added wxVScrolledWindow
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@20772 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
286
samples/vscroll/vstest.cpp
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286
samples/vscroll/vstest.cpp
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/////////////////////////////////////////////////////////////////////////////
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// Name: vscroll.cpp
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// Purpose: VScroll wxWindows sample
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 04/01/98
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// RCS-ID: $Id$
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// Copyright: (c) 2003 Vadim Zeitlin <vadim@wxwindows.org>
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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// For compilers that support precompilation, includes "wx/wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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// for all others, include the necessary headers (this file is usually all you
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// need because it includes almost all "standard" wxWindows headers)
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#ifndef WX_PRECOMP
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#include "wx/app.h"
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#include "wx/frame.h"
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#endif
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// we need to include the headers not included from wx/wx.h explicitly anyhow
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#include "wx/vscroll.h"
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// ----------------------------------------------------------------------------
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// resources
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// ----------------------------------------------------------------------------
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// the application icon (under Windows and OS/2 it is in resources)
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#if !defined(__WXMSW__) && !defined(__WXOS2__)
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#include "mondrian.xpm"
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#endif
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// ----------------------------------------------------------------------------
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// private classes
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// ----------------------------------------------------------------------------
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// Define a new application type, each program should derive a class from wxApp
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class VScrollApp : public wxApp
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{
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public:
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// create our main window
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virtual bool OnInit();
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};
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// Define a new frame type: this is going to be our main frame
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class VScrollFrame : public wxFrame
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{
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public:
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// ctor
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VScrollFrame();
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// event handlers (these functions should _not_ be virtual)
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void OnQuit(wxCommandEvent& event);
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void OnAbout(wxCommandEvent& event);
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void OnSize(wxSizeEvent& event)
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{
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// show current size in the status bar
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#if wxUSE_STATUSBAR
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if ( m_frameStatusBar )
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{
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wxSize sz = GetClientSize();
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SetStatusText(wxString::Format("%dx%d", sz.x, sz.y), 1);
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}
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#endif // wxUSE_STATUSBAR
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event.Skip();
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}
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private:
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// any class wishing to process wxWindows events must use this macro
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DECLARE_EVENT_TABLE()
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};
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class VScrollWindow : public wxVScrolledWindow
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{
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public:
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VScrollWindow(wxFrame *frame) : wxVScrolledWindow(frame, -1)
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{
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m_frame = frame;
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SetLineCount(200);
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m_changed = true;
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}
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void OnIdle(wxIdleEvent&)
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{
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m_frame->SetStatusText(wxString::Format
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(
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"Page size = %d, pos = %d, max = %d",
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GetScrollThumb(wxVERTICAL),
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GetScrollPos(wxVERTICAL),
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GetScrollRange(wxVERTICAL)
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));
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m_changed = false;
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}
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void OnPaint(wxPaintEvent&)
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{
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wxPaintDC dc(this);
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dc.SetPen(*wxBLACK_DASHED_PEN);
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const size_t lineFirst = GetFirstVisibleLine(),
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lineLast = GetLastVisibleLine();
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const wxCoord hText = dc.GetCharHeight();
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wxCoord y = 0;
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for ( size_t line = lineFirst; line <= lineLast; line++ )
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{
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dc.DrawLine(0, y, 1000, y);
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wxCoord hLine = OnGetLineHeight(line);
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dc.DrawText(wxString::Format(_T("Line %lu"), (unsigned long)line),
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0, y + (hLine - hText) / 2);
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y += hLine;
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dc.DrawLine(0, y, 1000, y);
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}
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}
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void OnScroll(wxScrollWinEvent& event)
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{
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m_changed = true;
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event.Skip();
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}
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virtual wxCoord OnGetLineHeight(size_t n) const
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{
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wxASSERT( n < GetLineCount() );
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return n % 2 ? 15 : 30; // 15 + 2*n
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}
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private:
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wxFrame *m_frame;
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bool m_changed;
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DECLARE_EVENT_TABLE()
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};
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BEGIN_EVENT_TABLE(VScrollWindow, wxVScrolledWindow)
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EVT_IDLE(VScrollWindow::OnIdle)
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EVT_PAINT(VScrollWindow::OnPaint)
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EVT_SCROLLWIN(VScrollWindow::OnScroll)
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END_EVENT_TABLE()
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// ----------------------------------------------------------------------------
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// constants
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// ----------------------------------------------------------------------------
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// IDs for the controls and the menu commands
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enum
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{
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// menu items
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VScroll_Quit = 1,
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// it is important for the id corresponding to the "About" command to have
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// this standard value as otherwise it won't be handled properly under Mac
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// (where it is special and put into the "Apple" menu)
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VScroll_About = wxID_ABOUT
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};
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// ----------------------------------------------------------------------------
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// event tables and other macros for wxWindows
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// ----------------------------------------------------------------------------
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// the event tables connect the wxWindows events with the functions (event
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// handlers) which process them. It can be also done at run-time, but for the
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// simple menu events like this the static method is much simpler.
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BEGIN_EVENT_TABLE(VScrollFrame, wxFrame)
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EVT_MENU(VScroll_Quit, VScrollFrame::OnQuit)
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EVT_MENU(VScroll_About, VScrollFrame::OnAbout)
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EVT_SIZE(VScrollFrame::OnSize)
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END_EVENT_TABLE()
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// Create a new application object: this macro will allow wxWindows to create
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// the application object during program execution (it's better than using a
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// static object for many reasons) and also declares the accessor function
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// wxGetApp() which will return the reference of the right type (i.e. VScrollApp and
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// not wxApp)
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IMPLEMENT_APP(VScrollApp)
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// ============================================================================
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// implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// the application class
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// ----------------------------------------------------------------------------
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// 'Main program' equivalent: the program execution "starts" here
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bool VScrollApp::OnInit()
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{
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// create the main application window
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VScrollFrame *frame = new VScrollFrame;
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// and show it (the frames, unlike simple controls, are not shown when
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// created initially)
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frame->Show(TRUE);
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// ok
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return TRUE;
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}
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// ----------------------------------------------------------------------------
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// main frame
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// ----------------------------------------------------------------------------
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// frame constructor
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VScrollFrame::VScrollFrame()
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: wxFrame(NULL,
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-1,
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_T("VScroll wxWindows Sample"),
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wxDefaultPosition,
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wxSize(400, 350))
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{
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// set the frame icon
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SetIcon(wxICON(mondrian));
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#if wxUSE_MENUS
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// create a menu bar
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wxMenu *menuFile = new wxMenu;
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// the "About" item should be in the help menu
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wxMenu *menuHelp = new wxMenu;
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menuHelp->Append(VScroll_About, _T("&About...\tF1"), _T("Show about dialog"));
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menuFile->Append(VScroll_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
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// now append the freshly created menu to the menu bar...
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wxMenuBar *menuBar = new wxMenuBar;
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menuBar->Append(menuFile, _T("&File"));
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menuBar->Append(menuHelp, _T("&Help"));
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// ... and attach this menu bar to the frame
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SetMenuBar(menuBar);
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#endif // wxUSE_MENUS
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#if wxUSE_STATUSBAR
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// create a status bar just for fun (by default with 1 pane only)
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CreateStatusBar(2);
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SetStatusText(_T("Welcome to wxWindows!"));
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#endif // wxUSE_STATUSBAR
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// create our one and only child -- it will take our entire client area
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new VScrollWindow(this);
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}
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// ----------------------------------------------------------------------------
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// event handlers
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// ----------------------------------------------------------------------------
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void VScrollFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
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{
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// TRUE is to force the frame to close
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Close(TRUE);
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}
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void VScrollFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
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{
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wxMessageBox(_T("VScroll shows how to implement scrolling with\n")
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_T("variable line heights.\n")
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_T("<EFBFBD> 2003 Vadim Zeitlin"),
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_T("About VScroll"),
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wxOK | wxICON_INFORMATION,
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this);
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}
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