basic.cpp

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

/////////////////////////////////////////////////////////////////////////////
// Name:        basic.cpp
// Purpose:     Basic OGL classes
// Author:      Julian Smart
// Modified by:
// Created:     12/07/98
// RCS-ID:      $Id: basic.cpp,v 1.29 2006/04/18 22:26:26 PC Exp $
// Copyright:   (c) Julian Smart
// 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

#if wxUSE_PROLOGIO
#include "wx/deprecated/wxexpr.h"
#endif

#ifdef new
#undef new
#endif

#include <stdio.h>
#include <ctype.h>

#include "wx/ogl/ogl.h"


// Control point types
// Rectangle and most other shapes
#define CONTROL_POINT_VERTICAL   1
#define CONTROL_POINT_HORIZONTAL 2
#define CONTROL_POINT_DIAGONAL   3

// Line
#define CONTROL_POINT_ENDPOINT_TO 4
#define CONTROL_POINT_ENDPOINT_FROM 5
#define CONTROL_POINT_LINE       6

IMPLEMENT_DYNAMIC_CLASS(wxShapeTextLine, wxObject)
IMPLEMENT_DYNAMIC_CLASS(wxAttachmentPoint, wxObject)

wxShapeTextLine::wxShapeTextLine(double the_x, double the_y, const wxString& the_line)
{
  m_x = the_x; m_y = the_y; m_line = the_line;
}

wxShapeTextLine::~wxShapeTextLine()
{
}

IMPLEMENT_ABSTRACT_CLASS(wxShapeEvtHandler, wxObject)

wxShapeEvtHandler::wxShapeEvtHandler(wxShapeEvtHandler *prev, wxShape *shape)
{
  m_previousHandler = prev;
  m_handlerShape = shape;
}

wxShapeEvtHandler::~wxShapeEvtHandler()
{
}

// Creates a copy of this event handler.
wxShapeEvtHandler* wxShapeEvtHandler::CreateNewCopy()
{
  wxShapeEvtHandler* newObject = (wxShapeEvtHandler*) GetClassInfo()->CreateObject();

  wxASSERT( (newObject != NULL) );
  wxASSERT( (newObject->IsKindOf(CLASSINFO(wxShapeEvtHandler))) );

  newObject->m_previousHandler = newObject;

  CopyData(*newObject);

  return newObject;
}


void wxShapeEvtHandler::OnDelete()
{
  if (this != GetShape())
    delete this;
}

void wxShapeEvtHandler::OnDraw(wxDC& dc)
{
  if (m_previousHandler)
    m_previousHandler->OnDraw(dc);
}

void wxShapeEvtHandler::OnMoveLinks(wxDC& dc)
{
  if (m_previousHandler)
    m_previousHandler->OnMoveLinks(dc);
}

void wxShapeEvtHandler::OnMoveLink(wxDC& dc, bool moveControlPoints)
{
  if (m_previousHandler)
    m_previousHandler->OnMoveLink(dc, moveControlPoints);
}

void wxShapeEvtHandler::OnDrawContents(wxDC& dc)
{
  if (m_previousHandler)
    m_previousHandler->OnDrawContents(dc);
}

void wxShapeEvtHandler::OnDrawBranches(wxDC& dc, bool erase)
{
  if (m_previousHandler)
    m_previousHandler->OnDrawBranches(dc, erase);
}

void wxShapeEvtHandler::OnSize(double x, double y)
{
  if (m_previousHandler)
    m_previousHandler->OnSize(x, y);
}

bool wxShapeEvtHandler::OnMovePre(wxDC& dc, double x, double y, double old_x, double old_y, bool display)
{
  if (m_previousHandler)
    return m_previousHandler->OnMovePre(dc, x, y, old_x, old_y, display);
  else
    return true;
}

void wxShapeEvtHandler::OnMovePost(wxDC& dc, double x, double y, double old_x, double old_y, bool display)
{
  if (m_previousHandler)
    m_previousHandler->OnMovePost(dc, x, y, old_x, old_y, display);
}

void wxShapeEvtHandler::OnErase(wxDC& dc)
{
  if (m_previousHandler)
    m_previousHandler->OnErase(dc);
}

void wxShapeEvtHandler::OnEraseContents(wxDC& dc)
{
  if (m_previousHandler)
    m_previousHandler->OnEraseContents(dc);
}

void wxShapeEvtHandler::OnHighlight(wxDC& dc)
{
  if (m_previousHandler)
    m_previousHandler->OnHighlight(dc);
}

void wxShapeEvtHandler::OnLeftClick(double x, double y, int keys, int attachment)
{
  if (m_previousHandler)
    m_previousHandler->OnLeftClick(x, y, keys, attachment);
}

void wxShapeEvtHandler::OnLeftDoubleClick(double x, double y, int keys, int attachment)
{
  if (m_previousHandler)
    m_previousHandler->OnLeftDoubleClick(x, y, keys, attachment);
}

void wxShapeEvtHandler::OnRightClick(double x, double y, int keys, int attachment)
{
  if (m_previousHandler)
    m_previousHandler->OnRightClick(x, y, keys, attachment);
}

void wxShapeEvtHandler::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
{
  if (m_previousHandler)
    m_previousHandler->OnDragLeft(draw, x, y, keys, attachment);
}

void wxShapeEvtHandler::OnBeginDragLeft(double x, double y, int keys, int attachment)
{
  if (m_previousHandler)
    m_previousHandler->OnBeginDragLeft(x, y, keys, attachment);
}

void wxShapeEvtHandler::OnEndDragLeft(double x, double y, int keys, int attachment)
{
  if (m_previousHandler)
    m_previousHandler->OnEndDragLeft(x, y, keys, attachment);
}

void wxShapeEvtHandler::OnDragRight(bool draw, double x, double y, int keys, int attachment)
{
  if (m_previousHandler)
    m_previousHandler->OnDragRight(draw, x, y, keys, attachment);
}

void wxShapeEvtHandler::OnBeginDragRight(double x, double y, int keys, int attachment)
{
  if (m_previousHandler)
    m_previousHandler->OnBeginDragRight(x, y, keys, attachment);
}

void wxShapeEvtHandler::OnEndDragRight(double x, double y, int keys, int attachment)
{
  if (m_previousHandler)
    m_previousHandler->OnEndDragRight(x, y, keys, attachment);
}

// Control points ('handles') redirect control to the actual shape, to make it easier
// to override sizing behaviour.
void wxShapeEvtHandler::OnSizingDragLeft(wxControlPoint* pt, bool draw, double x, double y, int keys, int attachment)
{
  if (m_previousHandler)
    m_previousHandler->OnSizingDragLeft(pt, draw, x, y, keys, attachment);
}

void wxShapeEvtHandler::OnSizingBeginDragLeft(wxControlPoint* pt, double x, double y, int keys, int attachment)
{
  if (m_previousHandler)
    m_previousHandler->OnSizingBeginDragLeft(pt, x, y, keys, attachment);
}

void wxShapeEvtHandler::OnSizingEndDragLeft(wxControlPoint* pt, double x, double y, int keys, int attachment)
{
  if (m_previousHandler)
    m_previousHandler->OnSizingEndDragLeft(pt, x, y, keys, attachment);
}

void wxShapeEvtHandler::OnDrawOutline(wxDC& dc, double x, double y, double w, double h)
{
  if (m_previousHandler)
    m_previousHandler->OnDrawOutline(dc, x, y, w, h);
}

void wxShapeEvtHandler::OnDrawControlPoints(wxDC& dc)
{
  if (m_previousHandler)
    m_previousHandler->OnDrawControlPoints(dc);
}

void wxShapeEvtHandler::OnEraseControlPoints(wxDC& dc)
{
  if (m_previousHandler)
    m_previousHandler->OnEraseControlPoints(dc);
}

// Can override this to prevent or intercept line reordering.
void wxShapeEvtHandler::OnChangeAttachment(int attachment, wxLineShape* line, wxList& ordering)
{
  if (m_previousHandler)
    m_previousHandler->OnChangeAttachment(attachment, line, ordering);
}

IMPLEMENT_ABSTRACT_CLASS(wxShape, wxShapeEvtHandler)

wxShape::wxShape(wxShapeCanvas *can)
{
  m_eventHandler = this;
  SetShape(this);
  m_id = 0;
  m_formatted = false;
  m_canvas = can;
  m_xpos = 0.0; m_ypos = 0.0;
  m_pen = g_oglBlackPen;
  m_brush = wxWHITE_BRUSH;
  m_font = g_oglNormalFont;
  m_textColour = wxT("BLACK");
  m_textColourName = wxT("BLACK");
  m_visible = false;
  m_selected = false;
  m_attachmentMode = ATTACHMENT_MODE_NONE;
  m_spaceAttachments = true;
  m_disableLabel = false;
  m_fixedWidth = false;
  m_fixedHeight = false;
  m_drawHandles = true;
  m_sensitivity = OP_ALL;
  m_draggable = true;
  m_parent = NULL;
  m_formatMode = FORMAT_CENTRE_HORIZ | FORMAT_CENTRE_VERT;
  m_shadowMode = SHADOW_NONE;
  m_shadowOffsetX = 6;
  m_shadowOffsetY = 6;
  m_shadowBrush = wxBLACK_BRUSH;
  m_textMarginX = 5;
  m_textMarginY = 5;
  m_regionName = wxT("0");
  m_centreResize = true;
  m_maintainAspectRatio = false;
  m_highlighted = false;
  m_rotation = 0.0;
  m_branchNeckLength = 10;
  m_branchStemLength = 10;
  m_branchSpacing = 10;
  m_branchStyle = BRANCHING_ATTACHMENT_NORMAL;

  // Set up a default region. Much of the above will be put into
  // the region eventually (the duplication is for compatibility)
  wxShapeRegion *region = new wxShapeRegion;
  m_regions.Append(region);
  region->SetName(wxT("0"));
  region->SetFont(g_oglNormalFont);
  region->SetFormatMode(FORMAT_CENTRE_HORIZ | FORMAT_CENTRE_VERT);
  region->SetColour(wxT("BLACK"));
}

wxShape::~wxShape()
{
  if (m_parent)
    m_parent->GetChildren().DeleteObject(this);

  ClearText();
  ClearRegions();
  ClearAttachments();

  if (m_canvas)
    m_canvas->RemoveShape(this);

  GetEventHandler()->OnDelete();
}

void wxShape::SetHighlight(bool hi, bool recurse)
{
  m_highlighted = hi;
  if (recurse)
  {
    wxNode *node = m_children.GetFirst();
    while (node)
    {
      wxShape *child = (wxShape *)node->GetData();
      child->SetHighlight(hi, recurse);
      node = node->GetNext();
    }
  }
}

void wxShape::SetSensitivityFilter(int sens, bool recursive)
{
  if (sens & OP_DRAG_LEFT)
    m_draggable = true;
  else
    m_draggable = false;

  m_sensitivity = sens;
  if (recursive)
  {
    wxNode *node = m_children.GetFirst();
    while (node)
    {
      wxShape *obj = (wxShape *)node->GetData();
      obj->SetSensitivityFilter(sens, true);
      node = node->GetNext();
    }
  }
}

void wxShape::SetDraggable(bool drag, bool recursive)
{
  m_draggable = drag;
  if (m_draggable)
    m_sensitivity |= OP_DRAG_LEFT;
  else
    if (m_sensitivity & OP_DRAG_LEFT)
      m_sensitivity = m_sensitivity - OP_DRAG_LEFT;

  if (recursive)
  {
    wxNode *node = m_children.GetFirst();
    while (node)
    {
      wxShape *obj = (wxShape *)node->GetData();
      obj->SetDraggable(drag, true);
      node = node->GetNext();
    }
  }
}

void wxShape::SetDrawHandles(bool drawH)
{
  m_drawHandles = drawH;
  wxNode *node = m_children.GetFirst();
  while (node)
  {
    wxShape *obj = (wxShape *)node->GetData();
    obj->SetDrawHandles(drawH);
    node = node->GetNext();
  }
}

void wxShape::SetShadowMode(int mode, bool redraw)
{
  if (redraw && GetCanvas())
  {
    wxClientDC dc(GetCanvas());
    GetCanvas()->PrepareDC(dc);
    Erase(dc);

    m_shadowMode = mode;

    Draw(dc);
  }
  else
  {
    m_shadowMode = mode;
  }
}

void wxShape::SetCanvas(wxShapeCanvas *theCanvas)
{
  m_canvas = theCanvas;
  wxNode *node = m_children.GetFirst();
  while (node)
  {
    wxShape *child = (wxShape *)node->GetData();
    child->SetCanvas(theCanvas);
    node = node->GetNext();
  }
}

void wxShape::AddToCanvas(wxShapeCanvas *theCanvas, wxShape *addAfter)
{
  theCanvas->AddShape(this, addAfter);
  wxNode *node = m_children.GetFirst();
  wxShape *lastImage = this;
  while (node)
  {
    wxShape *object = (wxShape *)node->GetData();
    object->AddToCanvas(theCanvas, lastImage);
    lastImage = object;

    node = node->GetNext();
  }
}

// Insert at front of canvas
void wxShape::InsertInCanvas(wxShapeCanvas *theCanvas)
{
  theCanvas->InsertShape(this);
  wxNode *node = m_children.GetFirst();
  wxShape *lastImage = this;
  while (node)
  {
    wxShape *object = (wxShape *)node->GetData();
    object->AddToCanvas(theCanvas, lastImage);
    lastImage = object;

    node = node->GetNext();
  }
}

void wxShape::RemoveFromCanvas(wxShapeCanvas *theCanvas)
{
  if (Selected())
    Select(false);
  theCanvas->RemoveShape(this);
  wxNode *node = m_children.GetFirst();
  while (node)
  {
    wxShape *object = (wxShape *)node->GetData();
    object->RemoveFromCanvas(theCanvas);

    node = node->GetNext();
  }
}

void wxShape::ClearAttachments()
{
  wxNode *node = m_attachmentPoints.GetFirst();
  while (node)
  {
    wxAttachmentPoint *point = (wxAttachmentPoint *)node->GetData();
    delete point;
    node = node->GetNext();
  }
  m_attachmentPoints.Clear();
}