, 1, wxEXPAND|wxALL, 30 );
SetAutoLayout( TRUE );
SetSizer( topsizer );
}
MyScrolledWindow::~MyScrolledWindow()
{
}
void MyScrolledWindow::OnPaint( wxPaintEvent &WXUNUSED(event) )
{
wxPaintDC dc( this );
wxSize size( GetClientSize() );
long w,h;
dc.GetTextExtent( wxT("Headline"), &w, &h );
dc.DrawText( wxT("Headline"), long (size.x / 2 - w / 2), 10 );
}
// MyCanvas
IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxPanel)
BEGIN_EVENT_TABLE(MyCanvas, wxPanel)
EVT_PAINT( MyCanvas::OnPaint)
END_EVENT_TABLE()
MyCanvas::MyCanvas( wxScrolledWindow *parent, wxWindowID id,
const wxPoint &pos, const wxSize &size )
: wxPanel( parent, id, pos, size, wxSUNKEN_BORDER, "test canvas" )
{
m_owner = parent;
(void)new wxButton( this, -1, "Hallo I", wxPoint(0,50), wxSize(100,25) );
(void)new wxButton( this, -1, "Hallo II", wxPoint(200,50), wxSize(100,25) );
SetBackgroundColour( *wxWHITE );
SetCursor( wxCursor( wxCURSOR_IBEAM ) );
}
MyCanvas::~MyCanvas()
{
}
void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
{
wxPaintDC dc( this );
m_owner->PrepareDC( dc );
dc.SetPen( *wxBLACK_PEN );
// OK, let's assume we are a grid control and we have two
// grid cells. Here in OnPaint we want to know which cell
// to redraw so that we prevent redrawing cells that don't
// need to get redrawn. We have one cell at (0,0) and one
// more at (200,0), both having a size of (100,25).
// We can query how much the window has been scrolled
// by calling CalcUnscrolledPosition()
int scroll_x = 0;
int scroll_y = 0;
m_owner->CalcUnscrolledPosition( scroll_x, scroll_y, &scroll_x, &scroll_y );
// We also need to know the size of the window to see which
// cells are completely hidden and not get redrawn
int size_x = 0;
int size_y = 0;
GetClientSize( &size_x, &size_y );
// First cell: (0,0)(100,25)
// It it on screen?
if ((0+100-scroll_x > 0) && (0+25-scroll_y > 0) &&
(0-scroll_x < size_x) && (0-scroll_y < size_y))
{
// Has the region an screen been exposed?
if (IsExposed(0,0,100,25))
{
wxLogMessage( "Redraw first cell" );
dc.DrawRectangle( 0, 0, 100, 25 );
dc.DrawText( "First Cell", 5, 5 );
}
}
// Second cell: (0,200)(100,25)
// It it on screen?
if ((200+100-scroll_x > 0) && (0+25-scroll_y > 0) &&
(200-scroll_x < size_x) && (0-scroll_y < size_y))
{
// Has the region an screen been exposed?
if (IsExposed(200,0,100,25))
{
wxLogMessage( "Redraw second cell" );
dc.DrawRectangle( 200, 0, 100, 25 );
dc.DrawText( "Second Cell", 205, 5 );
}
}
}
// MyFrame
const int ID_QUIT = 108;
const int ID_ABOUT = 109;
IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
BEGIN_EVENT_TABLE(MyFrame,wxFrame)
EVT_MENU (ID_ABOUT, MyFrame::OnAbout)
EVT_MENU (ID_QUIT, MyFrame::OnQuit)
END_EVENT_TABLE()
MyFrame::MyFrame()
: wxFrame( (wxFrame *)NULL, -1, "wxScrolledWindow sample",
wxPoint(20,20), wxSize(470,500) )
{
wxMenu *file_menu = new wxMenu();
file_menu->Append( ID_ABOUT, "&About..");
file_menu->Append( ID_QUIT, "E&xit\tAlt-X");
wxMenuBar *menu_bar = new wxMenuBar();
menu_bar->Append(file_menu, "&File");
SetMenuBar( menu_bar );
CreateStatusBar(2);
int widths[] = { -1, 100 };
SetStatusWidths( 2, widths );
m_scrolled = new MyScrolledWindow( this, -1, wxPoint(0,0), wxSize(100,100) );
m_scrolled->SetScrollbars( 10, 10, 50, 100 );
m_log = new wxTextCtrl( this, -1, "This is the log window.\n", wxPoint(0,0), wxSize(100,100), wxTE_MULTILINE );
wxLog *old_log = wxLog::SetActiveTarget( new wxLogTextCtrl( m_log ) );
delete old_log;
wxBoxSizer *topsizer = new wxBoxSizer( wxVERTICAL );
topsizer->Add( m_scrolled, 1, wxEXPAND );
topsizer->Add( m_log, 0, wxEXPAND );
SetAutoLayout( TRUE );
SetSizer( topsizer );
}
void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
{
Close( TRUE );
}
void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
{
(void)wxMessageBox( "wxScroll demo II\n"
"Robert Roebling (c) 1998",
"About wxScroll II Demo", wxICON_INFORMATION | wxOK );
}
//-----------------------------------------------------------------------------
// MyApp
//-----------------------------------------------------------------------------
bool MyApp::OnInit()
{
wxFrame *frame = new MyFrame();
frame->Show( TRUE );
return TRUE;
}