+++ /dev/null
-/////////////////////////////////////////////////////////////////////////////
-// Name: canvas.cpp
-// Purpose: Shape canvas class
-// Author: Julian Smart
-// Modified by:
-// Created: 12/07/98
-// RCS-ID: $Id$
-// Copyright: (c) Julian Smart
-// Licence: wxWindows licence
-/////////////////////////////////////////////////////////////////////////////
-
-#ifdef __GNUG__
-#pragma implementation "canvas.h"
-#endif
-
-// 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/wxexpr.h>
-
-#if wxUSE_IOSTREAMH
-#include <iostream.h>
-#else
-#include <iostream>
-#endif
-
-#include <ctype.h>
-#include <math.h>
-#include <stdlib.h>
-
-#include "basic.h"
-#include "basicp.h"
-#include "canvas.h"
-#include "ogldiag.h"
-#include "misc.h"
-#include "lines.h"
-#include "composit.h"
-
-#define CONTROL_POINT_SIZE 6
-
-// 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
-
-extern wxCursor *g_oglBullseyeCursor;
-
-IMPLEMENT_DYNAMIC_CLASS(wxShapeCanvas, wxScrolledWindow)
-
-BEGIN_EVENT_TABLE(wxShapeCanvas, wxScrolledWindow)
- EVT_PAINT(wxShapeCanvas::OnPaint)
- EVT_MOUSE_EVENTS(wxShapeCanvas::OnMouseEvent)
-END_EVENT_TABLE()
-
-// Object canvas
-wxShapeCanvas::wxShapeCanvas(wxWindow *parent, wxWindowID id, const wxPoint& pos, const wxSize& size, long style):
- wxScrolledWindow(parent, id, pos, size, style)
-{
- m_shapeDiagram = NULL;
- m_dragState = NoDragging;
- m_draggedShape = NULL;
- m_oldDragX = 0;
- m_oldDragY = 0;
- m_firstDragX = 0;
- m_firstDragY = 0;
- m_checkTolerance = TRUE;
-}
-
-wxShapeCanvas::~wxShapeCanvas()
-{
-}
-
-void wxShapeCanvas::OnPaint(wxPaintEvent& event)
-{
- wxPaintDC dc(this);
-
- PrepareDC(dc);
-
- dc.Clear();
-
- if (GetDiagram())
- GetDiagram()->Redraw(dc);
-}
-
-void wxShapeCanvas::OnMouseEvent(wxMouseEvent& event)
-{
- wxClientDC dc(this);
- PrepareDC(dc);
-
- wxPoint logPos(event.GetLogicalPosition(dc));
-
- double x, y;
- x = (double) logPos.x;
- y = (double) logPos.y;
-
- int keys = 0;
- if (event.ShiftDown())
- keys = keys | KEY_SHIFT;
- if (event.ControlDown())
- keys = keys | KEY_CTRL;
-
- bool dragging = event.Dragging();
-
- // Check if we're within the tolerance for mouse movements.
- // If we're very close to the position we started dragging
- // from, this may not be an intentional drag at all.
- if (dragging)
- {
- int dx = abs(dc.LogicalToDeviceX((long) (x - m_firstDragX)));
- int dy = abs(dc.LogicalToDeviceY((long) (y - m_firstDragY)));
- if (m_checkTolerance && (dx <= GetDiagram()->GetMouseTolerance()) && (dy <= GetDiagram()->GetMouseTolerance()))
- {
- return;
- }
- else
- // If we've ignored the tolerance once, then ALWAYS ignore
- // tolerance in this drag, even if we come back within
- // the tolerance range.
- m_checkTolerance = FALSE;
- }
-
- // Dragging - note that the effect of dragging is left entirely up
- // to the object, so no movement is done unless explicitly done by
- // object.
- if (dragging && m_draggedShape && m_dragState == StartDraggingLeft)
- {
- m_dragState = ContinueDraggingLeft;
-
- // If the object isn't m_draggable, transfer message to canvas
- if (m_draggedShape->Draggable())
- m_draggedShape->GetEventHandler()->OnBeginDragLeft((double)x, (double)y, keys, m_draggedAttachment);
- else
- {
- m_draggedShape = NULL;
- OnBeginDragLeft((double)x, (double)y, keys);
- }
-
- m_oldDragX = x; m_oldDragY = y;
- }
- else if (dragging && m_draggedShape && m_dragState == ContinueDraggingLeft)
- {
- // Continue dragging
- m_draggedShape->GetEventHandler()->OnDragLeft(FALSE, m_oldDragX, m_oldDragY, keys, m_draggedAttachment);
- m_draggedShape->GetEventHandler()->OnDragLeft(TRUE, (double)x, (double)y, keys, m_draggedAttachment);
- m_oldDragX = x; m_oldDragY = y;
- }
- else if (event.LeftUp() && m_draggedShape && m_dragState == ContinueDraggingLeft)
- {
- m_dragState = NoDragging;
- m_checkTolerance = TRUE;
-
- m_draggedShape->GetEventHandler()->OnDragLeft(FALSE, m_oldDragX, m_oldDragY, keys, m_draggedAttachment);
-
- m_draggedShape->GetEventHandler()->OnEndDragLeft((double)x, (double)y, keys, m_draggedAttachment);
- m_draggedShape = NULL;
- }
- else if (dragging && m_draggedShape && m_dragState == StartDraggingRight)
- {
- m_dragState = ContinueDraggingRight;
-
- if (m_draggedShape->Draggable())
- m_draggedShape->GetEventHandler()->OnBeginDragRight((double)x, (double)y, keys, m_draggedAttachment);
- else
- {
- m_draggedShape = NULL;
- OnBeginDragRight((double)x, (double)y, keys);
- }
- m_oldDragX = x; m_oldDragY = y;
- }
- else if (dragging && m_draggedShape && m_dragState == ContinueDraggingRight)
- {
- // Continue dragging
- m_draggedShape->GetEventHandler()->OnDragRight(FALSE, m_oldDragX, m_oldDragY, keys, m_draggedAttachment);
- m_draggedShape->GetEventHandler()->OnDragRight(TRUE, (double)x, (double)y, keys, m_draggedAttachment);
- m_oldDragX = x; m_oldDragY = y;
- }
- else if (event.RightUp() && m_draggedShape && m_dragState == ContinueDraggingRight)
- {
- m_dragState = NoDragging;
- m_checkTolerance = TRUE;
-
- m_draggedShape->GetEventHandler()->OnDragRight(FALSE, m_oldDragX, m_oldDragY, keys, m_draggedAttachment);
-
- m_draggedShape->GetEventHandler()->OnEndDragRight((double)x, (double)y, keys, m_draggedAttachment);
- m_draggedShape = NULL;
- }
-
- // All following events sent to canvas, not object
- else if (dragging && !m_draggedShape && m_dragState == StartDraggingLeft)
- {
- m_dragState = ContinueDraggingLeft;
- OnBeginDragLeft((double)x, (double)y, keys);
- m_oldDragX = x; m_oldDragY = y;
- }
- else if (dragging && !m_draggedShape && m_dragState == ContinueDraggingLeft)
- {
- // Continue dragging
- OnDragLeft(FALSE, m_oldDragX, m_oldDragY, keys);
- OnDragLeft(TRUE, (double)x, (double)y, keys);
- m_oldDragX = x; m_oldDragY = y;
- }
- else if (event.LeftUp() && !m_draggedShape && m_dragState == ContinueDraggingLeft)
- {
- m_dragState = NoDragging;
- m_checkTolerance = TRUE;
-
- OnDragLeft(FALSE, m_oldDragX, m_oldDragY, keys);
- OnEndDragLeft((double)x, (double)y, keys);
- m_draggedShape = NULL;
- }
- else if (dragging && !m_draggedShape && m_dragState == StartDraggingRight)
- {
- m_dragState = ContinueDraggingRight;
- OnBeginDragRight((double)x, (double)y, keys);
- m_oldDragX = x; m_oldDragY = y;
- }
- else if (dragging && !m_draggedShape && m_dragState == ContinueDraggingRight)
- {
- // Continue dragging
- OnDragRight(FALSE, m_oldDragX, m_oldDragY, keys);
- OnDragRight(TRUE, (double)x, (double)y, keys);
- m_oldDragX = x; m_oldDragY = y;
- }
- else if (event.RightUp() && !m_draggedShape && m_dragState == ContinueDraggingRight)
- {
- m_dragState = NoDragging;
- m_checkTolerance = TRUE;
-
- OnDragRight(FALSE, m_oldDragX, m_oldDragY, keys);
- OnEndDragRight((double)x, (double)y, keys);
- m_draggedShape = NULL;
- }
-
- // Non-dragging events
- else if (event.IsButton())
- {
- m_checkTolerance = TRUE;
-
- // Find the nearest object
- int attachment = 0;
- wxShape *nearest_object = FindShape(x, y, &attachment);
- if (nearest_object) // Object event
- {
- if (event.LeftDown())
- {
- m_draggedShape = nearest_object;
- m_draggedAttachment = attachment;
- m_dragState = StartDraggingLeft;
- m_firstDragX = x;
- m_firstDragY = y;
- }
- else if (event.LeftUp())
- {
- // N.B. Only register a click if the same object was
- // identified for down *and* up.
- if (nearest_object == m_draggedShape)
- nearest_object->GetEventHandler()->OnLeftClick((double)x, (double)y, keys, attachment);
-
- m_draggedShape = NULL;
- m_dragState = NoDragging;
- }
- else if (event.LeftDClick())
- {
- nearest_object->GetEventHandler()->OnLeftDoubleClick((double)x, (double)y, keys, attachment);
-
- m_draggedShape = NULL;
- m_dragState = NoDragging;
- }
- else if (event.RightDown())
- {
- m_draggedShape = nearest_object;
- m_draggedAttachment = attachment;
- m_dragState = StartDraggingRight;
- m_firstDragX = x;
- m_firstDragY = y;
- }
- else if (event.RightUp())
- {
- if (nearest_object == m_draggedShape)
- nearest_object->GetEventHandler()->OnRightClick((double)x, (double)y, keys, attachment);
-
- m_draggedShape = NULL;
- m_dragState = NoDragging;
- }
- }
- else // Canvas event (no nearest object)
- {
- if (event.LeftDown())
- {
- m_draggedShape = NULL;
- m_dragState = StartDraggingLeft;
- m_firstDragX = x;
- m_firstDragY = y;
- }
- else if (event.LeftUp())
- {
- OnLeftClick((double)x, (double)y, keys);
-
- m_draggedShape = NULL;
- m_dragState = NoDragging;
- }
- else if (event.RightDown())
- {
- m_draggedShape = NULL;
- m_dragState = StartDraggingRight;
- m_firstDragX = x;
- m_firstDragY = y;
- }
- else if (event.RightUp())
- {
- OnRightClick((double)x, (double)y, keys);
-
- m_draggedShape = NULL;
- m_dragState = NoDragging;
- }
- }
- }
-}
-
-/*
- * Try to find a sensitive object, working up the hierarchy of composites.
- *
- */
-wxShape *wxShapeCanvas::FindFirstSensitiveShape(double x, double y, int *new_attachment, int op)
-{
- wxShape *image = FindShape(x, y, new_attachment);
- if (!image) return NULL;
-
- wxShape *actualImage = FindFirstSensitiveShape1(image, op);
- if (actualImage)
- {
- double dist;
- // Find actual attachment
- actualImage->HitTest(x, y, new_attachment, &dist);
- }
- return actualImage;
-}
-
-wxShape *wxShapeCanvas::FindFirstSensitiveShape1(wxShape *image, int op)
-{
- if (image->GetSensitivityFilter() & op)
- return image;
- if (image->GetParent())
- return FindFirstSensitiveShape1(image->GetParent(), op);
- return NULL;
-}
-
-// Helper function: TRUE if 'contains' wholly contains 'contained'.
-static bool WhollyContains(wxShape *contains, wxShape *contained)
-{
- double xp1, yp1, xp2, yp2;
- double w1, h1, w2, h2;
- double left1, top1, right1, bottom1, left2, top2, right2, bottom2;
-
- xp1 = contains->GetX(); yp1 = contains->GetY(); xp2 = contained->GetX(); yp2 = contained->GetY();
- contains->GetBoundingBoxMax(&w1, &h1);
- contained->GetBoundingBoxMax(&w2, &h2);
-
- left1 = (double)(xp1 - (w1 / 2.0));
- top1 = (double)(yp1 - (h1 / 2.0));
- right1 = (double)(xp1 + (w1 / 2.0));
- bottom1 = (double)(yp1 + (h1 / 2.0));
-
- left2 = (double)(xp2 - (w2 / 2.0));
- top2 = (double)(yp2 - (h2 / 2.0));
- right2 = (double)(xp2 + (w2 / 2.0));
- bottom2 = (double)(yp2 + (h2 / 2.0));
-
- return ((left1 <= left2) && (top1 <= top2) && (right1 >= right2) && (bottom1 >= bottom2));
-}
-
-wxShape *wxShapeCanvas::FindShape(double x, double y, int *attachment, wxClassInfo *info, wxShape *notObject)
-{
- double nearest = 100000.0;
- int nearest_attachment = 0;
- wxShape *nearest_object = NULL;
-
- // Go backward through the object list, since we want:
- // (a) to have the control points drawn LAST to overlay
- // the other objects
- // (b) to find the control points FIRST if they exist
-
- wxNode *current = GetDiagram()->GetShapeList()->Last();
- while (current)
- {
- wxShape *object = (wxShape *)current->Data();
-
- double dist;
- int temp_attachment;
-
- // First pass for lines, which might be inside a container, so we
- // want lines to take priority over containers. This first loop
- // could fail if we clickout side a line, so then we'll
- // try other shapes.
- if (object->IsShown() &&
- object->IsKindOf(CLASSINFO(wxLineShape)) &&
- object->HitTest(x, y, &temp_attachment, &dist) &&
- ((info == NULL) || object->IsKindOf(info)) &&
- (!notObject || !notObject->HasDescendant(object)))
- {
- // A line is trickier to spot than a normal object.
- // For a line, since it's the diagonal of the box
- // we use for the hit test, we may have several
- // lines in the box and therefore we need to be able
- // to specify the nearest point to the centre of the line
- // as our hit criterion, to give the user some room for
- // manouevre.
- if (dist < nearest)
- {
- nearest = dist;
- nearest_object = object;
- nearest_attachment = temp_attachment;
- }
- }
- if (current)
- current = current->Previous();
- }
-
- current = GetDiagram()->GetShapeList()->Last();
- while (current)
- {
- wxShape *object = (wxShape *)current->Data();
- double dist;
- int temp_attachment;
-
- // On second pass, only ever consider non-composites or divisions. If children want to pass
- // up control to the composite, that's up to them.
- if (object->IsShown() && (object->IsKindOf(CLASSINFO(wxDivisionShape)) || !object->IsKindOf(CLASSINFO(wxCompositeShape)))
- && object->HitTest(x, y, &temp_attachment, &dist) && ((info == NULL) || object->IsKindOf(info)) &&
- (!notObject || !notObject->HasDescendant(object)))
- {
- if (!object->IsKindOf(CLASSINFO(wxLineShape)))
- {
- // If we've hit a container, and we have already found a line in the
- // first pass, then ignore the container in case the line is in the container.
- // Check for division in case line straddles divisions (i.e. is not wholly contained).
- if (!nearest_object || !(object->IsKindOf(CLASSINFO(wxDivisionShape)) || WhollyContains(object, nearest_object)))
- {
- nearest = dist;
- nearest_object = object;
- nearest_attachment = temp_attachment;
- current = NULL;
- }
- }
- }
- if (current)
- current = current->Previous();
- }
-
- *attachment = nearest_attachment;
- return nearest_object;
-}
-
-/*
- * Higher-level events called by OnEvent
- *
- */
-
-void wxShapeCanvas::OnLeftClick(double x, double y, int keys)
-{
-}
-
-void wxShapeCanvas::OnRightClick(double x, double y, int keys)
-{
-}
-
-void wxShapeCanvas::OnDragLeft(bool draw, double x, double y, int keys)
-{
-}
-
-void wxShapeCanvas::OnBeginDragLeft(double x, double y, int keys)
-{
-}
-
-void wxShapeCanvas::OnEndDragLeft(double x, double y, int keys)
-{
-}
-
-void wxShapeCanvas::OnDragRight(bool draw, double x, double y, int keys)
-{
-}
-
-void wxShapeCanvas::OnBeginDragRight(double x, double y, int keys)
-{
-}
-
-void wxShapeCanvas::OnEndDragRight(double x, double y, int keys)
-{
-}
-
-void wxShapeCanvas::AddShape(wxShape *object, wxShape *addAfter)
- { GetDiagram()->AddShape(object, addAfter); }
-void wxShapeCanvas::InsertShape(wxShape *object)
- { GetDiagram()->InsertShape(object); }
-void wxShapeCanvas::RemoveShape(wxShape *object)
- { GetDiagram()->RemoveShape(object); }
-bool wxShapeCanvas::GetQuickEditMode()
- { return GetDiagram()->GetQuickEditMode(); }
-void wxShapeCanvas::Redraw(wxDC& dc)
- { GetDiagram()->Redraw(dc); }
-void wxShapeCanvas::Snap(double *x, double *y)
- { GetDiagram()->Snap(x, y); }
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