// Name: scroll.cpp
// Purpose: wxScrolledWindow sample
// Author: Robert Roebling
-// Modified by:
-// Created:
// RCS-ID: $Id$
// Copyright: (C) 1998 Robert Roebling, 2002 Ron Lee, 2003 Matt Gregory
+// (C) 2008 Vadim Zeitlin
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
-// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-#pragma hdrstop
+ #pragma hdrstop
#endif
#ifndef WX_PRECOMP
-#include "wx/wx.h"
+ #include "wx/wx.h"
#endif
-#include "wx/image.h"
-#include "wx/listctrl.h"
#include "wx/sizer.h"
#include "wx/log.h"
+#include "wx/tglbtn.h"
+// ----------------------------------------------------------------------------
+// a trivial example
+// ----------------------------------------------------------------------------
-// derived classes
+// MySimpleCanvas: a scrolled window which draws a simple rectangle
+class MySimpleCanvas : public wxScrolledWindow
+{
+public:
+ enum
+ {
+ // these numbers are not multiple of 10 (our scroll step) to test for
+ // the absence of rounding errors (e.g. we should have one more page
+ // than WIDTH/10 to show the right side of the rectangle)
+ WIDTH = 292,
+ HEIGHT = 297
+ };
-class MyFrame;
-class MyApp;
+ MySimpleCanvas(wxWindow *parent)
+ : wxScrolledWindow(parent, wxID_ANY)
+ {
+ SetScrollRate( 10, 10 );
+ SetVirtualSize( WIDTH, HEIGHT );
+ SetBackgroundColour( *wxWHITE );
-// MyCanvas
+ Connect(wxEVT_PAINT, wxPaintEventHandler(MySimpleCanvas::OnPaint));
+ }
-class MyCanvas: public wxScrolledWindow
+private:
+ void OnPaint(wxPaintEvent& WXUNUSED(event))
+ {
+ wxPaintDC dc(this);
+
+ // this call is vital: it adjusts the dc to account for the current
+ // scroll offset
+ PrepareDC(dc);
+
+ dc.SetPen( *wxRED_PEN );
+ dc.SetBrush( *wxTRANSPARENT_BRUSH );
+ dc.DrawRectangle( 0, 0, WIDTH, HEIGHT );
+ }
+};
+
+
+// MySimpleFrame: a frame which contains a MySimpleCanvas
+class MySimpleFrame : public wxFrame
{
public:
- MyCanvas() {}
- MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
- ~MyCanvas(){};
- void OnPaint( wxPaintEvent &event );
- void OnQueryPosition( wxCommandEvent &event );
- void OnAddButton( wxCommandEvent &event );
- void OnDeleteButton( wxCommandEvent &event );
- void OnMoveButton( wxCommandEvent &event );
- void OnScrollWin( wxCommandEvent &event );
- void OnMouseDown( wxMouseEvent &event );
+ MySimpleFrame(wxWindow *parent)
+ : wxFrame(parent, wxID_ANY, "MySimpleCanvas")
+ {
+ new MySimpleCanvas(this);
+
+ // ensure that we have scrollbars initially
+ SetClientSize(MySimpleCanvas::WIDTH/2, MySimpleCanvas::HEIGHT/2);
+
+ Show();
+ }
+};
+
+// ----------------------------------------------------------------------
+// a more complex example
+// ----------------------------------------------------------------------
+
+// MyCanvas
+class MyCanvas : public wxScrolledWindow
+{
+public:
+ MyCanvas(wxWindow *parent);
+
+private:
+ void OnPaint(wxPaintEvent& event);
+ void OnQueryPosition(wxCommandEvent& event);
+ void OnAddButton(wxCommandEvent& event);
+ void OnDeleteButton(wxCommandEvent& event);
+ void OnMoveButton(wxCommandEvent& event);
+ void OnScrollWin(wxCommandEvent& event);
+ void OnMouseRightDown(wxMouseEvent& event);
+ void OnMouseWheel(wxMouseEvent& event);
wxButton *m_button;
- DECLARE_DYNAMIC_CLASS(MyCanvas)
DECLARE_EVENT_TABLE()
};
+class MyCanvasFrame : public wxFrame
+{
+public:
+ MyCanvasFrame(wxWindow *parent)
+ : wxFrame(parent, wxID_ANY, "MyCanvas")
+ {
+ m_canvas = new MyCanvas(this);
+
+ wxMenu *menuFile = new wxMenu();
+ menuFile->Append(wxID_DELETE, "&Delete all");
+ menuFile->Append(wxID_NEW, "Insert &new");
+
+ wxMenuBar *mbar = new wxMenuBar();
+ mbar->Append(menuFile, "&File");
+ SetMenuBar( mbar );
+
+ Connect(wxID_DELETE, wxEVT_COMMAND_MENU_SELECTED,
+ wxCommandEventHandler(MyCanvasFrame::OnDeleteAll));
+ Connect(wxID_NEW, wxEVT_COMMAND_MENU_SELECTED,
+ wxCommandEventHandler(MyCanvasFrame::OnInsertNew));
+
+ Show();
+ }
+
+private:
+ void OnDeleteAll(wxCommandEvent& WXUNUSED(event))
+ {
+ m_canvas->DestroyChildren();
+ }
+
+ void OnInsertNew(wxCommandEvent& WXUNUSED(event))
+ {
+ (void)new wxButton(m_canvas, wxID_ANY, "Hello", wxPoint(100,100));
+ }
+
+ MyCanvas *m_canvas;
+};
// ----------------------------------------------------------------------------
-// Autoscrolling example.
+// example using sizers with wxScrolledWindow
// ----------------------------------------------------------------------------
-// this class uses the 'virtual' size attribute along with an internal
-// sizer to automatically set up scrollbars as needed
+const wxSize SMALL_BUTTON( 100, 50 );
+const wxSize LARGE_BUTTON( 300, 200 );
-class MyAutoScrollWindow : public wxScrolledWindow
+class MySizerScrolledWindow : public wxScrolledWindow
{
+public:
+ MySizerScrolledWindow(wxWindow *parent);
+
private:
+ // this button can be clicked to change its own size in the handler below,
+ // the window size will be automatically adjusted to fit the button
+ wxButton *m_button;
- wxButton *m_button;
+ void OnResizeClick(wxCommandEvent& event);
+};
+class MySizerFrame : public wxFrame
+{
public:
+ MySizerFrame(wxWindow *parent)
+ : wxFrame(parent, wxID_ANY, "MySizerScrolledWindow")
+ {
+ new MySizerScrolledWindow(this);
- MyAutoScrollWindow( wxWindow *parent );
+ // ensure that the scrollbars appear when the button becomes large
+ SetClientSize(LARGE_BUTTON/2);
+ Show();
+ }
+};
- void OnResizeClick( wxCommandEvent &WXUNUSED( event ) );
+// ----------------------------------------------------------------------------
+// example showing scrolling only part of the window
+// ----------------------------------------------------------------------------
- DECLARE_EVENT_TABLE()
+// this window consists of an empty space in its corner, column labels window
+// along its top, row labels window along its left hand side and a canvas in
+// the remaining space
+
+class MySubColLabels : public wxWindow
+{
+public:
+ MySubColLabels(wxScrolledWindow *parent)
+ : wxWindow(parent, wxID_ANY)
+ {
+ m_owner = parent;
+
+ Connect(wxEVT_PAINT, wxPaintEventHandler(MySubColLabels::OnPaint));
+ }
+
+private:
+ void OnPaint(wxPaintEvent& WXUNUSED(event))
+ {
+ wxPaintDC dc(this);
+
+ // This is wrong.. it will translate both x and y if the
+ // window is scrolled, the label windows are active in one
+ // direction only. Do the action below instead -- RL.
+ //m_owner->PrepareDC( dc );
+
+ int xScrollUnits, xOrigin;
+
+ m_owner->GetViewStart( &xOrigin, 0 );
+ m_owner->GetScrollPixelsPerUnit( &xScrollUnits, 0 );
+ dc.SetDeviceOrigin( -xOrigin * xScrollUnits, 0 );
+
+ dc.DrawText("Column 1", 5, 5);
+ dc.DrawText("Column 2", 105, 5);
+ dc.DrawText("Column 3", 205, 5);
+ }
+
+ wxScrolledWindow *m_owner;
+};
+
+class MySubRowLabels : public wxWindow
+{
+public:
+ MySubRowLabels(wxScrolledWindow *parent)
+ : wxWindow(parent, wxID_ANY)
+ {
+ m_owner = parent;
+
+ Connect(wxEVT_PAINT, wxPaintEventHandler(MySubRowLabels::OnPaint));
+ }
+
+private:
+ void OnPaint(wxPaintEvent& WXUNUSED(event))
+ {
+ wxPaintDC dc(this);
+
+ // This is wrong.. it will translate both x and y if the
+ // window is scrolled, the label windows are active in one
+ // direction only. Do the action below instead -- RL.
+ //m_owner->PrepareDC( dc );
+
+ int yScrollUnits, yOrigin;
+
+ m_owner->GetViewStart( 0, &yOrigin );
+ m_owner->GetScrollPixelsPerUnit( 0, &yScrollUnits );
+ dc.SetDeviceOrigin( 0, -yOrigin * yScrollUnits );
+
+ dc.DrawText("Row 1", 5, 5);
+ dc.DrawText("Row 2", 5, 30);
+ dc.DrawText("Row 3", 5, 55);
+ dc.DrawText("Row 4", 5, 80);
+ dc.DrawText("Row 5", 5, 105);
+ dc.DrawText("Row 6", 5, 130);
+ }
+
+ wxScrolledWindow *m_owner;
+};
+
+class MySubCanvas : public wxPanel
+{
+public:
+ MySubCanvas(wxScrolledWindow *parent, wxWindow *cols, wxWindow *rows)
+ : wxPanel(parent, wxID_ANY)
+ {
+ m_owner = parent;
+ m_colLabels = cols;
+ m_rowLabels = rows;
+
+ (void)new wxButton(this, wxID_ANY, "Hallo I",
+ wxPoint(0,50), wxSize(100,25) );
+ (void)new wxButton(this, wxID_ANY, "Hallo II",
+ wxPoint(200,50), wxSize(100,25) );
+
+ (void)new wxTextCtrl(this, wxID_ANY, "Text I",
+ wxPoint(0,100), wxSize(100,25) );
+ (void)new wxTextCtrl(this, wxID_ANY, "Text II",
+ wxPoint(200,100), wxSize(100,25) );
+
+ (void)new wxComboBox(this, wxID_ANY, "ComboBox I",
+ wxPoint(0,150), wxSize(100,25));
+ (void)new wxComboBox(this, wxID_ANY, "ComboBox II",
+ wxPoint(200,150), wxSize(100,25));
+
+ SetBackgroundColour("WHEAT");
+
+ Connect(wxEVT_PAINT, wxPaintEventHandler(MySubCanvas::OnPaint));
+ }
+
+ // override the base class function so that when this window is scrolled,
+ // the labels are scrolled in sync
+ virtual void ScrollWindow(int dx, int dy, const wxRect *rect)
+ {
+ wxPanel::ScrollWindow( dx, dy, rect );
+ m_colLabels->ScrollWindow( dx, 0, rect );
+ m_rowLabels->ScrollWindow( 0, dy, rect );
+ }
+
+private:
+ void 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 on screen been exposed?
+ if (IsExposed(0,0,100,25))
+ {
+ 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 on screen been exposed?
+ if (IsExposed(200,0,100,25))
+ {
+ dc.DrawRectangle( 200, 0, 100, 25 );
+ dc.DrawText("Second Cell", 205, 5);
+ }
+ }
+ }
+
+ wxScrolledWindow *m_owner;
+ wxWindow *m_colLabels,
+ *m_rowLabels;
+};
+
+class MySubScrolledWindow : public wxScrolledWindow
+{
+public:
+ enum
+ {
+ CORNER_WIDTH = 60,
+ CORNER_HEIGHT = 25
+ };
+
+ MySubScrolledWindow(wxWindow *parent)
+ : wxScrolledWindow(parent, wxID_ANY)
+ {
+ // create the children
+ MySubColLabels *cols = new MySubColLabels(this);
+ MySubRowLabels *rows = new MySubRowLabels(this);
+
+ m_canvas = new MySubCanvas(this, cols, rows);
+
+ // lay them out
+ wxFlexGridSizer *sizer = new wxFlexGridSizer(2, 2, 10, 10);
+ sizer->Add(CORNER_WIDTH, CORNER_HEIGHT); // just a spacer
+ sizer->Add(cols, wxSizerFlags().Expand());
+ sizer->Add(rows, wxSizerFlags().Expand());
+ sizer->Add(m_canvas, wxSizerFlags().Expand());
+ sizer->AddGrowableRow(1);
+ sizer->AddGrowableCol(1);
+ SetSizer(sizer);
+
+ // this is the key call: it means that only m_canvas will be scrolled
+ // and not this window itself
+ SetTargetWindow(m_canvas);
+
+ SetScrollbars(10, 10, 50, 50);
+
+ Connect(wxEVT_SIZE, wxSizeEventHandler(MySubScrolledWindow::OnSize));
+ }
+
+protected:
+ // scrolled windows which use scroll target different from the window
+ // itself must override this virtual method
+ virtual wxSize GetSizeAvailableForScrollTarget(const wxSize& size)
+ {
+ // decrease the total size by the size of the non-scrollable parts
+ // above/to the left of the canvas
+ wxSize sizeCanvas(size);
+ sizeCanvas.x -= 60;
+ sizeCanvas.y -= 25;
+ return sizeCanvas;
+ }
+
+private:
+ void OnSize(wxSizeEvent& WXUNUSED(event))
+ {
+ // We need to override OnSize so that our scrolled
+ // window a) does call Layout() to use sizers for
+ // positioning the controls but b) does not query
+ // the sizer for their size and use that for setting
+ // the scrollable area as set that ourselves by
+ // calling SetScrollbar() further down.
+
+ Layout();
+
+ AdjustScrollbars();
+ }
+
+ MySubCanvas *m_canvas;
};
+class MySubFrame : public wxFrame
+{
+public:
+ MySubFrame(wxWindow *parent)
+ : wxFrame(parent, wxID_ANY, "MySubScrolledWindow")
+ {
+ new MySubScrolledWindow(this);
+
+ Show();
+ }
+};
// ----------------------------------------------------------------------------
-// MyScrolledWindow classes: examples of wxScrolledWindow usage
+// more simple examples of wxScrolledWindow usage
// ----------------------------------------------------------------------------
// base class for both of them
{
public:
MyScrolledWindowBase(wxWindow *parent)
- : wxScrolledWindow(parent)
- , m_nLines( 100 )
+ : wxScrolledWindow(parent, wxID_ANY,
+ wxDefaultPosition, wxDefaultSize,
+ wxBORDER_SUNKEN)
{
+ m_nLines = 50;
+ m_winSync = NULL;
+ m_inDoSync = false;
+
wxClientDC dc(this);
- dc.GetTextExtent(_T("Line 17"), NULL, &m_hLine);
+ dc.GetTextExtent("Line 17", NULL, &m_hLine);
+ }
+
+ // this scrolled window can be synchronized with another one: if this
+ // function is called with a non-NULL pointer, the given window will be
+ // scrolled to the same position as this one
+ void SyncWith(MyScrolledWindowBase *win)
+ {
+ m_winSync = win;
+
+ DoSyncIfNecessary();
+ }
+
+ virtual void ScrollWindow(int dx, int dy, const wxRect *rect = NULL)
+ {
+ wxScrolledWindow::ScrollWindow(dx, dy, rect);
+
+ DoSyncIfNecessary();
}
protected:
// the height of one line on screen
- wxCoord m_hLine;
+ int m_hLine;
// the number of lines we draw
size_t m_nLines;
+
+private:
+ bool WasScrolledFirst() const { return m_inDoSync; }
+
+ void DoSyncIfNecessary()
+ {
+ if ( m_winSync && !m_winSync->WasScrolledFirst() )
+ {
+ m_inDoSync = true;
+
+ m_winSync->Scroll(GetViewStart());
+
+ m_inDoSync = false;
+ }
+ }
+
+ // the window to synchronize with this one or NULL
+ MyScrolledWindowBase *m_winSync;
+
+ // the flag preventing infinite recursion which would otherwise happen if
+ // one window synchronized the other one which in turn synchronized this
+ // one and so on
+ bool m_inDoSync;
};
// this class does "stupid" redrawing - it redraws everything each time
};
// ----------------------------------------------------------------------------
-// MyAutoTimedScrollingWindow: implements a text viewer with simple blocksize
-// selection to test auto-scrolling functionality
+// implements a text viewer with simple block selection to test auto-scrolling
+// functionality
// ----------------------------------------------------------------------------
-class MyAutoTimedScrollingWindow : public wxScrolledWindow
+class MyAutoScrollingWindow : public wxScrolledWindow
{
-protected: // member data
- // test data variables
- static const wxChar* sm_testData;
- static const int sm_lineCnt; // line count
- static const int sm_lineLen; // line length in characters
- // sizes for graphical data
- wxCoord m_fontH, m_fontW;
- // selection tracking
- wxPoint m_selStart; // beginning of blockwise selection
- wxPoint m_cursor; // end of blockwise selection (mouse position)
-
-protected: // gui stuff
- wxFont m_font;
-
-public: // interface
- MyAutoTimedScrollingWindow( wxWindow* parent );
+public:
+ MyAutoScrollingWindow( wxWindow* parent );
wxRect DeviceCoordsToGraphicalChars(wxRect updRect) const;
wxPoint DeviceCoordsToGraphicalChars(wxPoint pos) const;
wxPoint GraphicalCharToDeviceCoords(wxPoint pos) const;
void MyRefresh();
bool IsSelected(int chX, int chY) const;
static bool IsInside(int k, int bound1, int bound2);
- static wxRect DCNormalize(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
+ static wxRect DCNormalize(int x, int y, int w, int h);
-protected: // event stuff
- DECLARE_EVENT_TABLE()
+private:
+ // event handlers
void OnDraw(wxDC& dc);
void OnMouseLeftDown(wxMouseEvent& event);
void OnMouseLeftUp(wxMouseEvent& event);
void OnMouseMove(wxMouseEvent& event);
+ void OnMouseCaptureLost(wxMouseCaptureLostEvent& event);
void OnScroll(wxScrollWinEvent& event);
+
+ // test data variables
+ static const char* sm_testData;
+ static const int sm_lineCnt; // line count
+ static const int sm_lineLen; // line length in characters
+ // sizes for graphical data
+ int m_fontH, m_fontW;
+ // selection tracking
+ wxPoint m_selStart; // beginning of blockwise selection
+ wxPoint m_cursor; // end of blockwise selection (mouse position)
+
+ // gui stuff
+ wxFont m_font;
+
+
+ DECLARE_EVENT_TABLE()
};
+class MyAutoFrame : public wxFrame
+{
+public:
+ MyAutoFrame(wxWindow *parent)
+ : wxFrame(parent, wxID_ANY, "MyAutoScrollingWindow")
+ {
+ new MyAutoScrollingWindow(this);
+
+ Show();
+ }
+};
+
+
// ----------------------------------------------------------------------------
-// MyFrame
+// MyFrame: the main application frame showing all the classes above
// ----------------------------------------------------------------------------
class MyFrame: public wxFrame
public:
MyFrame();
- void OnAbout( wxCommandEvent &event );
- void OnQuit( wxCommandEvent &event );
- void OnDeleteAll( wxCommandEvent &event );
- void OnInsertNew( wxCommandEvent &event );
+private:
+ void OnAbout(wxCommandEvent& event);
+ void OnQuit(wxCommandEvent& event);
+
+ void OnTestSimple(wxCommandEvent& WXUNUSED(event)) { new MySimpleFrame(this); }
+ void OnTestCanvas(wxCommandEvent& WXUNUSED(event)) { new MyCanvasFrame(this); }
+ void OnTestSizer(wxCommandEvent& WXUNUSED(event)) { new MySizerFrame(this); }
+ void OnTestSub(wxCommandEvent& WXUNUSED(event)) { new MySubFrame(this); }
+ void OnTestAuto(wxCommandEvent& WXUNUSED(event)) { new MyAutoFrame(this); }
- MyCanvas *m_canvas;
- wxTextCtrl *m_log;
+ void OnToggleSync(wxCommandEvent& event);
+ void OnScrollbarVisibility(wxCommandEvent& event);
+
+ MyScrolledWindowBase *m_win1,
+ *m_win2;
- DECLARE_DYNAMIC_CLASS(MyFrame)
DECLARE_EVENT_TABLE()
};
// MyApp
// ----------------------------------------------------------------------------
-class MyApp: public wxApp
+class MyApp : public wxApp
{
public:
virtual bool OnInit();
};
-// ----------------------------------------------------------------------------
-// main program
-// ----------------------------------------------------------------------------
-
-IMPLEMENT_APP(MyApp)
-
-// ids
-
-const long ID_ADDBUTTON = wxNewId();
-const long ID_DELBUTTON = wxNewId();
-const long ID_MOVEBUTTON = wxNewId();
-const long ID_SCROLLWIN = wxNewId();
-const long ID_QUERYPOS = wxNewId();
-
-const long ID_NEWBUTTON = wxNewId();
+// ============================================================================
+// implementation
+// ============================================================================
// ----------------------------------------------------------------------------
// MyCanvas
// ----------------------------------------------------------------------------
-IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
+const wxWindowID ID_ADDBUTTON = wxWindow::NewControlId();
+const wxWindowID ID_DELBUTTON = wxWindow::NewControlId();
+const wxWindowID ID_MOVEBUTTON = wxWindow::NewControlId();
+const wxWindowID ID_SCROLLWIN = wxWindow::NewControlId();
+const wxWindowID ID_QUERYPOS = wxWindow::NewControlId();
+
+const wxWindowID ID_NEWBUTTON = wxWindow::NewControlId();
BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
- EVT_PAINT( MyCanvas::OnPaint)
- EVT_MOUSE_EVENTS( MyCanvas::OnMouseDown)
- EVT_BUTTON( ID_QUERYPOS, MyCanvas::OnQueryPosition)
- EVT_BUTTON( ID_ADDBUTTON, MyCanvas::OnAddButton)
- EVT_BUTTON( ID_DELBUTTON, MyCanvas::OnDeleteButton)
- EVT_BUTTON( ID_MOVEBUTTON, MyCanvas::OnMoveButton)
- EVT_BUTTON( ID_SCROLLWIN, MyCanvas::OnScrollWin)
+ EVT_PAINT( MyCanvas::OnPaint)
+ EVT_RIGHT_DOWN( MyCanvas::OnMouseRightDown)
+ EVT_MOUSEWHEEL( MyCanvas::OnMouseWheel)
+ EVT_BUTTON( ID_QUERYPOS, MyCanvas::OnQueryPosition)
+ EVT_BUTTON( ID_ADDBUTTON, MyCanvas::OnAddButton)
+ EVT_BUTTON( ID_DELBUTTON, MyCanvas::OnDeleteButton)
+ EVT_BUTTON( ID_MOVEBUTTON, MyCanvas::OnMoveButton)
+ EVT_BUTTON( ID_SCROLLWIN, MyCanvas::OnScrollWin)
END_EVENT_TABLE()
-MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
- const wxPoint &pos, const wxSize &size )
- : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER | wxTAB_TRAVERSAL, _T("test canvas") )
+MyCanvas::MyCanvas(wxWindow *parent)
+ : wxScrolledWindow(parent, wxID_ANY,
+ wxDefaultPosition, wxDefaultSize,
+ wxSUNKEN_BORDER | wxTAB_TRAVERSAL)
{
+ // you can use either a single SetScrollbars() call or these 2 functions,
+ // usually using them is better because you normally won't need to change
+ // the scroll rate in the future and the sizer can be used to update the
+ // virtual size automatically
SetScrollRate( 10, 10 );
SetVirtualSize( 500, 1000 );
- (void) new wxButton( this, ID_ADDBUTTON, _T("add button"), wxPoint(10,10) );
- (void) new wxButton( this, ID_DELBUTTON, _T("del button"), wxPoint(10,40) );
- (void) new wxButton( this, ID_MOVEBUTTON, _T("move button"), wxPoint(150,10) );
- (void) new wxButton( this, ID_SCROLLWIN, _T("scroll win"), wxPoint(250,10) );
-
-#if 0
-
- wxString choices[] =
- {
- "This",
- "is one of my",
- "really",
- "wonderful",
- "examples."
- };
-
- m_button = new wxButton( this, ID_QUERYPOS, "Query position", wxPoint(10,110) );
-
- (void) new wxTextCtrl( this, wxID_ANY, "wxTextCtrl", wxPoint(10,150), wxSize(80,wxDefaultCoord) );
-
- (void) new wxRadioButton( this, wxID_ANY, "Disable", wxPoint(10,190) );
-
- (void) new wxComboBox( this, wxID_ANY, "This", wxPoint(10,230), wxDefaultSize, 5, choices );
+ (void) new wxButton( this, ID_ADDBUTTON, "add button", wxPoint(10,10) );
+ (void) new wxButton( this, ID_DELBUTTON, "del button", wxPoint(10,40) );
+ (void) new wxButton( this, ID_MOVEBUTTON, "move button", wxPoint(150,10) );
+ (void) new wxButton( this, ID_SCROLLWIN, "scroll win", wxPoint(250,10) );
- (void) new wxRadioBox( this, wxID_ANY, "This", wxPoint(10,310), wxDefaultSize, 5, choices, 2, wxRA_SPECIFY_COLS );
-
- (void) new wxRadioBox( this, wxID_ANY, "This", wxPoint(10,440), wxDefaultSize, 5, choices, 2, wxRA_SPECIFY_ROWS );
-
- wxListCtrl *m_listCtrl = new wxListCtrl(
- this, wxID_ANY, wxPoint(200, 110), wxSize(180, 120),
- wxLC_REPORT | wxSIMPLE_BORDER | wxLC_SINGLE_SEL );
-
- m_listCtrl->InsertColumn(0, "First", wxLIST_FORMAT_LEFT, 90);
- m_listCtrl->InsertColumn(1, "Last", wxLIST_FORMAT_LEFT, 90);
-
- for ( int i=0; i < 30; i++)
- {
- char buf[20];
- sprintf(buf, "Item %d", i);
- m_listCtrl->InsertItem(i, buf);
- }
- m_listCtrl->SetItemState( 3, wxLIST_STATE_SELECTED, wxLIST_STATE_SELECTED );
-
- (void) new wxListBox( this, wxID_ANY, wxPoint(260,280), wxSize(120,120), 5, choices, wxLB_ALWAYS_SB );
-
-#endif
+ wxPanel *test = new wxPanel( this, wxID_ANY,
+ wxPoint(10, 110), wxSize(130,50),
+ wxSIMPLE_BORDER | wxTAB_TRAVERSAL );
+ test->SetBackgroundColour( "WHEAT" );
- wxPanel *test = new wxPanel( this, wxID_ANY, wxPoint(10, 110), wxSize(130,50), wxSIMPLE_BORDER | wxTAB_TRAVERSAL );
- test->SetBackgroundColour( wxT("WHEAT") );
-
-#if 0
-
- wxButton *test2 = new wxButton( test, wxID_ANY, "Hallo", wxPoint(10,10) );
-
- test = new wxPanel( this, wxID_ANY, wxPoint(160, 530), wxSize(130,120), wxSUNKEN_BORDER | wxTAB_TRAVERSAL );
- test->SetBackgroundColour( wxT("WHEAT") );
- test->SetCursor( wxCursor( wxCURSOR_NO_ENTRY ) );
- test2 = new wxButton( test, wxID_ANY, "Hallo", wxPoint(10,10) );
- test2->SetCursor( wxCursor( wxCURSOR_PENCIL ) );
-
- test = new wxPanel( this, wxID_ANY, wxPoint(310, 530), wxSize(130,120), wxRAISED_BORDER | wxTAB_TRAVERSAL );
- test->SetBackgroundColour( wxT("WHEAT") );
- test->SetCursor( wxCursor( wxCURSOR_PENCIL ) );
- test2 = new wxButton( test, wxID_ANY, "Hallo", wxPoint(10,10) );
- test2->SetCursor( wxCursor( wxCURSOR_NO_ENTRY ) );
-
-#endif
-
- SetBackgroundColour( wxT("BLUE") );
+ SetBackgroundColour( "BLUE" );
+}
- SetCursor( wxCursor( wxCURSOR_IBEAM ) );
+void MyCanvas::OnMouseRightDown( wxMouseEvent &event )
+{
+ wxPoint pt( event.GetPosition() );
+ int x,y;
+ CalcUnscrolledPosition( pt.x, pt.y, &x, &y );
+ wxLogMessage("Mouse down event at: %d %d, scrolled: %d %d",
+ pt.x, pt.y, x, y);
}
-void MyCanvas::OnMouseDown( wxMouseEvent &event )
+void MyCanvas::OnMouseWheel( wxMouseEvent &event )
{
- if (event.LeftDown())
- {
- wxPoint pt( event.GetPosition() );
- int x,y;
- CalcUnscrolledPosition( pt.x, pt.y, &x, &y );
- wxLogMessage( wxT("Mouse down event at: %d %d, scrolled: %d %d"), pt.x, pt.y, x, y );
+ wxPoint pt( event.GetPosition() );
+ int x,y;
+ CalcUnscrolledPosition( pt.x, pt.y, &x, &y );
+ wxLogMessage( "Mouse wheel event at: %d %d, scrolled: %d %d\n"
+ "Rotation: %d, delta = %d",
+ pt.x, pt.y, x, y,
+ event.GetWheelRotation(), event.GetWheelDelta() );
- if ( !event.LeftIsDown() )
- wxLogMessage( wxT("Error: LeftIsDown() should be true if for LeftDown()") );
- }
+ event.Skip();
}
void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
wxPaintDC dc( this );
PrepareDC( dc );
- dc.DrawText( _T("Press mouse button to test calculations!"), 160, 50 );
+ dc.DrawText( "Press right mouse button to test calculations!", 160, 50 );
- dc.DrawText( _T("Some text"), 140, 140 );
+ dc.DrawText( "Some text", 140, 140 );
dc.DrawRectangle( 100, 160, 200, 200 );
}
void MyCanvas::OnQueryPosition( wxCommandEvent &WXUNUSED(event) )
{
wxPoint pt( m_button->GetPosition() );
- wxLogMessage( wxT("Position of \"Query position\" is %d %d"), pt.x, pt.y );
+ wxLogMessage( "Position of \"Query position\" is %d %d", pt.x, pt.y );
pt = ClientToScreen( pt );
- wxLogMessage( wxT("Position of \"Query position\" on screen is %d %d"), pt.x, pt.y );
+ wxLogMessage("Position of \"Query position\" on screen is %d %d",
+ pt.x, pt.y);
}
void MyCanvas::OnAddButton( wxCommandEvent &WXUNUSED(event) )
{
- wxLogMessage( wxT("Inserting button at position 10,70...") );
- wxButton *button = new wxButton( this, ID_NEWBUTTON, wxT("new button"), wxPoint(10,70), wxSize(80,25) );
+ wxLogMessage( "Inserting button at position 10,70..." );
+ wxButton *button = new wxButton( this, ID_NEWBUTTON, "new button",
+ wxPoint(10,70), wxSize(80,25) );
wxPoint pt( button->GetPosition() );
- wxLogMessage( wxT("-> Position after inserting %d %d"), pt.x, pt.y );
+ wxLogMessage( "-> Position after inserting %d %d", pt.x, pt.y );
}
void MyCanvas::OnDeleteButton( wxCommandEvent &WXUNUSED(event) )
{
- wxLogMessage( wxT("Deleting button inserted with \"Add button\"...") );
+ wxLogMessage( "Deleting button inserted with \"Add button\"..." );
wxWindow *win = FindWindow( ID_NEWBUTTON );
if (win)
win->Destroy();
else
- wxLogMessage( wxT("-> No window with id = ID_NEWBUTTON found.") );
+ wxLogMessage( "-> No window with id = ID_NEWBUTTON found." );
}
void MyCanvas::OnMoveButton( wxCommandEvent &event )
{
- wxLogMessage( wxT("Moving button 10 pixels downward..") );
+ wxLogMessage( "Moving button 10 pixels downward.." );
wxWindow *win = FindWindow( event.GetId() );
wxPoint pt( win->GetPosition() );
- wxLogMessage( wxT("-> Position before move is %d %d"), pt.x, pt.y );
+ wxLogMessage( "-> Position before move is %d %d", pt.x, pt.y );
win->Move( wxDefaultCoord, pt.y + 10 );
pt = win->GetPosition();
- wxLogMessage( wxT("-> Position after move is %d %d"), pt.x, pt.y );
+ wxLogMessage( "-> Position after move is %d %d", pt.x, pt.y );
}
void MyCanvas::OnScrollWin( wxCommandEvent &WXUNUSED(event) )
{
- wxLogMessage( wxT("Scrolling 2 units up.\nThe white square and the controls should move equally!") );
- int x,y;
- GetViewStart( &x, &y );
- Scroll( wxDefaultCoord, y+2 );
+ wxLogMessage("Scrolling 2 units up.\n"
+ "The white square and the controls should move equally!");
+ Scroll( wxDefaultCoord, GetViewStart().y+2 );
}
// ----------------------------------------------------------------------------
-// MyAutoScrollWindow
+// MySizerScrolledWindow
// ----------------------------------------------------------------------------
-const long ID_RESIZEBUTTON = wxNewId();
-const wxSize SMALL_BUTTON( 100, 50 );
-const wxSize LARGE_BUTTON( 300, 100 );
-
-BEGIN_EVENT_TABLE( MyAutoScrollWindow, wxScrolledWindow)
- EVT_BUTTON( ID_RESIZEBUTTON, MyAutoScrollWindow::OnResizeClick)
-END_EVENT_TABLE()
-
-MyAutoScrollWindow::MyAutoScrollWindow( wxWindow *parent )
- : wxScrolledWindow( parent, -1, wxDefaultPosition, wxDefaultSize,
- wxSUNKEN_BORDER|wxScrolledWindowStyle )
+MySizerScrolledWindow::MySizerScrolledWindow(wxWindow *parent)
+ : wxScrolledWindow(parent)
{
- SetBackgroundColour( wxT("GREEN") );
+ SetBackgroundColour( "GREEN" );
// Set the rate we'd like for scrolling.
SetScrollRate( 5, 5 );
- // Populate a sizer with a 'resizing' button and some
- // other static decoration
-
- wxFlexGridSizer *innersizer = new wxFlexGridSizer( 2, 2 );
-
- m_button = new wxButton( this,
- ID_RESIZEBUTTON,
- _T("Press me"),
- wxDefaultPosition,
- SMALL_BUTTON );
-
- // We need to do this here, because wxADJUST_MINSIZE below
- // will cause the initial size to be ignored for Best/Min size.
- // It would be nice to fix the sizers to handle this a little
- // more cleanly.
+ // Populate a sizer with a 'resizing' button and some other static
+ // decoration
- m_button->SetSizeHints( SMALL_BUTTON.GetWidth(), SMALL_BUTTON.GetHeight() );
+ wxFlexGridSizer *sizer = new wxFlexGridSizer(2);
- innersizer->Add( m_button,
- 0,
- wxALIGN_CENTER | wxALL | wxADJUST_MINSIZE,
- 20 );
+ m_button = new wxButton( this, wxID_RESIZE_FRAME, "Press me",
+ wxDefaultPosition, SMALL_BUTTON );
- innersizer->Add( new wxStaticText( this, wxID_ANY, _T("This is just") ),
- 0,
- wxALIGN_CENTER );
-
- innersizer->Add( new wxStaticText( this, wxID_ANY, _T("some decoration") ),
- 0,
- wxALIGN_CENTER );
-
- innersizer->Add( new wxStaticText( this, wxID_ANY, _T("for you to scroll...") ),
- 0,
- wxALIGN_CENTER );
+ sizer->Add(m_button, wxSizerFlags().Centre().Border(20));
+ sizer->Add(new wxStaticText(this, wxID_ANY, "This is just"),
+ wxSizerFlags().Centre());
+ sizer->Add(new wxStaticText(this, wxID_ANY, "some decoration"),
+ wxSizerFlags().Centre());
+ sizer->Add(new wxStaticText(this, wxID_ANY, "for you to scroll..."),
+ wxSizerFlags().Centre());
// Then use the sizer to set the scrolled region size.
- SetSizer( innersizer );
+ SetSizer( sizer );
+
+ Connect(wxID_RESIZE_FRAME, wxEVT_COMMAND_BUTTON_CLICKED,
+ wxCommandEventHandler(MySizerScrolledWindow::OnResizeClick));
}
-void MyAutoScrollWindow::OnResizeClick( wxCommandEvent &WXUNUSED( event ) )
+void MySizerScrolledWindow::OnResizeClick(wxCommandEvent &WXUNUSED(event))
{
// Arbitrarily resize the button to change the minimum size of
// the (scrolled) sizer.
- if( m_button->GetSize() == SMALL_BUTTON )
- m_button->SetSizeHints( LARGE_BUTTON.GetWidth(), LARGE_BUTTON.GetHeight() );
+ if ( m_button->GetSize() == SMALL_BUTTON )
+ m_button->SetSizeHints(LARGE_BUTTON);
else
- m_button->SetSizeHints( SMALL_BUTTON.GetWidth(), SMALL_BUTTON.GetHeight() );
+ m_button->SetSizeHints(SMALL_BUTTON);
// Force update layout and scrollbars, since nothing we do here
// necessarily generates a size event which would do it for us.
-
FitInside();
}
// MyFrame
// ----------------------------------------------------------------------------
-const long ID_QUIT = wxID_EXIT;
-const long ID_ABOUT = wxID_ABOUT;
-const long ID_DELETE_ALL = 100;
-const long ID_INSERT_NEW = 101;
+const wxWindowID Scroll_Test_Simple = wxWindow::NewControlId();
+const wxWindowID Scroll_Test_Canvas = wxWindow::NewControlId();
+const wxWindowID Scroll_Test_Sizers = wxWindow::NewControlId();
+const wxWindowID Scroll_Test_Sub = wxWindow::NewControlId();
+const wxWindowID Scroll_Test_Auto = wxWindow::NewControlId();
-IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
+const wxWindowID Scroll_TglBtn_Sync = wxWindow::NewControlId();
+const wxWindowID Scroll_Radio_ShowScrollbar = wxWindow::NewControlId();
BEGIN_EVENT_TABLE(MyFrame,wxFrame)
- EVT_MENU (ID_DELETE_ALL, MyFrame::OnDeleteAll)
- EVT_MENU (ID_INSERT_NEW, MyFrame::OnInsertNew)
- EVT_MENU (ID_ABOUT, MyFrame::OnAbout)
- EVT_MENU (ID_QUIT, MyFrame::OnQuit)
+ EVT_MENU(wxID_ABOUT, MyFrame::OnAbout)
+ EVT_MENU(wxID_EXIT, MyFrame::OnQuit)
+
+ EVT_MENU(Scroll_Test_Simple, MyFrame::OnTestSimple)
+ EVT_MENU(Scroll_Test_Canvas, MyFrame::OnTestCanvas)
+ EVT_MENU(Scroll_Test_Sizers, MyFrame::OnTestSizer)
+ EVT_MENU(Scroll_Test_Sub, MyFrame::OnTestSub)
+ EVT_MENU(Scroll_Test_Auto, MyFrame::OnTestAuto)
+
+ EVT_TOGGLEBUTTON(Scroll_TglBtn_Sync, MyFrame::OnToggleSync)
+ EVT_RADIOBOX(Scroll_Radio_ShowScrollbar, MyFrame::OnScrollbarVisibility)
END_EVENT_TABLE()
MyFrame::MyFrame()
- : wxFrame( (wxFrame *)NULL, wxID_ANY, _T("wxScrolledWindow sample"),
- wxPoint(20,20), wxSize(800,500) )
+ : wxFrame(NULL, wxID_ANY, "wxWidgets scroll sample")
{
- wxMenu *file_menu = new wxMenu();
- file_menu->Append( ID_DELETE_ALL, _T("Delete all"));
- file_menu->Append( ID_INSERT_NEW, _T("Insert new"));
- file_menu->Append( ID_ABOUT, _T("&About.."));
- file_menu->Append( ID_QUIT, _T("E&xit\tAlt-X"));
-
- wxMenuBar *menu_bar = new wxMenuBar();
- menu_bar->Append(file_menu, _T("&File"));
-
- SetMenuBar( menu_bar );
-
-#if wxUSE_STATUSBAR
- CreateStatusBar(2);
- int widths[] = { -1, 100 };
- SetStatusWidths( 2, widths );
-#endif // wxUSE_STATUSBAR
-
- wxBoxSizer *topsizer = new wxBoxSizer( wxHORIZONTAL );
- // subsizer splits topsizer down the middle
- wxBoxSizer *subsizer = new wxBoxSizer( wxVERTICAL );
-
- // Setting an explicit size here is superfluous, it will be overridden
- // by the sizer in any case.
- m_canvas = new MyCanvas( this, wxID_ANY, wxPoint(0,0), wxSize(100,100) );
-
- // This is done with ScrollRate/VirtualSize in MyCanvas ctor now,
- // both should produce identical results.
- //m_canvas->SetScrollbars( 10, 10, 50, 100 );
-
- subsizer->Add( m_canvas, 1, wxEXPAND );
- subsizer->Add( new MyAutoScrollWindow( this ), 1, wxEXPAND );
-
- wxSizer *sizerBtm = new wxBoxSizer(wxHORIZONTAL);
- sizerBtm->Add( new MyScrolledWindowDumb(this), 1, wxEXPAND );
- sizerBtm->Add( new MyScrolledWindowSmart(this), 1, wxEXPAND );
- subsizer->Add( sizerBtm, 1, wxEXPAND );
-
- topsizer->Add( subsizer, 1, wxEXPAND );
- topsizer->Add( new MyAutoTimedScrollingWindow( this ), 1, wxEXPAND );
-
- SetSizer( topsizer );
+ wxMenu *menuFile = new wxMenu;
+ menuFile->Append(wxID_ABOUT, "&About..");
+ menuFile->AppendSeparator();
+ menuFile->Append(wxID_EXIT, "E&xit\tAlt-X");
+
+ wxMenu *menuTest = new wxMenu;
+ menuTest->Append(Scroll_Test_Simple, "&Simple scroll window\tF1",
+ "Simplest possible scrolled window test.");
+ menuTest->Append(Scroll_Test_Canvas, "Scrolled window with &children\tF2",
+ "Scrolled window with controls on it.");
+ menuTest->Append(Scroll_Test_Sizers, "Scrolled window with si&zer\tF3",
+ "Scrolled window with children managed by sizer.");
+ menuTest->Append(Scroll_Test_Sub, "Scrolled s&ub-window\tF4",
+ "Window only part of which is scrolled.");
+ menuTest->Append(Scroll_Test_Auto, "&Auto-scrolled window\tF5",
+ "Window which scrolls when the mouse is held pressed "
+ "outside of it.");
+
+ wxMenuBar *mbar = new wxMenuBar;
+ mbar->Append(menuFile, "&File");
+ mbar->Append(menuTest, "&Test");
+
+ SetMenuBar( mbar );
+
+
+ wxPanel *panel = new wxPanel(this);
+
+ const wxSizerFlags flagsExpand(wxSizerFlags(1).Expand());
+
+ wxSizer *topsizer = new wxBoxSizer(wxVERTICAL);
+ topsizer->Add(new wxStaticText(panel, wxID_ANY,
+ "The windows below should behave in the same way, even though\n"
+ "they're implemented quite differently, see the code for details.\n"
+ "\n"
+ "The lines redrawn during odd/even repaint iterations are drawn in\n"
+ "red/blue colour to allow seeing immediately how much is repainted,\n"
+ "don't be surprised by this."),
+ wxSizerFlags().Centre().Border());
+
+ m_win1 = new MyScrolledWindowDumb(panel);
+ m_win2 = new MyScrolledWindowSmart(panel);
+
+ wxSizer *sizerScrollWin = new wxBoxSizer(wxHORIZONTAL);
+ sizerScrollWin->Add(m_win1, flagsExpand);
+ sizerScrollWin->Add(m_win2, flagsExpand);
+ topsizer->Add(sizerScrollWin, flagsExpand);
+
+ const wxSizerFlags
+ flagsHBorder(wxSizerFlags().Centre().Border(wxLEFT | wxRIGHT));
+
+ wxSizer *sizerBtns = new wxBoxSizer(wxHORIZONTAL);
+
+ // the radio buttons are in the same order as wxSHOW_SB_XXX values but
+ // offset by 1
+ const wxString visibilities[] = { "&never", "&default", "&always" };
+ wxRadioBox *radio = new wxRadioBox(panel, Scroll_Radio_ShowScrollbar,
+ "Left &scrollbar visibility: ",
+ wxDefaultPosition, wxDefaultSize,
+ WXSIZEOF(visibilities), visibilities);
+ radio->SetSelection(wxSHOW_SB_DEFAULT + 1);
+ sizerBtns->Add(radio, flagsHBorder);
+
+ sizerBtns->Add(new wxToggleButton(panel, Scroll_TglBtn_Sync, "S&ynchronize"),
+ flagsHBorder);
+
+ topsizer->Add(sizerBtns, wxSizerFlags().Centre().Border());
+
+ panel->SetSizer(topsizer);
+
+ wxSize size = panel->GetBestSize();
+ SetSizeHints(size);
+ SetClientSize(2*size);
+
+ Show();
}
-void MyFrame::OnDeleteAll( wxCommandEvent &WXUNUSED(event) )
+void MyFrame::OnToggleSync(wxCommandEvent& event)
{
- m_canvas->DestroyChildren();
+ if ( event.IsChecked() )
+ {
+ m_win1->SyncWith(m_win2);
+ m_win2->SyncWith(m_win1);
+ }
+ else
+ {
+ m_win1->SyncWith(NULL);
+ m_win2->SyncWith(NULL);
+ }
}
-void MyFrame::OnInsertNew( wxCommandEvent &WXUNUSED(event) )
+void MyFrame::OnScrollbarVisibility(wxCommandEvent& event)
{
- (void)new wxButton( m_canvas, wxID_ANY, _T("Hello"), wxPoint(100,100) );
+ m_win1->ShowScrollbars(wxSHOW_SB_NEVER,
+ wxScrollbarVisibility(event.GetSelection() - 1));
}
-void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
+void MyFrame::OnQuit(wxCommandEvent &WXUNUSED(event))
{
- Close( true );
+ Close(true);
}
void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
{
- (void)wxMessageBox( _T("wxScroll demo\n")
- _T("Robert Roebling (c) 1998\n")
- _T("Autoscrolling examples\n")
- _T("Ron Lee (c) 2002\n")
- _T("Auto-timed-scrolling example\n")
- _T("Matt Gregory (c) 2003\n"),
- _T("About wxScroll Demo"),
- wxICON_INFORMATION | wxOK );
+ (void)wxMessageBox( "wxScrolledWindow sample\n"
+ "\n"
+ "Robert Roebling (c) 1998\n"
+ "Vadim Zeitlin (c) 2008\n"
+ "Autoscrolling examples\n"
+ "Ron Lee (c) 2002\n"
+ "Auto-timed-scrolling example\n"
+ "Matt Gregory (c) 2003\n",
+ "About wxWidgets scroll sample",
+ wxICON_INFORMATION | wxOK );
}
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
// MyApp
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+
+IMPLEMENT_APP(MyApp)
bool MyApp::OnInit()
{
- wxFrame *frame = new MyFrame();
- frame->Show( true );
+ if ( !wxApp::OnInit() )
+ return false;
- return true;
+ new MyFrame();
+
+ return true;
}
// ----------------------------------------------------------------------------
static size_t s_redrawCount = 0;
dc.SetTextForeground(s_redrawCount++ % 2 ? *wxRED : *wxBLUE);
- wxCoord y = 0;
+ int y = 0;
for ( size_t line = 0; line < m_nLines; line++ )
{
- wxCoord yPhys;
+ int yPhys;
CalcScrolledPosition(0, y, NULL, &yPhys);
- dc.DrawText(wxString::Format(_T("Line %u (logical %d, physical %d)"),
- line, y, yPhys), 0, y);
+ dc.DrawText(wxString::Format("Line %u (logical %d, physical %d)",
+ unsigned(line), y, yPhys), 0, y);
y += m_hLine;
}
}
if ( lineTo > m_nLines - 1)
lineTo = m_nLines - 1;
- wxCoord y = lineFrom*m_hLine;
+ int y = lineFrom*m_hLine;
for ( size_t line = lineFrom; line <= lineTo; line++ )
{
- wxCoord yPhys;
+ int yPhys;
CalcScrolledPosition(0, y, NULL, &yPhys);
- dc.DrawText(wxString::Format(_T("Line %u (logical %d, physical %d)"),
- line, y, yPhys), 0, y);
+ dc.DrawText(wxString::Format("Line %u (logical %d, physical %d)",
+ unsigned(line), y, yPhys), 0, y);
y += m_hLine;
}
}
// ----------------------------------------------------------------------------
-// MyAutoTimedScrollingWindow
+// MyAutoScrollingWindow
// ----------------------------------------------------------------------------
-BEGIN_EVENT_TABLE(MyAutoTimedScrollingWindow, wxScrolledWindow)
- EVT_LEFT_DOWN(MyAutoTimedScrollingWindow::OnMouseLeftDown)
- EVT_LEFT_UP(MyAutoTimedScrollingWindow::OnMouseLeftUp)
- EVT_MOTION(MyAutoTimedScrollingWindow::OnMouseMove)
- EVT_SCROLLWIN(MyAutoTimedScrollingWindow::OnScroll)
+BEGIN_EVENT_TABLE(MyAutoScrollingWindow, wxScrolledWindow)
+ EVT_LEFT_DOWN(MyAutoScrollingWindow::OnMouseLeftDown)
+ EVT_LEFT_UP(MyAutoScrollingWindow::OnMouseLeftUp)
+ EVT_MOTION(MyAutoScrollingWindow::OnMouseMove)
+ EVT_MOUSE_CAPTURE_LOST(MyAutoScrollingWindow::OnMouseCaptureLost)
+ EVT_SCROLLWIN(MyAutoScrollingWindow::OnScroll)
END_EVENT_TABLE()
-MyAutoTimedScrollingWindow::MyAutoTimedScrollingWindow(wxWindow* parent)
- : wxScrolledWindow(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize
- //, wxSUNKEN_BORDER) // can't seem to do it this way
- , wxVSCROLL | wxHSCROLL | wxSUNKEN_BORDER)
- , m_selStart(-1, -1), m_cursor(-1, -1)
- , m_font(9, wxFONTFAMILY_TELETYPE, wxFONTSTYLE_NORMAL
- , wxFONTWEIGHT_NORMAL)
+MyAutoScrollingWindow::MyAutoScrollingWindow(wxWindow* parent)
+ : wxScrolledWindow(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize,
+ wxVSCROLL | wxHSCROLL | wxSUNKEN_BORDER),
+ m_selStart(-1, -1),
+ m_cursor(-1, -1),
+ m_font(9, wxFONTFAMILY_TELETYPE, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL)
{
wxClientDC dc(this);
// query dc for text size
dc.SetFont(m_font);
- dc.GetTextExtent(wxString(_T("A")), &m_fontW, &m_fontH);
+ dc.GetTextExtent(wxString("A"), &m_fontW, &m_fontH);
// set up the virtual window
SetScrollbars(m_fontW, m_fontH, sm_lineLen, sm_lineCnt);
}
-wxRect MyAutoTimedScrollingWindow::DeviceCoordsToGraphicalChars
- (wxRect updRect) const
+wxRect
+MyAutoScrollingWindow::DeviceCoordsToGraphicalChars(wxRect updRect) const
{
wxPoint pos(updRect.GetPosition());
pos = DeviceCoordsToGraphicalChars(pos);
return updRect;
}
-wxPoint MyAutoTimedScrollingWindow::DeviceCoordsToGraphicalChars
- (wxPoint pos) const
+wxPoint
+MyAutoScrollingWindow::DeviceCoordsToGraphicalChars(wxPoint pos) const
{
pos.x /= m_fontW;
pos.y /= m_fontH;
- int vX, vY;
- GetViewStart(&vX, &vY);
- pos.x += vX;
- pos.y += vY;
+ pos += GetViewStart();
return pos;
}
-wxPoint MyAutoTimedScrollingWindow::GraphicalCharToDeviceCoords
- (wxPoint pos) const
+wxPoint
+MyAutoScrollingWindow::GraphicalCharToDeviceCoords(wxPoint pos) const
{
- int vX, vY;
- GetViewStart(&vX, &vY);
- pos.x -= vX;
- pos.y -= vY;
+ pos -= GetViewStart();
pos.x *= m_fontW;
pos.y *= m_fontH;
return pos;
}
-wxRect MyAutoTimedScrollingWindow::LogicalCoordsToGraphicalChars
- (wxRect updRect) const
+wxRect
+MyAutoScrollingWindow::LogicalCoordsToGraphicalChars(wxRect updRect) const
{
wxPoint pos(updRect.GetPosition());
pos = LogicalCoordsToGraphicalChars(pos);
return updRect;
}
-wxPoint MyAutoTimedScrollingWindow::LogicalCoordsToGraphicalChars
- (wxPoint pos) const
+wxPoint
+MyAutoScrollingWindow::LogicalCoordsToGraphicalChars(wxPoint pos) const
{
pos.x /= m_fontW;
pos.y /= m_fontH;
return pos;
}
-wxPoint MyAutoTimedScrollingWindow::GraphicalCharToLogicalCoords
- (wxPoint pos) const
+wxPoint
+MyAutoScrollingWindow::GraphicalCharToLogicalCoords(wxPoint pos) const
{
pos.x *= m_fontW;
pos.y *= m_fontH;
return pos;
}
-void MyAutoTimedScrollingWindow::MyRefresh()
+void MyAutoScrollingWindow::MyRefresh()
{
static wxPoint lastSelStart(-1, -1), lastCursor(-1, -1);
// refresh last selected area (to deselect previously selected text)
updRect.width += m_fontW; // kludge
updRect.height += m_fontH; // kludge
// find necessary refresh areas
- wxCoord rx = lastUpdRect.x;
- wxCoord ry = lastUpdRect.y;
- wxCoord rw = updRect.x - lastUpdRect.x;
- wxCoord rh = lastUpdRect.height;
+ int rx = lastUpdRect.x;
+ int ry = lastUpdRect.y;
+ int rw = updRect.x - lastUpdRect.x;
+ int rh = lastUpdRect.height;
if (rw && rh) {
RefreshRect(DCNormalize(rx, ry, rw, rh));
}
lastCursor = m_cursor;
}
-bool MyAutoTimedScrollingWindow::IsSelected(int chX, int chY) const
+bool MyAutoScrollingWindow::IsSelected(int chX, int chY) const
{
if (IsInside(chX, m_selStart.x, m_cursor.x)
&& IsInside(chY, m_selStart.y, m_cursor.y)) {
return false;
}
-bool MyAutoTimedScrollingWindow::IsInside(int k, int bound1, int bound2)
+bool MyAutoScrollingWindow::IsInside(int k, int bound1, int bound2)
{
if ((k >= bound1 && k <= bound2) || (k >= bound2 && k <= bound1)) {
return true;
return false;
}
-wxRect MyAutoTimedScrollingWindow::DCNormalize(wxCoord x, wxCoord y
- , wxCoord w, wxCoord h)
+wxRect
+MyAutoScrollingWindow::DCNormalize(int x, int y, int w, int h)
{
// this is needed to get rid of the graphical remnants from the selection
// I think it's because DrawRectangle() excludes a pixel in either direction
return wxRect(x, y, w, h);
}
-void MyAutoTimedScrollingWindow::OnDraw(wxDC& dc)
+void MyAutoScrollingWindow::OnDraw(wxDC& dc)
{
dc.SetFont(m_font);
wxBrush normBrush(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW)
wxBrush selBrush(wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT)
, wxSOLID);
dc.SetPen(*wxTRANSPARENT_PEN);
- wxString str = sm_testData;
+ const wxString str = sm_testData;
+ size_t strLength = str.length();
+ wxString::const_iterator str_i;
// draw the characters
// 1. for each update region
for (int chY = updRectInGChars.y
; chY <= updRectInGChars.y + updRectInGChars.height; ++chY) {
// 3. for each character in the row
+ bool isFirstX = true;
for (int chX = updRectInGChars.x
; chX <= updRectInGChars.x + updRectInGChars.width
; ++chX) {
size_t charIndex = chY * sm_lineLen + chX;
if (chY < sm_lineCnt &&
chX < sm_lineLen &&
- charIndex < str.Length())
+ charIndex < strLength)
{
- dc.DrawText(str.Mid(charIndex,1),
- charPos.x, charPos.y);
+ if (isFirstX)
+ {
+ str_i = str.begin() + charIndex;
+ isFirstX = false;
+ }
+ dc.DrawText(*str_i, charPos.x, charPos.y);
+ ++str_i;
}
}
}
}
}
-void MyAutoTimedScrollingWindow::OnMouseLeftDown(wxMouseEvent& event)
+void MyAutoScrollingWindow::OnMouseLeftDown(wxMouseEvent& event)
{
// initial press of mouse button sets the beginning of the selection
m_selStart = DeviceCoordsToGraphicalChars(event.GetPosition());
MyRefresh();
}
-void MyAutoTimedScrollingWindow::OnMouseLeftUp(wxMouseEvent& WXUNUSED(event))
+void MyAutoScrollingWindow::OnMouseLeftUp(wxMouseEvent& WXUNUSED(event))
{
// this test is necessary
if (HasCapture()) {
}
}
-void MyAutoTimedScrollingWindow::OnMouseMove(wxMouseEvent& event)
+void MyAutoScrollingWindow::OnMouseMove(wxMouseEvent& event)
{
// if user is dragging
if (event.Dragging() && event.LeftIsDown()) {
}
}
-void MyAutoTimedScrollingWindow::OnScroll(wxScrollWinEvent& event)
+void
+MyAutoScrollingWindow::OnMouseCaptureLost(wxMouseCaptureLostEvent&
+ WXUNUSED(event))
+{
+ // we only capture mouse for timed scrolling, so nothing is needed here
+ // other than making sure to not call event.Skip()
+}
+
+void MyAutoScrollingWindow::OnScroll(wxScrollWinEvent& event)
{
// need to move the cursor when autoscrolling
// FIXME: the cursor also moves when the scrollbar arrows are clicked
event.Skip();
}
-const int MyAutoTimedScrollingWindow::sm_lineCnt = 125;
-const int MyAutoTimedScrollingWindow::sm_lineLen = 79;
-const wxChar* MyAutoTimedScrollingWindow::sm_testData =
-_T("162 Cult of the genius out of vanity. Because we think well of ourselves, but ")
-_T("nonetheless never suppose ourselves capable of producing a painting like one of ")
-_T("Raphael's or a dramatic scene like one of Shakespeare's, we convince ourselves ")
-_T("that the capacity to do so is quite extraordinarily marvelous, a wholly ")
-_T("uncommon accident, or, if we are still religiously inclined, a mercy from on ")
-_T("high. Thus our vanity, our self-love, promotes the cult of the genius: for only ")
-_T("if we think of him as being very remote from us, as a miraculum, does he not ")
-_T("aggrieve us (even Goethe, who was without envy, called Shakespeare his star of ")
-_T("the most distant heights [\"William! Stern der schonsten Ferne\": from Goethe's, ")
-_T("\"Between Two Worlds\"]; in regard to which one might recall the lines: \"the ")
-_T("stars, these we do not desire\" [from Goethe's, \"Comfort in Tears\"]). But, aside ")
-_T("from these suggestions of our vanity, the activity of the genius seems in no ")
-_T("way fundamentally different from the activity of the inventor of machines, the ")
-_T("scholar of astronomy or history, the master of tactics. All these activities ")
-_T("are explicable if one pictures to oneself people whose thinking is active in ")
-_T("one direction, who employ everything as material, who always zealously observe ")
-_T("their own inner life and that of others, who perceive everywhere models and ")
-_T("incentives, who never tire of combining together the means available to them. ")
-_T("Genius too does nothing except learn first how to lay bricks then how to build, ")
-_T("except continually seek for material and continually form itself around it. ")
-_T("Every activity of man is amazingly complicated, not only that of the genius: ")
-_T("but none is a \"miracle.\" Whence, then, the belief that genius exists only in ")
-_T("the artist, orator and philosopher? that only they have \"intuition\"? (Whereby ")
-_T("they are supposed to possess a kind of miraculous eyeglass with which they can ")
-_T("see directly into \"the essence of the thing\"!) It is clear that people speak of ")
-_T("genius only where the effects of the great intellect are most pleasant to them ")
-_T("and where they have no desire to feel envious. To call someone \"divine\" means: ")
-_T("\"here there is no need for us to compete.\" Then, everything finished and ")
-_T("complete is regarded with admiration, everything still becoming is undervalued. ")
-_T("But no one can see in the work of the artist how it has become; that is its ")
-_T("advantage, for wherever one can see the act of becoming one grows somewhat ")
-_T("cool. The finished and perfect art of representation repulses all thinking as ")
-_T("to how it has become; it tyrannizes as present completeness and perfection. ")
-_T("That is why the masters of the art of representation count above all as gifted ")
-_T("with genius and why men of science do not. In reality, this evaluation of the ")
-_T("former and undervaluation of the latter is only a piece of childishness in the ")
-_T("realm of reason. ")
-_T("\n\n")
-_T("163 The serious workman. Do not talk about giftedness, inborn talents! One can ")
-_T("name great men of all kinds who were very little gifted. The acquired ")
-_T("greatness, became \"geniuses\" (as we put it), through qualities the lack of ")
-_T("which no one who knew what they were would boast of: they all possessed that ")
-_T("seriousness of the efficient workman which first learns to construct the parts ")
-_T("properly before it ventures to fashion a great whole; they allowed themselves ")
-_T("time for it, because they took more pleasure in making the little, secondary ")
-_T("things well than in the effect of a dazzling whole. the recipe for becoming a ")
-_T("good novelist, for example, is easy to give, but to carry it out presupposes ")
-_T("qualities one is accustomed to overlook when one says \"I do not have enough ")
-_T("talent.\" One has only to make a hundred or so sketches for novels, none longer ")
-_T("than two pages but of such distinctness that every word in them is necessary; ")
-_T("one should write down anecdotes each day until one has learned how to give them ")
-_T("the most pregnant and effective form; one should be tireless in collecting and ")
-_T("describing human types and characters; one should above all relate things to ")
-_T("others and listen to others relate, keeping one's eyes and ears open for the ")
-_T("effect produced on those present, one should travel like a landscape painter or ")
-_T("costume designer; one should excerpt for oneself out of the individual sciences ")
-_T("everything that will produce an artistic effect when it is well described, one ")
-_T("should, finally, reflect on the motives of human actions, disdain no signpost ")
-_T("to instruction about them and be a collector of these things by day and night. ")
-_T("One should continue in this many-sided exercise some ten years: what is then ")
-_T("created in the workshop, however, will be fit to go out into the world. What, ")
-_T("however, do most people do? They begin, not with the parts, but with the whole. ")
-_T("Perhaps they chance to strike a right note, excite attention and from then on ")
-_T("strike worse and worse notes, for good, natural reasons. Sometimes, when the ")
-_T("character and intellect needed to formulate such a life-plan are lacking, fate ")
-_T("and need take their place and lead the future master step by step through all ")
-_T("the stipulations of his trade. ")
-_T("\n\n")
-_T("164 Peril and profit in the cult of the genius. The belief in great, superior, ")
-_T("fruitful spirits is not necessarily, yet nonetheless is very frequently ")
-_T("associated with that religious or semi-religious superstition that these ")
-_T("spirits are of supra-human origin and possess certain miraculous abilities by ")
-_T("virtue of which they acquire their knowledge by quite other means than the rest ")
-_T("of mankind. One ascribes to them, it seems, a direct view of the nature of the ")
-_T("world, as it were a hole in the cloak of appearance, and believes that, by ")
-_T("virtue of this miraculous seer's vision, they are able to communicate something ")
-_T("conclusive and decisive about man and the world without the toil and ")
-_T("rigorousness required by science. As long as there continue to be those who ")
-_T("believe in the miraculous in the domain of knowledge one can perhaps concede ")
-_T("that these people themselves derive some benefit from their belief, inasmuch as ")
-_T("through their unconditional subjection to the great spirits they create for ")
-_T("their own spirit during its time of development the finest form of discipline ")
-_T("and schooling. On the other hand, it is at least questionable whether the ")
-_T("superstitious belief in genius, in its privileges and special abilities, is of ")
-_T("benefit to the genius himself if it takes root in him. It is in any event a ")
-_T("dangerous sign when a man is assailed by awe of himself, whether it be the ")
-_T("celebrated Caesar's awe of Caesar or the awe of one's own genius now under ")
-_T("consideration; when the sacrificial incense which is properly rendered only to ")
-_T("a god penetrates the brain of the genius, so that his head begins to swim and ")
-_T("he comes to regard himself as something supra-human. The consequences that ")
-_T("slowly result are: the feeling of irresponsibility, of exceptional rights, the ")
-_T("belief that he confers a favor by his mere presence, insane rage when anyone ")
-_T("attempts even to compare him with others, let alone to rate him beneath them, ")
-_T("or to draw attention to lapses in his work. Because he ceases to practice ")
-_T("criticism of himself, at last one pinion after the other falls out of his ")
-_T("plumage: that superstitious eats at the roots of his powers and perhaps even ")
-_T("turns him into a hypocrite after his powers have fled from him. For the great ")
-_T("spirits themselves it is therefore probably more beneficial if they acquire an ")
-_T("insight into the nature and origin of their powers, if they grasp, that is to ")
-_T("say, what purely human qualities have come together in them and what fortunate ")
-_T("circumstances attended them: in the first place undiminished energy, resolute ")
-_T("application to individual goals, great personal courage, then the good fortune ")
-_T("to receive an upbringing which offered in the early years the finest teachers, ")
-_T("models and methods. To be sure, when their goal is the production of the ")
-_T("greatest possible effect, unclarity with regard to oneself and that ")
-_T("semi-insanity superadded to it has always achieved much; for what has been ")
-_T("admired and envied at all times has been that power in them by virtue of which ")
-_T("they render men will-less and sweep them away into the delusion that the ")
-_T("leaders they are following are supra-natural. Indeed, it elevates and inspires ")
-_T("men to believe that someone is in possession of supra-natural powers: to this ")
-_T("extent Plato was right to say [Plato: Phaedrus, 244a] that madness has brought ")
-_T("the greatest of blessings upon mankind. In rare individual cases this portion ")
-_T("of madness may, indeed, actually have been the means by which such a nature, ")
-_T("excessive in all directions, was held firmly together: in the life of ")
-_T("individuals, too, illusions that are in themselves poisons often play the role ")
-_T("of healers; yet, in the end, in the case of every \"genius\" who believes in his ")
-_T("own divinity the poison shows itself to the same degree as his \"genius\" grows ")
-_T("old: one may recall, for example, the case of Napoleon, whose nature certainly ")
-_T("grew into the mighty unity that sets him apart from all men of modern times ")
-_T("precisely through his belief in himself and his star and through the contempt ")
-_T("for men that flowed from it; until in the end, however, this same belief went ")
-_T("over into an almost insane fatalism, robbed him of his acuteness and swiftness ")
-_T("of perception, and became the cause of his destruction.");
+const int MyAutoScrollingWindow::sm_lineCnt = 125;
+const int MyAutoScrollingWindow::sm_lineLen = 79;
+const char *MyAutoScrollingWindow::sm_testData =
+"162 Cult of the genius out of vanity. Because we think well of ourselves, but "
+"nonetheless never suppose ourselves capable of producing a painting like one of "
+"Raphael's or a dramatic scene like one of Shakespeare's, we convince ourselves "
+"that the capacity to do so is quite extraordinarily marvelous, a wholly "
+"uncommon accident, or, if we are still religiously inclined, a mercy from on "
+"high. Thus our vanity, our self-love, promotes the cult of the genius: for only "
+"if we think of him as being very remote from us, as a miraculum, does he not "
+"aggrieve us (even Goethe, who was without envy, called Shakespeare his star of "
+"the most distant heights [\"William! Stern der schonsten Ferne\": from Goethe's, "
+"\"Between Two Worlds\"]; in regard to which one might recall the lines: \"the "
+"stars, these we do not desire\" [from Goethe's, \"Comfort in Tears\"]). But, aside "
+"from these suggestions of our vanity, the activity of the genius seems in no "
+"way fundamentally different from the activity of the inventor of machines, the "
+"scholar of astronomy or history, the master of tactics. All these activities "
+"are explicable if one pictures to oneself people whose thinking is active in "
+"one direction, who employ everything as material, who always zealously observe "
+"their own inner life and that of others, who perceive everywhere models and "
+"incentives, who never tire of combining together the means available to them. "
+"Genius too does nothing except learn first how to lay bricks then how to build, "
+"except continually seek for material and continually form itself around it. "
+"Every activity of man is amazingly complicated, not only that of the genius: "
+"but none is a \"miracle.\" Whence, then, the belief that genius exists only in "
+"the artist, orator and philosopher? that only they have \"intuition\"? (Whereby "
+"they are supposed to possess a kind of miraculous eyeglass with which they can "
+"see directly into \"the essence of the thing\"!) It is clear that people speak of "
+"genius only where the effects of the great intellect are most pleasant to them "
+"and where they have no desire to feel envious. To call someone \"divine\" means: "
+"\"here there is no need for us to compete.\" Then, everything finished and "
+"complete is regarded with admiration, everything still becoming is undervalued. "
+"But no one can see in the work of the artist how it has become; that is its "
+"advantage, for wherever one can see the act of becoming one grows somewhat "
+"cool. The finished and perfect art of representation repulses all thinking as "
+"to how it has become; it tyrannizes as present completeness and perfection. "
+"That is why the masters of the art of representation count above all as gifted "
+"with genius and why men of science do not. In reality, this evaluation of the "
+"former and undervaluation of the latter is only a piece of childishness in the "
+"realm of reason. "
+"\n\n"
+"163 The serious workman. Do not talk about giftedness, inborn talents! One can "
+"name great men of all kinds who were very little gifted. The acquired "
+"greatness, became \"geniuses\" (as we put it), through qualities the lack of "
+"which no one who knew what they were would boast of: they all possessed that "
+"seriousness of the efficient workman which first learns to construct the parts "
+"properly before it ventures to fashion a great whole; they allowed themselves "
+"time for it, because they took more pleasure in making the little, secondary "
+"things well than in the effect of a dazzling whole. the recipe for becoming a "
+"good novelist, for example, is easy to give, but to carry it out presupposes "
+"qualities one is accustomed to overlook when one says \"I do not have enough "
+"talent.\" One has only to make a hundred or so sketches for novels, none longer "
+"than two pages but of such distinctness that every word in them is necessary; "
+"one should write down anecdotes each day until one has learned how to give them "
+"the most pregnant and effective form; one should be tireless in collecting and "
+"describing human types and characters; one should above all relate things to "
+"others and listen to others relate, keeping one's eyes and ears open for the "
+"effect produced on those present, one should travel like a landscape painter or "
+"costume designer; one should excerpt for oneself out of the individual sciences "
+"everything that will produce an artistic effect when it is well described, one "
+"should, finally, reflect on the motives of human actions, disdain no signpost "
+"to instruction about them and be a collector of these things by day and night. "
+"One should continue in this many-sided exercise some ten years: what is then "
+"created in the workshop, however, will be fit to go out into the world. What, "
+"however, do most people do? They begin, not with the parts, but with the whole. "
+"Perhaps they chance to strike a right note, excite attention and from then on "
+"strike worse and worse notes, for good, natural reasons. Sometimes, when the "
+"character and intellect needed to formulate such a life-plan are lacking, fate "
+"and need take their place and lead the future master step by step through all "
+"the stipulations of his trade. "
+"\n\n"
+"164 Peril and profit in the cult of the genius. The belief in great, superior, "
+"fruitful spirits is not necessarily, yet nonetheless is very frequently "
+"associated with that religious or semi-religious superstition that these "
+"spirits are of supra-human origin and possess certain miraculous abilities by "
+"virtue of which they acquire their knowledge by quite other means than the rest "
+"of mankind. One ascribes to them, it seems, a direct view of the nature of the "
+"world, as it were a hole in the cloak of appearance, and believes that, by "
+"virtue of this miraculous seer's vision, they are able to communicate something "
+"conclusive and decisive about man and the world without the toil and "
+"rigorousness required by science. As long as there continue to be those who "
+"believe in the miraculous in the domain of knowledge one can perhaps concede "
+"that these people themselves derive some benefit from their belief, inasmuch as "
+"through their unconditional subjection to the great spirits they create for "
+"their own spirit during its time of development the finest form of discipline "
+"and schooling. On the other hand, it is at least questionable whether the "
+"superstitious belief in genius, in its privileges and special abilities, is of "
+"benefit to the genius himself if it takes root in him. It is in any event a "
+"dangerous sign when a man is assailed by awe of himself, whether it be the "
+"celebrated Caesar's awe of Caesar or the awe of one's own genius now under "
+"consideration; when the sacrificial incense which is properly rendered only to "
+"a god penetrates the brain of the genius, so that his head begins to swim and "
+"he comes to regard himself as something supra-human. The consequences that "
+"slowly result are: the feeling of irresponsibility, of exceptional rights, the "
+"belief that he confers a favor by his mere presence, insane rage when anyone "
+"attempts even to compare him with others, let alone to rate him beneath them, "
+"or to draw attention to lapses in his work. Because he ceases to practice "
+"criticism of himself, at last one pinion after the other falls out of his "
+"plumage: that superstitious eats at the roots of his powers and perhaps even "
+"turns him into a hypocrite after his powers have fled from him. For the great "
+"spirits themselves it is therefore probably more beneficial if they acquire an "
+"insight into the nature and origin of their powers, if they grasp, that is to "
+"say, what purely human qualities have come together in them and what fortunate "
+"circumstances attended them: in the first place undiminished energy, resolute "
+"application to individual goals, great personal courage, then the good fortune "
+"to receive an upbringing which offered in the early years the finest teachers, "
+"models and methods. To be sure, when their goal is the production of the "
+"greatest possible effect, unclarity with regard to oneself and that "
+"semi-insanity superadded to it has always achieved much; for what has been "
+"admired and envied at all times has been that power in them by virtue of which "
+"they render men will-less and sweep them away into the delusion that the "
+"leaders they are following are supra-natural. Indeed, it elevates and inspires "
+"men to believe that someone is in possession of supra-natural powers: to this "
+"extent Plato was right to say [Plato: Phaedrus, 244a] that madness has brought "
+"the greatest of blessings upon mankind. In rare individual cases this portion "
+"of madness may, indeed, actually have been the means by which such a nature, "
+"excessive in all directions, was held firmly together: in the life of "
+"individuals, too, illusions that are in themselves poisons often play the role "
+"of healers; yet, in the end, in the case of every \"genius\" who believes in his "
+"own divinity the poison shows itself to the same degree as his \"genius\" grows "
+"old: one may recall, for example, the case of Napoleon, whose nature certainly "
+"grew into the mighty unity that sets him apart from all men of modern times "
+"precisely through his belief in himself and his star and through the contempt "
+"for men that flowed from it; until in the end, however, this same belief went "
+"over into an almost insane fatalism, robbed him of his acuteness and swiftness "
+"of perception, and became the cause of his destruction.";
projects / wxWidgets.git / blobdiff