X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/fdd3ed7a8f5e43d44fffef5c7f857f6256dcc67a..14619f10b0bdb630206607abd0ce0319d45e095a:/samples/scroll/scroll.cpp?ds=inline diff --git a/samples/scroll/scroll.cpp b/samples/scroll/scroll.cpp index 677baca7c1..c31e0f45a7 100644 --- a/samples/scroll/scroll.cpp +++ b/samples/scroll/scroll.cpp @@ -1,172 +1,1479 @@ -/* - * Program: scroll - * - * Author: Robert Roebling - * - * Copyright: (C) 1998, Robert Roebling - * - */ - -// For compilers that support precompilation, includes "wx/wx.h". +///////////////////////////////////////////////////////////////////////////// +// Name: scroll.cpp +// Purpose: wxScrolled sample +// Author: Robert Roebling +// RCS-ID: $Id$ +// Copyright: (C) 1998 Robert Roebling, 2002 Ron Lee, 2003 Matt Gregory +// (C) 2008 Vadim Zeitlin +// Licence: wxWindows licence +///////////////////////////////////////////////////////////////////////////// + #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/sizer.h" +#include "wx/log.h" +#include "wx/tglbtn.h" + +#ifndef wxHAS_IMAGES_IN_RESOURCES + #include "../sample.xpm" #endif -#include "wx/image.h" +// ---------------------------------------------------------------------------- +// a trivial example +// ---------------------------------------------------------------------------- + +// MySimpleCanvas: a scrolled window which draws a simple rectangle +class MySimpleCanvas : public wxScrolled +{ +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 + }; + + MySimpleCanvas(wxWindow *parent) + : wxScrolled(parent, wxID_ANY) + { + SetScrollRate( 10, 10 ); + SetVirtualSize( WIDTH, HEIGHT ); + SetBackgroundColour( *wxWHITE ); + + Connect(wxEVT_PAINT, wxPaintEventHandler(MySimpleCanvas::OnPaint)); + } + +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: + MySimpleFrame(wxWindow *parent) + : wxFrame(parent, wxID_ANY, "MySimpleCanvas") + { + new MySimpleCanvas(this); + + // ensure that we have scrollbars initially + SetClientSize(MySimpleCanvas::WIDTH/2, MySimpleCanvas::HEIGHT/2); -// derived classes + Show(); + } +}; -class MyFrame; -class MyApp; +// ---------------------------------------------------------------------- +// a more complex example +// ---------------------------------------------------------------------- // MyCanvas +class MyCanvas : public wxScrolled +{ +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_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_MENU, + wxCommandEventHandler(MyCanvasFrame::OnDeleteAll)); + Connect(wxID_NEW, wxEVT_MENU, + 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; +}; + +// ---------------------------------------------------------------------------- +// example using sizers with wxScrolled +// ---------------------------------------------------------------------------- + +const wxSize SMALL_BUTTON( 100, 50 ); +const wxSize LARGE_BUTTON( 300, 200 ); + +class MySizerScrolledWindow : public wxScrolled +{ +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; + + void OnResizeClick(wxCommandEvent& event); +}; + +class MySizerFrame : public wxFrame +{ +public: + MySizerFrame(wxWindow *parent) + : wxFrame(parent, wxID_ANY, "MySizerScrolledWindow") + { + new MySizerScrolledWindow(this); + + // ensure that the scrollbars appear when the button becomes large + SetClientSize(LARGE_BUTTON/2); + Show(); + } +}; + +// ---------------------------------------------------------------------------- +// example showing scrolling only part of the window +// ---------------------------------------------------------------------------- + +// 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(wxScrolled *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); + } + + wxScrolled *m_owner; +}; + +class MySubRowLabels : public wxWindow +{ +public: + MySubRowLabels(wxScrolled *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); + } + + wxScrolled *m_owner; +}; + +class MySubCanvas : public wxPanel +{ +public: + MySubCanvas(wxScrolled *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); + } + } + } + + wxScrolled *m_owner; + wxWindow *m_colLabels, + *m_rowLabels; +}; + +class MySubScrolledWindow : public wxScrolled +{ +public: + enum + { + CORNER_WIDTH = 60, + CORNER_HEIGHT = 25 + }; + + MySubScrolledWindow(wxWindow *parent) + : wxScrolled(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(); + } +}; + +// ---------------------------------------------------------------------------- +// more simple examples of wxScrolled usage +// ---------------------------------------------------------------------------- + +// base class for both of them +class MyScrolledWindowBase : public wxScrolled +{ +public: + MyScrolledWindowBase(wxWindow *parent) + : wxScrolled(parent, wxID_ANY, + wxDefaultPosition, wxDefaultSize, + wxBORDER_SUNKEN) + { + m_nLines = 50; + m_winSync = NULL; + m_inDoSync = false; + + wxClientDC dc(this); + 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) + { + wxScrolled::ScrollWindow(dx, dy, rect); + + DoSyncIfNecessary(); + } + +protected: + // the height of one line on screen + 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 +// and sets the scrollbar extent directly. + +class MyScrolledWindowDumb : public MyScrolledWindowBase +{ +public: + MyScrolledWindowDumb(wxWindow *parent) : MyScrolledWindowBase(parent) + { + // no horz scrolling + SetScrollbars(0, m_hLine, 0, m_nLines + 1, 0, 0, true /* no refresh */); + } + + virtual void OnDraw(wxDC& dc); +}; -class MyCanvas: public wxScrolledWindow +// this class does "smart" redrawing - only redraws the lines which must be +// redrawn and sets the scroll rate and virtual size to affect the +// scrollbars. +// +// Note that this class should produce identical results to the one above. + +class MyScrolledWindowSmart : public MyScrolledWindowBase { public: - MyCanvas() {}; - MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size ); - ~MyCanvas(); - void OnPaint( wxPaintEvent &event ); + MyScrolledWindowSmart(wxWindow *parent) : MyScrolledWindowBase(parent) + { + // no horz scrolling + SetScrollRate( 0, m_hLine ); + SetVirtualSize( wxDefaultCoord, ( m_nLines + 1 ) * m_hLine ); + } + + virtual void OnDraw(wxDC& dc); +}; + +// ---------------------------------------------------------------------------- +// implements a text viewer with simple block selection to test auto-scrolling +// functionality +// ---------------------------------------------------------------------------- + +class MyAutoScrollingWindow : public wxScrolled +{ +public: + MyAutoScrollingWindow( wxWindow* parent ); + wxRect DeviceCoordsToGraphicalChars(wxRect updRect) const; + wxPoint DeviceCoordsToGraphicalChars(wxPoint pos) const; + wxPoint GraphicalCharToDeviceCoords(wxPoint pos) const; + wxRect LogicalCoordsToGraphicalChars(wxRect updRect) const; + wxPoint LogicalCoordsToGraphicalChars(wxPoint pos) const; + wxPoint GraphicalCharToLogicalCoords(wxPoint pos) const; + void MyRefresh(); + bool IsSelected(int chX, int chY) const; + static bool IsInside(int k, int bound1, int bound2); + static wxRect DCNormalize(int x, int y, int w, int h); + +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_DYNAMIC_CLASS(MyCanvas) DECLARE_EVENT_TABLE() }; -// MyFrame +class MyAutoFrame : public wxFrame +{ +public: + MyAutoFrame(wxWindow *parent) + : wxFrame(parent, wxID_ANY, "MyAutoScrollingWindow") + { + new MyAutoScrollingWindow(this); + + Show(); + } +}; + + +// ---------------------------------------------------------------------------- +// MyFrame: the main application frame showing all the classes above +// ---------------------------------------------------------------------------- class MyFrame: public wxFrame { public: MyFrame(); - void OnAbout( wxCommandEvent &event ); - void OnQuit( 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; + 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) +// ============================================================================ +// implementation +// ============================================================================ +// ---------------------------------------------------------------------------- // MyCanvas +// ---------------------------------------------------------------------------- + +const wxWindowIDRef ID_ADDBUTTON = wxWindow::NewControlId(); +const wxWindowIDRef ID_DELBUTTON = wxWindow::NewControlId(); +const wxWindowIDRef ID_MOVEBUTTON = wxWindow::NewControlId(); +const wxWindowIDRef ID_SCROLLWIN = wxWindow::NewControlId(); +const wxWindowIDRef ID_QUERYPOS = wxWindow::NewControlId(); -IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow) +const wxWindowIDRef ID_NEWBUTTON = wxWindow::NewControlId(); -BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow) - EVT_PAINT(MyCanvas::OnPaint) +BEGIN_EVENT_TABLE(MyCanvas, wxScrolled) + 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 ) -{ - (void) new wxButton( this, -1, "wxButton", wxPoint(10,10) ); - - (void) new wxTextCtrl( this, -1, "wxTextCtrl", wxPoint(10,50) ); - - (void) new wxCheckBox( this, -1, "Disable", wxPoint(10,90) ); - - wxString choices[] = - { - "This", - "is one of my", - "really", - "wonderful", - "examples." - }; - - (void) new wxComboBox( this, -1, "This", wxPoint(10,130), wxDefaultSize, 5, choices ); - - (void) new wxRadioBox( this, -1, "This", wxPoint(10,200), wxDefaultSize, 5, choices ); +MyCanvas::MyCanvas(wxWindow *parent) + : wxScrolled(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, "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) ); + + wxPanel *test = new wxPanel( this, wxID_ANY, + wxPoint(10, 110), wxSize(130,50), + wxSIMPLE_BORDER | wxTAB_TRAVERSAL ); + test->SetBackgroundColour( "WHEAT" ); + + SetBackgroundColour( "BLUE" ); } -MyCanvas::~MyCanvas() +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::OnMouseWheel( wxMouseEvent &event ) +{ + 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() ); + + event.Skip(); } void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) ) { - wxPaintDC dc( this ); - PrepareDC( dc ); + wxPaintDC dc( this ); + PrepareDC( dc ); + + dc.DrawText( "Press right mouse button to test calculations!", 160, 50 ); + + dc.DrawText( "Some text", 140, 140 ); + + dc.DrawRectangle( 100, 160, 200, 200 ); +} + +void MyCanvas::OnQueryPosition( wxCommandEvent &WXUNUSED(event) ) +{ + wxPoint pt( m_button->GetPosition() ); + wxLogMessage( "Position of \"Query position\" is %d %d", pt.x, pt.y ); + pt = ClientToScreen( pt ); + wxLogMessage("Position of \"Query position\" on screen is %d %d", + pt.x, pt.y); +} - dc.DrawText( "Some text", 10, 10 ); - - dc.DrawRectangle( 50, 30, 200, 200 ); +void MyCanvas::OnAddButton( wxCommandEvent &WXUNUSED(event) ) +{ + 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( "-> Position after inserting %d %d", pt.x, pt.y ); } +void MyCanvas::OnDeleteButton( wxCommandEvent &WXUNUSED(event) ) +{ + wxLogMessage( "Deleting button inserted with \"Add button\"..." ); + wxWindow *win = FindWindow( ID_NEWBUTTON ); + if (win) + win->Destroy(); + else + wxLogMessage( "-> No window with id = ID_NEWBUTTON found." ); +} + +void MyCanvas::OnMoveButton( wxCommandEvent &event ) +{ + wxLogMessage( "Moving button 10 pixels downward.." ); + wxWindow *win = FindWindow( event.GetId() ); + wxPoint pt( win->GetPosition() ); + wxLogMessage( "-> Position before move is %d %d", pt.x, pt.y ); + win->Move( wxDefaultCoord, pt.y + 10 ); + pt = win->GetPosition(); + wxLogMessage( "-> Position after move is %d %d", pt.x, pt.y ); +} + +void MyCanvas::OnScrollWin( wxCommandEvent &WXUNUSED(event) ) +{ + wxLogMessage("Scrolling 2 units up.\n" + "The white square and the controls should move equally!"); + Scroll( wxDefaultCoord, GetViewStart().y+2 ); +} + +// ---------------------------------------------------------------------------- +// MySizerScrolledWindow +// ---------------------------------------------------------------------------- + +MySizerScrolledWindow::MySizerScrolledWindow(wxWindow *parent) + : wxScrolled(parent) +{ + 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 *sizer = new wxFlexGridSizer(2); + + m_button = new wxButton( this, wxID_RESIZE_FRAME, "Press me", + wxDefaultPosition, SMALL_BUTTON ); + + sizer->Add(m_button, wxSizerFlags().Centre().Border(wxALL, 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( sizer ); + + Connect(wxID_RESIZE_FRAME, wxEVT_BUTTON, + wxCommandEventHandler(MySizerScrolledWindow::OnResizeClick)); +} + +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); + else + 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 int ID_QUIT = 108; -const int ID_ABOUT = 109; +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_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, -1, "wxScrolledWindow sample", - wxPoint(20,20), wxSize(470,360) ) + : wxFrame(NULL, wxID_ANY, "wxWidgets scroll sample") { - wxMenu *file_menu = new wxMenu(); - file_menu->Append( ID_ABOUT, "&About.."); - file_menu->Append( ID_QUIT, "E&xit\tAlt-X"); + SetIcon(wxICON(sample)); + + 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); - wxMenuBar *menu_bar = new wxMenuBar(); - menu_bar->Append(file_menu, "&File"); + sizerBtns->Add(new wxToggleButton(panel, Scroll_TglBtn_Sync, "S&ynchronize"), + flagsHBorder); - SetMenuBar( menu_bar ); + topsizer->Add(sizerBtns, wxSizerFlags().Centre().Border()); - CreateStatusBar(2); - int widths[] = { -1, 100 }; - SetStatusWidths( 2, widths ); + panel->SetSizer(topsizer); - m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) ); - m_canvas->SetScrollbars( 10, 10, 50, 100 ); + wxSize size = panel->GetBestSize(); + SetSizeHints(size); + SetClientSize(2*size); + + Show(); +} + +void MyFrame::OnToggleSync(wxCommandEvent& event) +{ + if ( event.IsChecked() ) + { + m_win1->SyncWith(m_win2); + m_win2->SyncWith(m_win1); + } + else + { + m_win1->SyncWith(NULL); + m_win2->SyncWith(NULL); + } } -void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) ) +void MyFrame::OnScrollbarVisibility(wxCommandEvent& event) { - Close( TRUE ); + m_win1->ShowScrollbars(wxSHOW_SB_NEVER, + wxScrollbarVisibility(event.GetSelection() - 1)); +} + +void MyFrame::OnQuit(wxCommandEvent &WXUNUSED(event)) +{ + Close(true); } void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) ) { - (void)wxMessageBox( "wxScroll demo\n" - "Robert Roebling (c) 1998", - "About wxScroll Demo", wxICON_INFORMATION | wxOK ); + (void)wxMessageBox( "Scrolled window 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; + + new MyFrame(); + + return true; +} + +// ---------------------------------------------------------------------------- +// MyScrolledWindowXXX +// ---------------------------------------------------------------------------- + +void MyScrolledWindowDumb::OnDraw(wxDC& dc) +{ + // this is useful to see which lines are redrawn + static size_t s_redrawCount = 0; + dc.SetTextForeground(s_redrawCount++ % 2 ? *wxRED : *wxBLUE); + + int y = 0; + for ( size_t line = 0; line < m_nLines; line++ ) + { + int yPhys; + CalcScrolledPosition(0, y, NULL, &yPhys); + + dc.DrawText(wxString::Format("Line %u (logical %d, physical %d)", + unsigned(line), y, yPhys), 0, y); + y += m_hLine; + } +} + +void MyScrolledWindowSmart::OnDraw(wxDC& dc) +{ + // this is useful to see which lines are redrawn + static size_t s_redrawCount = 0; + dc.SetTextForeground(s_redrawCount++ % 2 ? *wxRED : *wxBLUE); + + // update region is always in device coords, translate to logical ones + wxRect rectUpdate = GetUpdateRegion().GetBox(); + CalcUnscrolledPosition(rectUpdate.x, rectUpdate.y, + &rectUpdate.x, &rectUpdate.y); + + size_t lineFrom = rectUpdate.y / m_hLine, + lineTo = rectUpdate.GetBottom() / m_hLine; + + if ( lineTo > m_nLines - 1) + lineTo = m_nLines - 1; + + int y = lineFrom*m_hLine; + for ( size_t line = lineFrom; line <= lineTo; line++ ) + { + int yPhys; + CalcScrolledPosition(0, y, NULL, &yPhys); + + dc.DrawText(wxString::Format("Line %u (logical %d, physical %d)", + unsigned(line), y, yPhys), 0, y); + y += m_hLine; + } +} + +// ---------------------------------------------------------------------------- +// MyAutoScrollingWindow +// ---------------------------------------------------------------------------- + +BEGIN_EVENT_TABLE(MyAutoScrollingWindow, wxScrolled) + 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() + +MyAutoScrollingWindow::MyAutoScrollingWindow(wxWindow* parent) + : wxScrolled(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("A"), &m_fontW, &m_fontH); + // set up the virtual window + SetScrollbars(m_fontW, m_fontH, sm_lineLen, sm_lineCnt); +} + +wxRect +MyAutoScrollingWindow::DeviceCoordsToGraphicalChars(wxRect updRect) const +{ + wxPoint pos(updRect.GetPosition()); + pos = DeviceCoordsToGraphicalChars(pos); + updRect.x = pos.x; + updRect.y = pos.y; + updRect.width /= m_fontW; + updRect.height /= m_fontH; + // the *CoordsToGraphicalChars() funcs round down to upper-left corner, + // so an off-by-one correction is needed + ++updRect.width; // kludge + ++updRect.height; // kludge + return updRect; +} + +wxPoint +MyAutoScrollingWindow::DeviceCoordsToGraphicalChars(wxPoint pos) const +{ + pos.x /= m_fontW; + pos.y /= m_fontH; + pos += GetViewStart(); + return pos; +} - return TRUE; +wxPoint +MyAutoScrollingWindow::GraphicalCharToDeviceCoords(wxPoint pos) const +{ + pos -= GetViewStart(); + pos.x *= m_fontW; + pos.y *= m_fontH; + return pos; +} + +wxRect +MyAutoScrollingWindow::LogicalCoordsToGraphicalChars(wxRect updRect) const +{ + wxPoint pos(updRect.GetPosition()); + pos = LogicalCoordsToGraphicalChars(pos); + updRect.x = pos.x; + updRect.y = pos.y; + updRect.width /= m_fontW; + updRect.height /= m_fontH; + // the *CoordsToGraphicalChars() funcs round down to upper-left corner, + // so an off-by-one correction is needed + ++updRect.width; // kludge + ++updRect.height; // kludge + return updRect; +} + +wxPoint +MyAutoScrollingWindow::LogicalCoordsToGraphicalChars(wxPoint pos) const +{ + pos.x /= m_fontW; + pos.y /= m_fontH; + return pos; +} + +wxPoint +MyAutoScrollingWindow::GraphicalCharToLogicalCoords(wxPoint pos) const +{ + pos.x *= m_fontW; + pos.y *= m_fontH; + return pos; +} + +void MyAutoScrollingWindow::MyRefresh() +{ + static wxPoint lastSelStart(-1, -1), lastCursor(-1, -1); + // refresh last selected area (to deselect previously selected text) + wxRect lastUpdRect( + GraphicalCharToDeviceCoords(lastSelStart), + GraphicalCharToDeviceCoords(lastCursor) + ); + // off-by-one corrections, necessary because it's not possible to know + // when to round up until rect is normalized by lastUpdRect constructor + lastUpdRect.width += m_fontW; // kludge + lastUpdRect.height += m_fontH; // kludge + // refresh currently selected (to select previously unselected text) + wxRect updRect( + GraphicalCharToDeviceCoords(m_selStart), + GraphicalCharToDeviceCoords(m_cursor) + ); + // off-by-one corrections + updRect.width += m_fontW; // kludge + updRect.height += m_fontH; // kludge + // find necessary refresh areas + 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)); + } + rx = updRect.x; + ry = updRect.y + updRect.height; + rw= updRect.width; + rh = (lastUpdRect.y + lastUpdRect.height) - (updRect.y + updRect.height); + if (rw && rh) { + RefreshRect(DCNormalize(rx, ry, rw, rh)); + } + rx = updRect.x + updRect.width; + ry = lastUpdRect.y; + rw = (lastUpdRect.x + lastUpdRect.width) - (updRect.x + updRect.width); + rh = lastUpdRect.height; + if (rw && rh) { + RefreshRect(DCNormalize(rx, ry, rw, rh)); + } + rx = updRect.x; + ry = lastUpdRect.y; + rw = updRect.width; + rh = updRect.y - lastUpdRect.y; + if (rw && rh) { + RefreshRect(DCNormalize(rx, ry, rw, rh)); + } + // update last + lastSelStart = m_selStart; + lastCursor = m_cursor; +} + +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 true; + } + return false; +} + +bool MyAutoScrollingWindow::IsInside(int k, int bound1, int bound2) +{ + if ((k >= bound1 && k <= bound2) || (k >= bound2 && k <= bound1)) { + return true; + } + return false; +} + +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 + const int kludge = 1; + // make (x, y) the top-left corner + if (w < 0) { + w = -w + kludge; + x -= w; + } else { + x -= kludge; + w += kludge; + } + if (h < 0) { + h = -h + kludge; + y -= h; + } else { + y -= kludge; + h += kludge; + } + return wxRect(x, y, w, h); +} + +void MyAutoScrollingWindow::OnDraw(wxDC& dc) +{ + dc.SetFont(m_font); + wxBrush normBrush(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW)); + wxBrush selBrush(wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT)); + dc.SetPen(*wxTRANSPARENT_PEN); + const wxString str = sm_testData; + size_t strLength = str.length(); + wxString::const_iterator str_i = str.begin(); + + // draw the characters + // 1. for each update region + for (wxRegionIterator upd(GetUpdateRegion()); upd; ++upd) { + wxRect updRect = upd.GetRect(); + wxRect updRectInGChars(DeviceCoordsToGraphicalChars(updRect)); + // 2. for each row of chars in the 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) { + // 4. set up dc + if (IsSelected(chX, chY)) { + dc.SetBrush(selBrush); + dc.SetTextForeground( wxSystemSettings::GetColour + (wxSYS_COLOUR_HIGHLIGHTTEXT)); + } else { + dc.SetBrush(normBrush); + dc.SetTextForeground( wxSystemSettings::GetColour + (wxSYS_COLOUR_WINDOWTEXT)); + } + // 5. find position info + wxPoint charPos = GraphicalCharToLogicalCoords(wxPoint + (chX, chY)); + // 6. draw! + dc.DrawRectangle(charPos.x, charPos.y, m_fontW, m_fontH); + size_t charIndex = chY * sm_lineLen + chX; + if (chY < sm_lineCnt && + chX < sm_lineLen && + charIndex < strLength) + { + if (isFirstX) + { + str_i = str.begin() + charIndex; + isFirstX = false; + } + dc.DrawText(*str_i, charPos.x, charPos.y); + ++str_i; + } + } + } + } +} + +void MyAutoScrollingWindow::OnMouseLeftDown(wxMouseEvent& event) +{ + // initial press of mouse button sets the beginning of the selection + m_selStart = DeviceCoordsToGraphicalChars(event.GetPosition()); + // set the cursor to the same position + m_cursor = m_selStart; + // draw/erase selection + MyRefresh(); +} + +void MyAutoScrollingWindow::OnMouseLeftUp(wxMouseEvent& WXUNUSED(event)) +{ + // this test is necessary + if (HasCapture()) { + // uncapture mouse + ReleaseMouse(); + } +} + +void MyAutoScrollingWindow::OnMouseMove(wxMouseEvent& event) +{ + // if user is dragging + if (event.Dragging() && event.LeftIsDown()) { + // set the new cursor position + m_cursor = DeviceCoordsToGraphicalChars(event.GetPosition()); + // draw/erase selection + MyRefresh(); + // capture mouse to activate auto-scrolling + if (!HasCapture()) { + CaptureMouse(); + } + } +} + +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 + if (HasCapture()) { + if (event.GetOrientation() == wxHORIZONTAL) { + if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP) { + --m_cursor.x; + } else if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN) { + ++m_cursor.x; + } + } else if (event.GetOrientation() == wxVERTICAL) { + if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP) { + --m_cursor.y; + } else if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN) { + ++m_cursor.y; + } + } + } + MyRefresh(); + event.Skip(); } +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.";