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lines.cpp
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/////////////////////////////////////////////////////////////////////////////
// Name: lines.cpp
// Purpose: wxLineShape
// Author: Julian Smart
// Modified by:
// Created: 12/07/98
// RCS-ID: $Id: lines.cpp,v 1.1 2007/03/28 15:15:57 frm 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 <ctype.h>
#include "ogl.h"
// Line shape
IMPLEMENT_DYNAMIC_CLASS(wxLineShape, wxShape)
wxLineShape::wxLineShape()
{
m_sensitivity = OP_CLICK_LEFT | OP_CLICK_RIGHT;
m_draggable = false;
m_attachmentTo = 0;
m_attachmentFrom = 0;
/*
m_actualTextWidth = 0.0;
m_actualTextHeight = 0.0;
*/
m_from = NULL;
m_to = NULL;
m_erasing = false;
m_arrowSpacing = 5.0; // For the moment, don't bother saving this to file.
m_ignoreArrowOffsets = false;
m_isSpline = false;
m_maintainStraightLines = false;
m_alignmentStart = 0;
m_alignmentEnd = 0;
m_lineControlPoints = NULL;
// Clear any existing regions (created in an earlier constructor)
// and make the three line regions.
ClearRegions();
wxShapeRegion *newRegion = new wxShapeRegion;
newRegion->SetName("Middle");
newRegion->SetSize(150, 50);
m_regions.Append((wxObject *)newRegion);
newRegion = new wxShapeRegion;
newRegion->SetName("Start");
newRegion->SetSize(150, 50);
m_regions.Append((wxObject *)newRegion);
newRegion = new wxShapeRegion;
newRegion->SetName("End");
newRegion->SetSize(150, 50);
m_regions.Append((wxObject *)newRegion);
for (int i = 0; i < 3; i++)
m_labelObjects[i] = NULL;
}
wxLineShape::~wxLineShape()
{
if (m_lineControlPoints)
{
ClearPointList(*m_lineControlPoints);
delete m_lineControlPoints;
}
for (int i = 0; i < 3; i++)
{
if (m_labelObjects[i])
{
m_labelObjects[i]->Select(false);
m_labelObjects[i]->RemoveFromCanvas(m_canvas);
delete m_labelObjects[i];
m_labelObjects[i] = NULL;
}
}
ClearArrowsAtPosition(-1);
}
void wxLineShape::MakeLineControlPoints(int n)
{
if (m_lineControlPoints)
{
ClearPointList(*m_lineControlPoints);
delete m_lineControlPoints;
}
m_lineControlPoints = new wxList;
for (int i = 0; i < n; i++)
{
wxRealPoint *point = new wxRealPoint(-999, -999);
m_lineControlPoints->Append((wxObject*) point);
}
}
wxNode *wxLineShape::InsertLineControlPoint(wxDC* dc)
{
if (dc)
Erase(*dc);
wxNode *last = m_lineControlPoints->GetLast();
wxNode *second_last = last->GetPrevious();
wxRealPoint *last_point = (wxRealPoint *)last->GetData();
wxRealPoint *second_last_point = (wxRealPoint *)second_last->GetData();
// Choose a point half way between the last and penultimate points
double line_x = ((last_point->x + second_last_point->x)/2);
double line_y = ((last_point->y + second_last_point->y)/2);
wxRealPoint *point = new wxRealPoint(line_x, line_y);
wxNode *node = m_lineControlPoints->Insert(last, (wxObject*) point);
return node;
}
bool wxLineShape::DeleteLineControlPoint()
{
if (m_lineControlPoints->GetCount() < 3)
return false;
wxNode *last = m_lineControlPoints->GetLast();
wxNode *second_last = last->GetPrevious();
wxRealPoint *second_last_point = (wxRealPoint *)second_last->GetData();
delete second_last_point;
delete second_last;
return true;
}
void wxLineShape::Initialise()
{
if (m_lineControlPoints)
{
// Just move the first and last control points
wxNode *first = m_lineControlPoints->GetFirst();
wxRealPoint *first_point = (wxRealPoint *)first->GetData();
wxNode *last = m_lineControlPoints->GetLast();
wxRealPoint *last_point = (wxRealPoint *)last->GetData();
// If any of the line points are at -999, we must
// initialize them by placing them half way between the first
// and the last.
wxNode *node = first->GetNext();
while (node)
{
wxRealPoint *point = (wxRealPoint *)node->GetData();
if (point->x == -999)
{
double x1, y1, x2, y2;
if (first_point->x < last_point->x)
{ x1 = first_point->x; x2 = last_point->x; }
else
{ x2 = first_point->x; x1 = last_point->x; }
if (first_point->y < last_point->y)
{ y1 = first_point->y; y2 = last_point->y; }
else
{ y2 = first_point->y; y1 = last_point->y; }
point->x = ((x2 - x1)/2 + x1);
point->y = ((y2 - y1)/2 + y1);
}
node = node->GetNext();
}
}
}
// Format a text string according to the region size, adding
// strings with positions to region text list
void wxLineShape::FormatText(wxDC& dc, const wxString& s, int i)
{
double w, h;
ClearText(i);
if (m_regions.GetCount() < 1)
return;
wxNode *node = m_regions.Item(i);
if (!node)
return;
wxShapeRegion *region = (wxShapeRegion *)node->GetData();
region->SetText(s);
dc.SetFont(* region->GetFont());
region->GetSize(&w, &h);
// Initialize the size if zero
if (((w == 0) || (h == 0)) && (s.Length() > 0))
{
w = 100; h = 50;
region->SetSize(w, h);
}
wxStringList *string_list = oglFormatText(dc, s, (w-5), (h-5), region->GetFormatMode());
node = (wxNode*)string_list->GetFirst();
while (node)
{
wxChar *s = (wxChar *)node->GetData();
wxShapeTextLine *line = new wxShapeTextLine(0.0, 0.0, s);
region->GetFormattedText().Append((wxObject *)line);
node = node->GetNext();
}
delete string_list;
double actualW = w;
double actualH = h;
if (region->GetFormatMode() & FORMAT_SIZE_TO_CONTENTS)
{
oglGetCentredTextExtent(dc, &(region->GetFormattedText()), m_xpos, m_ypos, w, h, &actualW, &actualH);
if ((actualW != w ) || (actualH != h))
{
double xx, yy;
GetLabelPosition(i, &xx, &yy);
EraseRegion(dc, region, xx, yy);
if (m_labelObjects[i])
{
m_labelObjects[i]->Select(false, &dc);
m_labelObjects[i]->Erase(dc);
m_labelObjects[i]->SetSize(actualW, actualH);
}
region->SetSize(actualW, actualH);
if (m_labelObjects[i])
{
m_labelObjects[i]->Select(true, & dc);
m_labelObjects[i]->Draw(dc);
}
}
}
oglCentreText(dc, &(region->GetFormattedText()), m_xpos, m_ypos, actualW, actualH, region->GetFormatMode());
m_formatted = true;
}
void wxLineShape::DrawRegion(wxDC& dc, wxShapeRegion *region, double x, double y)
{
if (GetDisableLabel())
return;
double w, h;
double xx, yy;
region->GetSize(&w, &h);
// Get offset from x, y
region->GetPosition(&xx, &yy);
double xp = xx + x;
double yp = yy + y;
// First, clear a rectangle for the text IF there is any
if (region->GetFormattedText().GetCount() > 0)
{
dc.SetPen(GetBackgroundPen());
dc.SetBrush(GetBackgroundBrush());
// Now draw the text
if (region->GetFont()) dc.SetFont(* region->GetFont());
dc.DrawRectangle((long)(xp - w/2.0), (long)(yp - h/2.0), (long)w, (long)h);
if (m_pen) dc.SetPen(* m_pen);
dc.SetTextForeground(region->GetActualColourObject());
#ifdef __WXMSW__
dc.SetTextBackground(GetBackgroundBrush().GetColour());
#endif
oglDrawFormattedText(dc, &(region->GetFormattedText()), xp, yp, w, h, region->GetFormatMode());
}
}
void wxLineShape::EraseRegion(wxDC& dc, wxShapeRegion *region, double x, double y)
{
if (GetDisableLabel())
return;
double w, h;
double xx, yy;
region->GetSize(&w, &h);
// Get offset from x, y
region->GetPosition(&xx, &yy);
double xp = xx + x;
double yp = yy + y;
if (region->GetFormattedText().GetCount() > 0)
{
dc.SetPen(GetBackgroundPen());
dc.SetBrush(GetBackgroundBrush());
dc.DrawRectangle((long)(xp - w/2.0), (long)(yp - h/2.0), (long)w, (long)h);
}
}
// Get the reference point for a label. Region x and y
// are offsets from this.
// position is 0, 1, 2
void wxLineShape::GetLabelPosition(int position, double *x, double *y)
{
switch (position)
{
case 0:
{
// Want to take the middle section for the label
int n = m_lineControlPoints->GetCount();
int half_way = (int)(n/2);
// Find middle of this line
wxNode *node = m_lineControlPoints->Item(half_way - 1);
wxRealPoint *point = (wxRealPoint *)node->GetData();
wxNode *next_node = node->GetNext();
wxRealPoint *next_point = (wxRealPoint *)next_node->GetData();
double dx = (next_point->x - point->x);
double dy = (next_point->y - point->y);
*x = (double)(point->x + dx/2.0);
*y = (double)(point->y + dy/2.0);
break;
}
case 1:
{
wxNode *node = m_lineControlPoints->GetFirst();
*x = ((wxRealPoint *)node->GetData())->x;
*y = ((wxRealPoint *)node->GetData())->y;
break;
}
case 2:
{
wxNode *node = m_lineControlPoints->GetLast();
*x = ((wxRealPoint *)node->GetData())->x;
*y = ((wxRealPoint *)node->GetData())->y;
break;
}
default:
break;
}
}
/*
* Find whether line is supposed to be vertical or horizontal and
* make it so.
*
*/
void GraphicsStraightenLine(wxRealPoint *point1, wxRealPoint *point2)
{
double dx = point2->x - point1->x;
double dy = point2->y - point1->y;
if (dx == 0.0)
return;
else if (fabs(dy/dx) > 1.0)
{
point2->x = point1->x;
}
else point2->y = point1->y;
}
void wxLineShape::Straighten(wxDC *dc)
{
if (!m_lineControlPoints || m_lineControlPoints->GetCount() < 3)
return;
if (dc)
Erase(* dc);
wxNode *first_point_node = m_lineControlPoints->GetFirst();
wxNode *last_point_node = m_lineControlPoints->GetLast();
wxNode *second_last_point_node = last_point_node->GetPrevious();
wxRealPoint *last_point = (wxRealPoint *)last_point_node->GetData();
wxRealPoint *second_last_point = (wxRealPoint *)second_last_point_node->GetData();
GraphicsStraightenLine(last_point, second_last_point);
wxNode *node = first_point_node;
while (node && (node != second_last_point_node))
{
wxRealPoint *point = (wxRealPoint *)node->GetData();
wxRealPoint *next_point = (wxRealPoint *)(node->GetNext()->GetData());
GraphicsStraightenLine(point, next_point);
node = node->GetNext();
}
if (dc)
Draw(* dc);
}
void wxLineShape::Unlink()
{
if (m_to)
m_to->GetLines().DeleteObject(this);
if (m_from)
m_from->GetLines().DeleteObject(this);
m_to = NULL;
m_from = NULL;
}
void wxLineShape::SetEnds(double x1, double y1, double x2, double y2)
{
// Find centre point
wxNode *first_point_node = m_lineControlPoints->GetFirst();
wxNode *last_point_node = m_lineControlPoints->GetLast();
wxRealPoint *first_point = (wxRealPoint *)first_point_node->GetData();
wxRealPoint *last_point = (wxRealPoint *)last_point_node->GetData();
first_point->x = x1;
first_point->y = y1;
last_point->x = x2;
last_point->y = y2;
m_xpos = (double)((x1 + x2)/2.0);
m_ypos = (double)((y1 + y2)/2.0);
}
// Get absolute positions of ends
void wxLineShape::GetEnds(double *x1, double *y1, double *x2, double *y2)
{
wxNode *first_point_node = m_lineControlPoints->GetFirst();
wxNode *last_point_node = m_lineControlPoints->GetLast();
wxRealPoint *first_point = (wxRealPoint *)first_point_node->GetData();
wxRealPoint *last_point = (wxRealPoint *)last_point_node->GetData();
*x1 = first_point->x; *y1 = first_point->y;
*x2 = last_point->x; *y2 = last_point->y;
}
void wxLineShape::SetAttachments(int from_attach, int to_attach)
{
m_attachmentFrom = from_attach;
m_attachmentTo = to_attach;
}
bool wxLineShape::HitTest(double x, double y, int *attachment, double *distance)
{
if (!m_lineControlPoints)
return false;
// Look at label regions in case mouse is over a label
bool inLabelRegion = false;
for (int i = 0; i < 3; i ++)
{
wxNode *regionNode = m_regions.Item(i);
if (regionNode)
{
wxShapeRegion *region = (wxShapeRegion *)regionNode->GetData();
if (region->m_formattedText.GetCount() > 0)
{
double xp, yp, cx, cy, cw, ch;
GetLabelPosition(i, &xp, &yp);
// Offset region from default label position
region->GetPosition(&cx, &cy);
region->GetSize(&cw, &ch);
cx += xp;
cy += yp;
double rLeft = (double)(cx - (cw/2.0));
double rTop = (double)(cy - (ch/2.0));
double rRight = (double)(cx + (cw/2.0));
double rBottom = (double)(cy + (ch/2.0));
if (x > rLeft && x < rRight && y > rTop && y < rBottom)
{
inLabelRegion = true;
i = 3;
}
}
}
}
wxNode *node = m_lineControlPoints->GetFirst();
while (node && node->GetNext())
{
wxRealPoint *point1 = (wxRealPoint *)node->GetData();
wxRealPoint *point2 = (wxRealPoint *)node->GetNext()->GetData();
// For inaccurate mousing allow 8 pixel corridor
int extra = 4;
double dx = point2->x - point1->x;
double dy = point2->y - point1->y;
double seg_len = sqrt(dx*dx+dy*dy);
double distance_from_seg =
seg_len*((x-point1->x)*dy-(y-point1->y)*dx)/(dy*dy+dx*dx);
double distance_from_prev =
seg_len*((y-point1->y)*dy+(x-point1->x)*dx)/(dy*dy+dx*dx);
if ((fabs(distance_from_seg) < extra &&
distance_from_prev >= 0 && distance_from_prev <= seg_len)
|| inLabelRegion)
{
*attachment = 0;
*distance = distance_from_seg;
return true;
}
node = node->GetNext();
}
return false;
}
void wxLineShape::DrawArrows(wxDC& dc)
{
// Distance along line of each arrow: space them out evenly.
double startArrowPos = 0.0;
double endArrowPos = 0.0;
double middleArrowPos = 0.0;
wxNode *node = m_arcArrows.GetFirst();
while (node)
{
wxArrowHead *arrow = (wxArrowHead *)node->GetData();
switch (arrow->GetArrowEnd())
{
case ARROW_POSITION_START:
{
if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
// If specified, x offset is proportional to line length
DrawArrow(dc, arrow, arrow->GetXOffset(), true);
else
{
DrawArrow(dc, arrow, startArrowPos, false); // Absolute distance
startArrowPos += arrow->GetSize() + arrow->GetSpacing();
}
break;
}
case ARROW_POSITION_END:
{
if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
DrawArrow(dc, arrow, arrow->GetXOffset(), true);
else
{
DrawArrow(dc, arrow, endArrowPos, false);
endArrowPos += arrow->GetSize() + arrow->GetSpacing();
}
break;
}
case ARROW_POSITION_MIDDLE:
{
arrow->SetXOffset(middleArrowPos);
if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
DrawArrow(dc, arrow, arrow->GetXOffset(), true);
else
{
DrawArrow(dc, arrow, middleArrowPos, false);
middleArrowPos += arrow->GetSize() + arrow->GetSpacing();
}
break;
}
}
node = node->GetNext();
}
}
void wxLineShape::DrawArrow(wxDC& dc, wxArrowHead *arrow, double xOffset, bool proportionalOffset)
{
wxNode *first_line_node = m_lineControlPoints->GetFirst();
wxRealPoint *first_line_point = (wxRealPoint *)first_line_node->GetData();
wxNode *second_line_node = first_line_node->GetNext();
wxRealPoint *second_line_point = (wxRealPoint *)second_line_node->GetData();
wxNode *last_line_node = m_lineControlPoints->GetLast();
wxRealPoint *last_line_point = (wxRealPoint *)last_line_node->GetData();
wxNode *second_last_line_node = last_line_node->GetPrevious();
wxRealPoint *second_last_line_point = (wxRealPoint *)second_last_line_node->GetData();
// Position where we want to start drawing
double positionOnLineX = 0.0, positionOnLineY = 0.0;
// Position of start point of line, at the end of which we draw the arrow.
double startPositionX = 0.0 , startPositionY = 0.0;
switch (arrow->GetPosition())
{
case ARROW_POSITION_START:
{
// If we're using a proportional offset, calculate just where this will
// be on the line.
double realOffset = xOffset;
if (proportionalOffset)
{
double totalLength =
(double)sqrt((second_line_point->x - first_line_point->x)*(second_line_point->x - first_line_point->x) +
(second_line_point->y - first_line_point->y)*(second_line_point->y - first_line_point->y));
realOffset = (double)(xOffset * totalLength);
}
GetPointOnLine(second_line_point->x, second_line_point->y,
first_line_point->x, first_line_point->y,
realOffset, &positionOnLineX, &positionOnLineY);
startPositionX = second_line_point->x;
startPositionY = second_line_point->y;
break;
}
case ARROW_POSITION_END:
{
// If we're using a proportional offset, calculate just where this will
// be on the line.
double realOffset = xOffset;
if (proportionalOffset)
{
double totalLength =
(double)sqrt((second_last_line_point->x - last_line_point->x)*(second_last_line_point->x - last_line_point->x) +
(second_last_line_point->y - last_line_point->y)*(second_last_line_point->y - last_line_point->y));
realOffset = (double)(xOffset * totalLength);
}
GetPointOnLine(second_last_line_point->x, second_last_line_point->y,
last_line_point->x, last_line_point->y,
realOffset, &positionOnLineX, &positionOnLineY);
startPositionX = second_last_line_point->x;
startPositionY = second_last_line_point->y;
break;
}
case ARROW_POSITION_MIDDLE:
{
// Choose a point half way between the last and penultimate points
double x = ((last_line_point->x + second_last_line_point->x)/2);
double y = ((last_line_point->y + second_last_line_point->y)/2);
// If we're using a proportional offset, calculate just where this will
// be on the line.
double realOffset = xOffset;
if (proportionalOffset)
{
double totalLength =
(double)sqrt((second_last_line_point->x - x)*(second_last_line_point->x - x) +
(second_last_line_point->y - y)*(second_last_line_point->y - y));
realOffset = (double)(xOffset * totalLength);
}
GetPointOnLine(second_last_line_point->x, second_last_line_point->y,
x, y, realOffset, &positionOnLineX, &positionOnLineY);
startPositionX = second_last_line_point->x;
startPositionY = second_last_line_point->y;
break;
}
}
/*
* Add yOffset to arrow, if any
*/
const double myPi = (double) M_PI;
// The translation that the y offset may give
double deltaX = 0.0;
double deltaY = 0.0;
if ((arrow->GetYOffset() != 0.0) && !m_ignoreArrowOffsets)
{
/*
|(x4, y4)
|d
|
(x1, y1)--------------(x3, y3)------------------(x2, y2)
x4 = x3 - d * sin(theta)
y4 = y3 + d * cos(theta)
Where theta = tan(-1) of (y3-y1)/(x3-x1)
*/
double x1 = startPositionX;
double y1 = startPositionY;
double x3 = positionOnLineX;
double y3 = positionOnLineY;
double d = -arrow->GetYOffset(); // Negate so +offset is above line
double theta;
if (x3 == x1)
theta = (double)(myPi/2.0);
else
theta = (double)atan((y3-y1)/(x3-x1));
double x4 = (double)(x3 - (d*sin(theta)));
double y4 = (double)(y3 + (d*cos(theta)));
deltaX = x4 - positionOnLineX;
deltaY = y4 - positionOnLineY;
}
switch (arrow->_GetType())
{
case ARROW_ARROW:
{
double arrowLength = arrow->GetSize();
double arrowWidth = (double)(arrowLength/3.0);
double tip_x, tip_y, side1_x, side1_y, side2_x, side2_y;
oglGetArrowPoints(startPositionX+deltaX, startPositionY+deltaY,
positionOnLineX+deltaX, positionOnLineY+deltaY,
arrowLength, arrowWidth, &tip_x, &tip_y,
&side1_x, &side1_y, &side2_x, &side2_y);
wxPoint points[4];
points[0].x = (int) tip_x; points[0].y = (int) tip_y;
points[1].x = (int) side1_x; points[1].y = (int) side1_y;
points[2].x = (int) side2_x; points[2].y = (int) side2_y;
points[3].x = (int) tip_x; points[3].y = (int) tip_y;
dc.SetPen(* m_pen);
dc.SetBrush(* m_brush);
dc.DrawPolygon(4, points);
break;
}
case ARROW_HOLLOW_CIRCLE:
case ARROW_FILLED_CIRCLE:
{
// Find point on line of centre of circle, which is a radius away
// from the end position
double diameter = (double)(arrow->GetSize());
double x, y;
GetPointOnLine(startPositionX+deltaX, startPositionY+deltaY,
positionOnLineX+deltaX, positionOnLineY+deltaY,
(double)(diameter/2.0),
&x, &y);
// Convert ellipse centre to top-left coordinates
double x1 = (double)(x - (diameter/2.0));
double y1 = (double)(y - (diameter/2.0));
dc.SetPen(* m_pen);
if (arrow->_GetType() == ARROW_HOLLOW_CIRCLE)
dc.SetBrush(GetBackgroundBrush());
else
dc.SetBrush(* m_brush);
dc.DrawEllipse((long) x1, (long) y1, (long) diameter, (long) diameter);
break;
}
case ARROW_SINGLE_OBLIQUE:
{
break;
}
case ARROW_METAFILE:
{
if (arrow->GetMetaFile())
{
// Find point on line of centre of object, which is a half-width away
// from the end position
/*
* width
* <-- start pos <-----><-- positionOnLineX
* _____
* --------------| x | <-- e.g. rectangular arrowhead
* -----
*/
double x, y;
GetPointOnLine(startPositionX, startPositionY,
positionOnLineX, positionOnLineY,
(double)(arrow->GetMetaFile()->m_width/2.0),
&x, &y);
// Calculate theta for rotating the metafile.
/*
|
| o(x2, y2) 'o' represents the arrowhead.
| /
| /
| /theta
| /(x1, y1)
|______________________
*/
double theta = 0.0;
double x1 = startPositionX;
double y1 = startPositionY;
double x2 = positionOnLineX;
double y2 = positionOnLineY;
if ((x1 == x2) && (y1 == y2))
theta = 0.0;
else if ((x1 == x2) && (y1 > y2))
theta = (double)(3.0*myPi/2.0);
else if ((x1 == x2) && (y2 > y1))
theta = (double)(myPi/2.0);
else if ((x2 > x1) && (y2 >= y1))
theta = (double)atan((y2 - y1)/(x2 - x1));
else if (x2 < x1)
theta = (double)(myPi + atan((y2 - y1)/(x2 - x1)));
else if ((x2 > x1) && (y2 < y1))
theta = (double)(2*myPi + atan((y2 - y1)/(x2 - x1)));
else
{
wxLogFatalError("Unknown arrowhead rotation case in lines.cc");
}
// Rotate about the centre of the object, then place
// the object on the line.
if (arrow->GetMetaFile()->GetRotateable())
arrow->GetMetaFile()->Rotate(0.0, 0.0, theta);
if (m_erasing)
{
// If erasing, just draw a rectangle.
double minX, minY, maxX, maxY;
arrow->GetMetaFile()->GetBounds(&minX, &minY, &maxX, &maxY);
// Make erasing rectangle slightly bigger or you get droppings.
int extraPixels = 4;
dc.DrawRectangle((long)(deltaX + x + minX - (extraPixels/2.0)), (long)(deltaY + y + minY - (extraPixels/2.0)),
(long)(maxX - minX + extraPixels), (long)(maxY - minY + extraPixels));
}
else
arrow->GetMetaFile()->Draw(dc, x+deltaX, y+deltaY);
}
break;
}
default:
{
}
}
}
void wxLineShape::OnErase(wxDC& dc)
{
const wxPen *old_pen = m_pen;
const wxBrush *old_brush = m_brush;
wxPen bg_pen = GetBackgroundPen();
wxBrush bg_brush = GetBackgroundBrush();
SetPen(&bg_pen);
SetBrush(&bg_brush);
double bound_x, bound_y;
GetBoundingBoxMax(&bound_x, &bound_y);
if (m_font) dc.SetFont(* m_font);
// Undraw text regions
for (int i = 0; i < 3; i++)
{
wxNode *node = m_regions.Item(i);
if (node)
{
double x, y;
wxShapeRegion *region = (wxShapeRegion *)node->GetData();
GetLabelPosition(i, &x, &y);
EraseRegion(dc, region, x, y);
}
}
// Undraw line
dc.SetPen(GetBackgroundPen());
dc.SetBrush(GetBackgroundBrush());
// Drawing over the line only seems to work if the line has a thickness
// of 1.
if (old_pen && (old_pen->GetWidth() > 1))
{
dc.DrawRectangle((long)(m_xpos - (bound_x/2.0) - 2.0), (long)(m_ypos - (bound_y/2.0) - 2.0),
(long)(bound_x+4.0), (long)(bound_y+4.0));
}
else
{
m_erasing = true;
GetEventHandler()->OnDraw(dc);
GetEventHandler()->OnEraseControlPoints(dc);
m_erasing = false;
}
if (old_pen) SetPen(old_pen);
if (old_brush) SetBrush(old_brush);
}
void wxLineShape::GetBoundingBoxMin(double *w, double *h)
{
double x1 = 10000;
double y1 = 10000;
double x2 = -10000;
double y2 = -10000;
wxNode *node = m_lineControlPoints->GetFirst();
while (node)
{
wxRealPoint *point = (wxRealPoint *)node->GetData();
if (point->x < x1) x1 = point->x;
if (point->y < y1) y1 = point->y;
if (point->x > x2) x2 = point->x;
if (point->y > y2) y2 = point->y;
node = node->GetNext();
}
*w = (double)(x2 - x1);
*h = (double)(y2 - y1);
}
/*
* For a node image of interest, finds the position of this arc
* amongst all the arcs which are attached to THIS SIDE of the node image,
* and the number of same.
*/
void wxLineShape::FindNth(wxShape *image, int *nth, int *no_arcs, bool incoming)
{
int n = -1;
int num = 0;
wxNode *node = image->GetLines().GetFirst();
int this_attachment;
if (image == m_to)
this_attachment = m_attachmentTo;
else
this_attachment = m_attachmentFrom;
// Find number of lines going into/out of this particular attachment point
while (node)
{
wxLineShape *line = (wxLineShape *)node->GetData();
if (line->m_from == image)
{
// This is the nth line attached to 'image'
if ((line == this) && !incoming)
n = num;
// Increment num count if this is the same side (attachment number)
if (line->m_attachmentFrom == this_attachment)
num ++;
}
if (line->m_to == image)
{
// This is the nth line attached to 'image'
if ((line == this) && incoming)
n = num;
// Increment num count if this is the same side (attachment number)
if (line->m_attachmentTo == this_attachment)
num ++;
}
node = node->GetNext();
}
*nth = n;
*no_arcs = num;
}
void wxLineShape::OnDrawOutline(wxDC& dc, double WXUNUSED(x), double WXUNUSED(y), double WXUNUSED(w), double WXUNUSED(h))
{
const wxPen *old_pen = m_pen;
const wxBrush *old_brush = m_brush;
wxPen dottedPen(*wxBLACK, 1, wxDOT);
SetPen(& dottedPen);
SetBrush( wxTRANSPARENT_BRUSH );
GetEventHandler()->OnDraw(dc);
if (old_pen) SetPen(old_pen);
else SetPen(NULL);
if (old_brush) SetBrush(old_brush);
else SetBrush(NULL);
}
bool wxLineShape::OnMovePre(wxDC& dc, double x, double y, double old_x, double old_y, bool WXUNUSED(display))
{
double x_offset = x - old_x;
double y_offset = y - old_y;
if (m_lineControlPoints && !(x_offset == 0.0 && y_offset == 0.0))
{
wxNode *node = m_lineControlPoints->GetFirst();
while (node)
{
wxRealPoint *point = (wxRealPoint *)node->GetData();
point->x += x_offset;
point->y += y_offset;
node = node->GetNext();
}
}
// Move temporary label rectangles if necessary
for (int i = 0; i < 3; i++)
{
if (m_labelObjects[i])
{
m_labelObjects[i]->Erase(dc);
double xp, yp, xr, yr;
GetLabelPosition(i, &xp, &yp);