toolwnd.cpp

wxGTK 是 wxWidgets 的 linux GTK+ (>2.2.3)版本。wxWidgets 是一个跨平台的 GUI 框架

/////////////////////////////////////////////////////////////////////////////
// Name:        toolwnd.cpp
// Purpose:     wxToolWindow implementation.
// Author:      Aleksandras Gluchovas
// Modified by:
// Created:     06/09/98
// RCS-ID:      $Id: toolwnd.cpp,v 1.19 2005/09/23 12:47:44 MR Exp $
// Copyright:   (c) Aleksandras Gluchovas
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif

#include "wx/fl/toolwnd.h"

#define _IMG_A  0xAA    // Note: modified from _A to _IMG_A, _A was already defined (cygwin)
#define _IMG_B  0x00    // Note: modified from _B to _IMG_A, _B was already defined (cygwin)
#define _IMG_C  0x55    // Note: modified from _C to _IMG_C, for consistency reasons.
#define _IMG_D  0x00    // Note: modified from _D to _IMG_D, for consistency reasons.

// FOR NOW:: static

static const unsigned char _gCheckerImg[16] = { _IMG_A,_IMG_B,_IMG_C,_IMG_D,
                                                _IMG_A,_IMG_B,_IMG_C,_IMG_D,
                                                _IMG_A,_IMG_B,_IMG_C,_IMG_D,
                                                _IMG_A,_IMG_B,_IMG_C,_IMG_D
                                              };

/***** Implementation for class wxToolWindow *****/

IMPLEMENT_DYNAMIC_CLASS( wxToolWindow, wxFrame)

BEGIN_EVENT_TABLE( wxToolWindow, wxFrame )

    EVT_PAINT    ( wxToolWindow::OnPaint )
    EVT_MOTION   ( wxToolWindow::OnMotion )
    EVT_LEFT_DOWN( wxToolWindow::OnLeftDown )
    EVT_LEFT_UP  ( wxToolWindow::OnLeftUp )
    EVT_SIZE     ( wxToolWindow::OnSize )


    EVT_ERASE_BACKGROUND( wxToolWindow::OnEraseBackground )

END_EVENT_TABLE()

enum INTERNAL_HIT_CODES
{
    HITS_WND_NOTHING,
    HITS_WND_CLIENT,
    HITS_WND_TITLE,

    HITS_WND_LEFT_EDGE,
    HITS_WND_RIGHT_EDGE,
    HITS_WND_TOP_EDGE,
    HITS_WND_BOTTOM_EDGE,

    HITS_WND_TOP_LEFT_CORNER,
    HITS_WND_BOTTOM_RIGHT_CORNER,
    HITS_WND_TOP_RIGHT_CORNER,
    HITS_WND_BOTTOM_LEFT_CORNER
};

wxToolWindow::wxToolWindow()

    : mpClientWnd   ( NULL ),

#ifndef __WXMSW__
    mTitleFont( 8, wxSWISS,  wxNORMAL, wxNORMAL ),
#else
    // just to simulate MS-Dev style
    mTitleFont( 8, wxSWISS,  wxNORMAL, wxNORMAL, false, wxT("MS Sans Serif") ),
#endif

    mTitleHeight  ( 16 ),
    mClntHorizGap ( 2 ),
    mClntVertGap  ( 2 ),
    mWndVertGap   ( 4 ),
    mWndHorizGap  ( 4 ),

    mButtonGap    ( 2 ),
    mInTitleMargin( 4 ),
    mHintBorder   ( 4 ),

    mResizeStarted( false ),
    mRealTimeUpdatesOn( true ),

    mMTolerance   ( 5 ), // mouse-resizing tollerance

    mCursorType( HITS_WND_NOTHING ),
    mMouseCaptured( false ),

    mpScrDc( NULL )

{
}

wxToolWindow::~wxToolWindow()
{
    if ( mpScrDc ) delete mpScrDc;

    for( size_t i = 0; i != mButtons.Count(); ++i )
        delete mButtons[i];
}

void wxToolWindow::LayoutMiniButtons()
{
    int w,h;

    GetSize( &w, &h );

    int x = w - mWndHorizGap - mInTitleMargin - BTN_BOX_WIDTH;
    int y = mWndVertGap + 2;

    for( size_t i = 0; i != mButtons.Count(); ++i )
    {
        mButtons[i]->SetPos( wxPoint( x,y ) );
        x-= BTN_BOX_WIDTH + mButtonGap;
    }
}

void wxToolWindow::SetClient( wxWindow* pWnd )
{
    mpClientWnd = pWnd;
}

wxWindow* wxToolWindow::GetClient()
{
    return mpClientWnd;
}

void wxToolWindow::SetTitleFont( wxFont& font )
{
    mTitleFont = font;
}

void wxToolWindow::AddMiniButton( cbMiniButton* pBtn )
{
    pBtn->mpWnd = this;

    mButtons.Add( pBtn );

    // not necesserely now..
    //LayoutMiniButtons();
}

void wxToolWindow::OnPaint( wxPaintEvent& WXUNUSED(event) )
{
    wxPaintDC pdc( this );
    wxWindowDC dc( this );

    int w,h;
    GetSize( &w, &h );

    wxBrush backGround( wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE), wxSOLID );
    //dc.SetBrush( *wxLIGHT_GREY_BRUSH );
    dc.SetBrush( backGround );
    dc.SetPen( *wxTRANSPARENT_PEN );

    int y = mWndVertGap + mTitleHeight + mClntVertGap;

    dc.DrawRectangle( 0,0, w, y );                                      // Top grey part.
    dc.DrawRectangle( 0,y-1, mWndHorizGap + mClntHorizGap, h - y );     // Left grey part.
    dc.DrawRectangle( w - ( mWndHorizGap + mClntHorizGap ), y-1,
                      mWndHorizGap + mClntHorizGap, h - y );            // Right grey part.
    dc.DrawRectangle( 0, h - mWndVertGap - mClntVertGap, w, mWndVertGap + mClntVertGap ); // Bottom grey part.

    // draw shades
    dc.SetPen( *wxLIGHT_GREY_PEN );

    dc.DrawLine( 0,0, w, 0 );
    dc.DrawLine( 0,0, 0, h );

    dc.SetPen( *wxWHITE_PEN );

    dc.DrawLine( 1,1, w, 1 );
    dc.DrawLine( 1,2, 1, h );

    dc.SetPen( *wxGREY_PEN );

    dc.DrawLine( w - 2, 1, w - 2, h - 1 );
    dc.DrawLine( 1, h - 2, w - 2, h - 2 );

    dc.SetPen( *wxBLACK_PEN );

    dc.DrawLine( 0, h - 1, w, h - 1 );
    dc.DrawLine( w-1, 0, w-1, h );

    // fill inner area

    dc.SetBrush( *wxTheBrushList->FindOrCreateBrush( wxColour( 0,0,128 ), wxSOLID ) );

    dc.DrawRectangle( mWndHorizGap, mWndVertGap, w - mWndHorizGap*2, mTitleHeight );

    dc.SetFont( mTitleFont );

    for( size_t i = 0; i != mButtons.Count(); ++i )
        mButtons[i]->Draw( dc );

    int x1 = mWndHorizGap + mClntHorizGap;
    int x2 = mButtons[ mButtons.GetCount() - 1 ]->mPos.x - mClntHorizGap*2;

    dc.SetClippingRegion( x1, mWndVertGap + mClntVertGap, x2 - x1, mTitleHeight );

    dc.SetTextForeground( *wxWHITE );
    dc.SetBackgroundMode(  wxTRANSPARENT );
    dc.DrawText( GetTitle(), mWndHorizGap + 2, mWndVertGap + 1 );
}

void wxToolWindow::GetScrWindowRect( wxRect& r )
{
    int x,y;
    GetPosition(&x,&y);
    int w,h;
    GetSize( &w, &h );

    r.x = x; r.y = y;
    r.width = w; r.height = h;
}

void wxToolWindow::GetScrMousePos( wxMouseEvent& event, wxPoint& pos )
{
    int x = event.m_x, y = event.m_y;

    ClientToScreen( &x, &y );

    pos.x = x; pos.y = y;
}

int wxToolWindow::HitTestWindow( wxMouseEvent& event )
{
    wxPoint pos;
    wxRect r;

    GetScrMousePos( event, pos );
    GetScrWindowRect( r );

    int k = mMTolerance;

    if ( !( pos.x >= r.x && pos.y >= r.y &&
            pos.x < r.x + r.width &&
            pos.y < r.y + r.height )
       )
        return HITS_WND_NOTHING;

    if ( pos.y <= r.y + k )
    {
        if ( pos.x < r.x + k*2 )
            return HITS_WND_TOP_LEFT_CORNER;
        else
        {
            if ( pos.x >= r.x + r.width - k*2 )
                return HITS_WND_TOP_RIGHT_CORNER;
            else
                return HITS_WND_TOP_EDGE;
        }
    }
    else
    {
        if ( pos.y >= r.y + r.height - k )
        {
            if ( pos.x < r.x + k*2 )
                return HITS_WND_BOTTOM_LEFT_CORNER;
            else
            {
                if ( pos.x > r.x + r.width - k*2 )
                    return HITS_WND_BOTTOM_RIGHT_CORNER;
                else
                    return HITS_WND_BOTTOM_EDGE;
            }
        }
        else
        {
            if ( pos.x <= r.x + k )
                return HITS_WND_LEFT_EDGE;
            else
            {
                if ( pos.x >= r.x + r.width - k )
                    return HITS_WND_RIGHT_EDGE;
                else
                {
                    if ( pos.y <= r.y + mWndVertGap + mTitleHeight + mClntVertGap )
                        return HITS_WND_TITLE;
                    else
                        return HITS_WND_CLIENT;
                }
            }
        }
    }
}

void wxToolWindow::DrawHintRect( const wxRect& r )
{
    // BUG BUG BUG (wx):: somehow stippled brush works only
    //                    when the bitmap created on stack, not
    //                    as a member of the class

    int prevLF = mpScrDc->GetLogicalFunction();

    mpScrDc->SetLogicalFunction( wxXOR );

    wxBitmap checker( (const char*)_gCheckerImg, 8,8 );

    wxBrush checkerBrush( checker );

    mpScrDc->SetPen( *wxTRANSPARENT_PEN );
    mpScrDc->SetBrush( checkerBrush );

    int half = mHintBorder / 2;

    mpScrDc->DrawRectangle( r.x - half, r.y - half,
                            r.width + 2*half, mHintBorder );

    mpScrDc->DrawRectangle( r.x - half, r.y + r.height - half,
                            r.width + 2*half, mHintBorder );

    mpScrDc->DrawRectangle( r.x - half, r.y + half - 1,
                            mHintBorder, r.height - 2*half + 2);

    mpScrDc->DrawRectangle( r.x + r.width - half,
                            r.y + half - 1,
                            mHintBorder, r.height - 2*half + 2);

    mpScrDc->SetBrush( wxNullBrush );

    mpScrDc->SetLogicalFunction( prevLF );
}

void wxToolWindow::SetHintCursor( int type )
{
    if ( mResizeStarted )
        return;

    if ( type == HITS_WND_NOTHING || type == HITS_WND_CLIENT )
    {
        // the cursor is out of window - reset to arrow

        if ( mMouseCaptured )
        {
            ReleaseMouse();
            mMouseCaptured = false;
        }

        SetCursor( wxCURSOR_ARROW );

        mCursorType = type;

        return;
    }

    // did the cursor actually changed?

    if ( type != mCursorType )
    {
        mCursorType = type;

        switch ( type )
        {
            case HITS_WND_LEFT_EDGE   : SetCursor( wxCURSOR_SIZEWE ); break;
            case HITS_WND_RIGHT_EDGE  : SetCursor( wxCURSOR_SIZEWE ); break;
            case HITS_WND_TOP_EDGE    : SetCursor( wxCURSOR_SIZENS ); break;
            case HITS_WND_BOTTOM_EDGE : SetCursor( wxCURSOR_SIZENS ); break;

            case HITS_WND_TOP_LEFT_CORNER     : SetCursor( wxCURSOR_SIZENWSE ); break;
            case HITS_WND_BOTTOM_RIGHT_CORNER : SetCursor( wxCURSOR_SIZENWSE ); break;
            case HITS_WND_TOP_RIGHT_CORNER    : SetCursor( wxCURSOR_SIZENESW ); break;
            case HITS_WND_BOTTOM_LEFT_CORNER  : SetCursor( wxCURSOR_SIZENESW ); break;

            case HITS_WND_TITLE  : SetCursor( wxCURSOR_ARROW ); break;
            case HITS_WND_CLIENT : SetCursor( wxCURSOR_ARROW ); break;

            default: break;
        }

        if (mMouseCaptured)
        {
            mMouseCaptured = false;
            ReleaseMouse();
        }
    }

    if ( !mMouseCaptured )
    {
        mMouseCaptured = true;
        CaptureMouse();
    }
}

#define FL_INFINITY 32768

static inline void clip_to( int& value, long from, long till )
{
    if ( value < from )
        value = from;

    if ( value > till )
        value = till;
}

void wxToolWindow::AdjustRectPos( const wxRect& original, const wxSize& newDim, wxRect& newRect )
{
    if ( mCursorType == HITS_WND_TOP_EDGE ||
         mCursorType == HITS_WND_TOP_LEFT_CORNER )
    {
        newRect.x = original.x + original.width  - newDim.x;
        newRect.y = original.y + original.height - newDim.y;
    }
    else
    if ( mCursorType == HITS_WND_LEFT_EDGE ||
         mCursorType == HITS_WND_BOTTOM_LEFT_CORNER )
    {
        newRect.x = original.x + original.width  - newDim.x;
        newRect.y = original.y;
    }
    else
    if ( mCursorType == HITS_WND_RIGHT_EDGE ||
         mCursorType == HITS_WND_TOP_RIGHT_CORNER )
    {
        newRect.x = original.x;
        newRect.y = original.y + original.height - newDim.y;
    }
    else
    if ( mCursorType == HITS_WND_BOTTOM_EDGE ||
         mCursorType == HITS_WND_BOTTOM_RIGHT_CORNER )
    {
        newRect.x = original.x;
        newRect.y = original.y;
    }

    newRect.width  = newDim.x;
    newRect.height = newDim.y;
}

void wxToolWindow::CalcResizedRect( wxRect& rect, wxPoint& delta, const wxSize& minDim )
{
    // Microsoft's rect-coordinates are best suited
    // for the case of corner-clipping

    int left   = mInitialRect.x;
    int top    = mInitialRect.y;
    int right  = mInitialRect.x + mInitialRect.width;
    int bottom = mInitialRect.y + mInitialRect.height;

    // constraint delta edge is dragged

    switch ( mCursorType )
    {
        case HITS_WND_LEFT_EDGE   : delta.y = 0; break;
        case HITS_WND_RIGHT_EDGE  : delta.y = 0; break;
        case HITS_WND_TOP_EDGE    : delta.x = 0; break;
        case HITS_WND_BOTTOM_EDGE : delta.x = 0; break;
        default: break;
    }

    if ( mCursorType == HITS_WND_TOP_EDGE ||
         mCursorType == HITS_WND_TOP_LEFT_CORNER )
    {
        left += delta.x;
        top  += delta.y;

        clip_to( left, -FL_INFINITY, mInitialRect.x + mInitialRect.width  - minDim.x  );
        clip_to( top,  -FL_INFINITY, mInitialRect.y + mInitialRect.height - minDim.y );
    }
    else
    if ( mCursorType == HITS_WND_LEFT_EDGE ||
         mCursorType == HITS_WND_BOTTOM_LEFT_CORNER )
    {
        left   += delta.x;
        bottom += delta.y;

        clip_to( left,    -FL_INFINITY, mInitialRect.x + mInitialRect.width  - minDim.x  );
        clip_to( bottom,  mInitialRect.y + minDim.y, FL_INFINITY );
    }
    else
    if ( mCursorType == HITS_WND_RIGHT_EDGE ||
        mCursorType == HITS_WND_TOP_RIGHT_CORNER )
    {
        right += delta.x;
        top   += delta.y;

        clip_to( right, mInitialRect.x + minDim.x, FL_INFINITY );
        clip_to( top,   -FL_INFINITY, mInitialRect.y + mInitialRect.height - minDim.y );
    }
    else
    if ( mCursorType == HITS_WND_BOTTOM_EDGE ||
         mCursorType == HITS_WND_BOTTOM_RIGHT_CORNER )
    {
        right  += delta.x;
        bottom += delta.y;

        clip_to( right,  mInitialRect.x + minDim.x,  FL_INFINITY );
        clip_to( bottom, mInitialRect.y + minDim.y, FL_INFINITY );
    }
    else
    {
        wxFAIL_MSG( _T("what did the cursor hit?") );
    }

    rect.x = left;
    rect.y = top;
    rect.width  = right - left;
    rect.height = bottom - top;
}

wxSize wxToolWindow::GetMinimalWndDim()
{
    return wxSize( (mWndHorizGap + mClntHorizGap)*2 + BTN_BOX_WIDTH*4,
                   (mWndVertGap  + mClntVertGap )*2 + mTitleHeight );
}

void wxToolWindow::OnMotion( wxMouseEvent& event )
{
    if ( !mResizeStarted )
    {
        for( size_t i = 0; i != mButtons.Count(); ++i )
            mButtons[i]->OnMotion( wxPoint( event.m_x, event.m_y ) );

        SetHintCursor( HitTestWindow( event ) );
        return;
    }

    wxPoint pos;
    GetScrMousePos( event, pos );

    if ( mCursorType == HITS_WND_TITLE )
    {
        int w,h;
        GetSize( &w, &h );

        SetSize( mInitialRect.x + pos.x - mDragOrigin.x,
                 mInitialRect.y + pos.y - mDragOrigin.y,
                 w,h, 0 );
    }

    else
    {
        wxPoint delta( pos.x - mDragOrigin.x, pos.y - mDragOrigin.y );

        wxRect newRect;

        wxSize minDim = GetMinimalWndDim();

        CalcResizedRect( newRect, delta, minDim );

        wxSize borderDim( ( mWndHorizGap + mClntHorizGap )*2,
                          ( mWndVertGap  + mClntVertGap  )*2 + mTitleHeight );