Files
wxWidgets/src/common/layout.cpp
Vadim Zeitlin 3f66f6a5b3 Remove all lines containing cvs/svn "$Id$" keyword.
This keyword is not expanded by Git which means it's not replaced with the
correct revision value in the releases made using git-based scripts and it's
confusing to have lines with unexpanded "$Id$" in the released files. As
expanding them with Git is not that simple (it could be done with git archive
and export-subst attribute) and there are not many benefits in having them in
the first place, just remove all these lines.

If nothing else, this will make an eventual transition to Git simpler.

Closes #14487.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74602 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2013-07-26 16:02:46 +00:00

1026 lines
34 KiB
C++

/////////////////////////////////////////////////////////////////////////////
// Name: src/common/layout.cpp
// Purpose: Constraint layout system classes
// Author: Julian Smart
// Modified by:
// Created: 04/01/98
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// =============================================================================
// declarations
// =============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_CONSTRAINTS
#include "wx/layout.h"
#ifndef WX_PRECOMP
#include "wx/window.h"
#include "wx/utils.h"
#include "wx/dialog.h"
#include "wx/msgdlg.h"
#include "wx/intl.h"
#endif
IMPLEMENT_DYNAMIC_CLASS(wxIndividualLayoutConstraint, wxObject)
IMPLEMENT_DYNAMIC_CLASS(wxLayoutConstraints, wxObject)
inline void wxGetAsIs(wxWindowBase* win, int* w, int* h)
{
#if 1
// The old way. Works for me.
win->GetSize(w, h);
#endif
#if 0
// Vadim's change. Breaks wxPython's LayoutAnchors
win->GetBestSize(w, h);
#endif
#if 0
// Proposed compromise. Doesn't work.
int sw, sh, bw, bh;
win->GetSize(&sw, &sh);
win->GetBestSize(&bw, &bh);
if (w)
*w = wxMax(sw, bw);
if (h)
*h = wxMax(sh, bh);
#endif
}
wxIndividualLayoutConstraint::wxIndividualLayoutConstraint()
{
myEdge = wxTop;
relationship = wxUnconstrained;
margin = 0;
value = 0;
percent = 0;
otherEdge = wxTop;
done = false;
otherWin = NULL;
}
void wxIndividualLayoutConstraint::Set(wxRelationship rel, wxWindowBase *otherW, wxEdge otherE, int val, int marg)
{
if (rel == wxSameAs)
{
// If Set is called by the user with wxSameAs then call SameAs to do
// it since it will actually use wxPercent instead.
SameAs(otherW, otherE, marg);
return;
}
relationship = rel;
otherWin = otherW;
otherEdge = otherE;
if ( rel == wxPercentOf )
{
percent = val;
}
else
{
value = val;
}
margin = marg;
}
void wxIndividualLayoutConstraint::LeftOf(wxWindowBase *sibling, int marg)
{
Set(wxLeftOf, sibling, wxLeft, 0, marg);
}
void wxIndividualLayoutConstraint::RightOf(wxWindowBase *sibling, int marg)
{
Set(wxRightOf, sibling, wxRight, 0, marg);
}
void wxIndividualLayoutConstraint::Above(wxWindowBase *sibling, int marg)
{
Set(wxAbove, sibling, wxTop, 0, marg);
}
void wxIndividualLayoutConstraint::Below(wxWindowBase *sibling, int marg)
{
Set(wxBelow, sibling, wxBottom, 0, marg);
}
//
// 'Same edge' alignment
//
void wxIndividualLayoutConstraint::SameAs(wxWindowBase *otherW, wxEdge edge, int marg)
{
Set(wxPercentOf, otherW, edge, 100, marg);
}
// The edge is a percentage of the other window's edge
void wxIndividualLayoutConstraint::PercentOf(wxWindowBase *otherW, wxEdge wh, int per)
{
Set(wxPercentOf, otherW, wh, per);
}
//
// Edge has absolute value
//
void wxIndividualLayoutConstraint::Absolute(int val)
{
value = val;
relationship = wxAbsolute;
}
// Reset constraint if it mentions otherWin
bool wxIndividualLayoutConstraint::ResetIfWin(wxWindowBase *otherW)
{
if (otherW == otherWin)
{
myEdge = wxTop;
relationship = wxAsIs;
margin = 0;
value = 0;
percent = 0;
otherEdge = wxTop;
otherWin = NULL;
return true;
}
return false;
}
// Try to satisfy constraint
bool wxIndividualLayoutConstraint::SatisfyConstraint(wxLayoutConstraints *constraints, wxWindowBase *win)
{
if (relationship == wxAbsolute)
{
done = true;
return true;
}
switch (myEdge)
{
case wxLeft:
{
switch (relationship)
{
case wxLeftOf:
{
// We can know this edge if: otherWin is win's
// parent, or otherWin has a satisfied constraint,
// or otherWin has no constraint.
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = edgePos - margin;
done = true;
return true;
}
else
return false;
}
case wxRightOf:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = edgePos + margin;
done = true;
return true;
}
else
return false;
}
case wxPercentOf:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = (int)(edgePos*(((float)percent)*0.01) + margin);
done = true;
return true;
}
else
return false;
}
case wxUnconstrained:
{
// We know the left-hand edge position if we know
// the right-hand edge and we know the width; OR if
// we know the centre and the width.
if (constraints->right.GetDone() && constraints->width.GetDone())
{
value = (constraints->right.GetValue() - constraints->width.GetValue() + margin);
done = true;
return true;
}
else if (constraints->centreX.GetDone() && constraints->width.GetDone())
{
value = (int)(constraints->centreX.GetValue() - (constraints->width.GetValue()/2) + margin);
done = true;
return true;
}
else
return false;
}
case wxAsIs:
{
int y;
win->GetPosition(&value, &y);
done = true;
return true;
}
default:
break;
}
break;
}
case wxRight:
{
switch (relationship)
{
case wxLeftOf:
{
// We can know this edge if: otherWin is win's
// parent, or otherWin has a satisfied constraint,
// or otherWin has no constraint.
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = edgePos - margin;
done = true;
return true;
}
else
return false;
}
case wxRightOf:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = edgePos + margin;
done = true;
return true;
}
else
return false;
}
case wxPercentOf:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = (int)(edgePos*(((float)percent)*0.01) - margin);
done = true;
return true;
}
else
return false;
}
case wxUnconstrained:
{
// We know the right-hand edge position if we know the
// left-hand edge and we know the width, OR if we know the
// centre edge and the width.
if (constraints->left.GetDone() && constraints->width.GetDone())
{
value = (constraints->left.GetValue() + constraints->width.GetValue() - margin);
done = true;
return true;
}
else if (constraints->centreX.GetDone() && constraints->width.GetDone())
{
value = (int)(constraints->centreX.GetValue() + (constraints->width.GetValue()/2) - margin);
done = true;
return true;
}
else
return false;
}
case wxAsIs:
{
int x, y;
int w, h;
wxGetAsIs(win, &w, &h);
win->GetPosition(&x, &y);
value = x + w;
done = true;
return true;
}
default:
break;
}
break;
}
case wxTop:
{
switch (relationship)
{
case wxAbove:
{
// We can know this edge if: otherWin is win's
// parent, or otherWin has a satisfied constraint,
// or otherWin has no constraint.
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = edgePos - margin;
done = true;
return true;
}
else
return false;
}
case wxBelow:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = edgePos + margin;
done = true;
return true;
}
else
return false;
}
case wxPercentOf:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = (int)(edgePos*(((float)percent)*0.01) + margin);
done = true;
return true;
}
else
return false;
}
case wxUnconstrained:
{
// We know the top edge position if we know the bottom edge
// and we know the height; OR if we know the centre edge and
// the height.
if (constraints->bottom.GetDone() && constraints->height.GetDone())
{
value = (constraints->bottom.GetValue() - constraints->height.GetValue() + margin);
done = true;
return true;
}
else if (constraints->centreY.GetDone() && constraints->height.GetDone())
{
value = (constraints->centreY.GetValue() - (constraints->height.GetValue()/2) + margin);
done = true;
return true;
}
else
return false;
}
case wxAsIs:
{
int x;
win->GetPosition(&x, &value);
done = true;
return true;
}
default:
break;
}
break;
}
case wxBottom:
{
switch (relationship)
{
case wxAbove:
{
// We can know this edge if: otherWin is win's parent,
// or otherWin has a satisfied constraint, or
// otherWin has no constraint.
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = edgePos + margin;
done = true;
return true;
}
else
return false;
}
case wxBelow:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = edgePos - margin;
done = true;
return true;
}
else
return false;
}
case wxPercentOf:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = (int)(edgePos*(((float)percent)*0.01) - margin);
done = true;
return true;
}
else
return false;
}
case wxUnconstrained:
{
// We know the bottom edge position if we know the top edge
// and we know the height; OR if we know the centre edge and
// the height.
if (constraints->top.GetDone() && constraints->height.GetDone())
{
value = (constraints->top.GetValue() + constraints->height.GetValue() - margin);
done = true;
return true;
}
else if (constraints->centreY.GetDone() && constraints->height.GetDone())
{
value = (constraints->centreY.GetValue() + (constraints->height.GetValue()/2) - margin);
done = true;
return true;
}
else
return false;
}
case wxAsIs:
{
int x, y;
int w, h;
wxGetAsIs(win, &w, &h);
win->GetPosition(&x, &y);
value = h + y;
done = true;
return true;
}
default:
break;
}
break;
}
case wxCentreX:
{
switch (relationship)
{
case wxLeftOf:
{
// We can know this edge if: otherWin is win's parent, or
// otherWin has a satisfied constraint, or otherWin has no
// constraint.
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = edgePos - margin;
done = true;
return true;
}
else
return false;
}
case wxRightOf:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = edgePos + margin;
done = true;
return true;
}
else
return false;
}
case wxPercentOf:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = (int)(edgePos*(((float)percent)*0.01) + margin);
done = true;
return true;
}
else
return false;
}
case wxUnconstrained:
{
// We know the centre position if we know
// the left-hand edge and we know the width, OR
// the right-hand edge and the width
if (constraints->left.GetDone() && constraints->width.GetDone())
{
value = (int)(constraints->left.GetValue() + (constraints->width.GetValue()/2) + margin);
done = true;
return true;
}
else if (constraints->right.GetDone() && constraints->width.GetDone())
{
value = (int)(constraints->left.GetValue() - (constraints->width.GetValue()/2) + margin);
done = true;
return true;
}
else
return false;
}
default:
break;
}
break;
}
case wxCentreY:
{
switch (relationship)
{
case wxAbove:
{
// We can know this edge if: otherWin is win's parent,
// or otherWin has a satisfied constraint, or otherWin
// has no constraint.
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = edgePos - margin;
done = true;
return true;
}
else
return false;
}
case wxBelow:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = edgePos + margin;
done = true;
return true;
}
else
return false;
}
case wxPercentOf:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = (int)(edgePos*(((float)percent)*0.01) + margin);
done = true;
return true;
}
else
return false;
}
case wxUnconstrained:
{
// We know the centre position if we know
// the top edge and we know the height, OR
// the bottom edge and the height.
if (constraints->bottom.GetDone() && constraints->height.GetDone())
{
value = (int)(constraints->bottom.GetValue() - (constraints->height.GetValue()/2) + margin);
done = true;
return true;
}
else if (constraints->top.GetDone() && constraints->height.GetDone())
{
value = (int)(constraints->top.GetValue() + (constraints->height.GetValue()/2) + margin);
done = true;
return true;
}
else
return false;
}
default:
break;
}
break;
}
case wxWidth:
{
switch (relationship)
{
case wxPercentOf:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = (int)(edgePos*(((float)percent)*0.01));
done = true;
return true;
}
else
return false;
}
case wxAsIs:
{
if (win)
{
int h;
wxGetAsIs(win, &value, &h);
done = true;
return true;
}
else return false;
}
case wxUnconstrained:
{
// We know the width if we know the left edge and the right edge, OR
// if we know the left edge and the centre, OR
// if we know the right edge and the centre
if (constraints->left.GetDone() && constraints->right.GetDone())
{
value = constraints->right.GetValue() - constraints->left.GetValue();
done = true;
return true;
}
else if (constraints->centreX.GetDone() && constraints->left.GetDone())
{
value = (int)(2*(constraints->centreX.GetValue() - constraints->left.GetValue()));
done = true;
return true;
}
else if (constraints->centreX.GetDone() && constraints->right.GetDone())
{
value = (int)(2*(constraints->right.GetValue() - constraints->centreX.GetValue()));
done = true;
return true;
}
else
return false;
}
default:
break;
}
break;
}
case wxHeight:
{
switch (relationship)
{
case wxPercentOf:
{
int edgePos = GetEdge(otherEdge, win, otherWin);
if (edgePos != -1)
{
value = (int)(edgePos*(((float)percent)*0.01));
done = true;
return true;
}
else
return false;
}
case wxAsIs:
{
if (win)
{
int w;
wxGetAsIs(win, &w, &value);
done = true;
return true;
}
else return false;
}
case wxUnconstrained:
{
// We know the height if we know the top edge and the bottom edge, OR
// if we know the top edge and the centre, OR
// if we know the bottom edge and the centre
if (constraints->top.GetDone() && constraints->bottom.GetDone())
{
value = constraints->bottom.GetValue() - constraints->top.GetValue();
done = true;
return true;
}
else if (constraints->top.GetDone() && constraints->centreY.GetDone())
{
value = (int)(2*(constraints->centreY.GetValue() - constraints->top.GetValue()));
done = true;
return true;
}
else if (constraints->bottom.GetDone() && constraints->centreY.GetDone())
{
value = (int)(2*(constraints->bottom.GetValue() - constraints->centreY.GetValue()));
done = true;
return true;
}
else
return false;
}
default:
break;
}
break;
}
default:
break;
}
return false;
}
// Get the value of this edge or dimension, or if this is not determinable, -1.
int wxIndividualLayoutConstraint::GetEdge(wxEdge which,
wxWindowBase *thisWin,
wxWindowBase *other) const
{
// If the edge or dimension belongs to the parent, then we know the
// dimension is obtainable immediately. E.g. a wxExpandSizer may contain a
// button (but the button's true parent is a panel, not the sizer)
if (other->GetChildren().Find((wxWindow*)thisWin))
{
switch (which)
{
case wxLeft:
{
return 0;
}
case wxTop:
{
return 0;
}
case wxRight:
{
int w, h;
other->GetClientSizeConstraint(&w, &h);
return w;
}
case wxBottom:
{
int w, h;
other->GetClientSizeConstraint(&w, &h);
return h;
}
case wxWidth:
{
int w, h;
other->GetClientSizeConstraint(&w, &h);
return w;
}
case wxHeight:
{
int w, h;
other->GetClientSizeConstraint(&w, &h);
return h;
}
case wxCentreX:
case wxCentreY:
{
int w, h;
other->GetClientSizeConstraint(&w, &h);
if (which == wxCentreX)
return (int)(w/2);
else
return (int)(h/2);
}
default:
return -1;
}
}
switch (which)
{
case wxLeft:
{
wxLayoutConstraints *constr = other->GetConstraints();
// If no constraints, it means the window is not dependent
// on anything, and therefore we know its value immediately
if (constr)
{
if (constr->left.GetDone())
return constr->left.GetValue();
else
return -1;
}
else
{
int x, y;
other->GetPosition(&x, &y);
return x;
}
}
case wxTop:
{
wxLayoutConstraints *constr = other->GetConstraints();
// If no constraints, it means the window is not dependent
// on anything, and therefore we know its value immediately
if (constr)
{
if (constr->top.GetDone())
return constr->top.GetValue();
else
return -1;
}
else
{
int x, y;
other->GetPosition(&x, &y);
return y;
}
}
case wxRight:
{
wxLayoutConstraints *constr = other->GetConstraints();
// If no constraints, it means the window is not dependent
// on anything, and therefore we know its value immediately
if (constr)
{
if (constr->right.GetDone())
return constr->right.GetValue();
else
return -1;
}
else
{
int x, y, w, h;
other->GetPosition(&x, &y);
other->GetSize(&w, &h);
return (int)(x + w);
}
}
case wxBottom:
{
wxLayoutConstraints *constr = other->GetConstraints();
// If no constraints, it means the window is not dependent
// on anything, and therefore we know its value immediately
if (constr)
{
if (constr->bottom.GetDone())
return constr->bottom.GetValue();
else
return -1;
}
else
{
int x, y, w, h;
other->GetPosition(&x, &y);
other->GetSize(&w, &h);
return (int)(y + h);
}
}
case wxWidth:
{
wxLayoutConstraints *constr = other->GetConstraints();
// If no constraints, it means the window is not dependent
// on anything, and therefore we know its value immediately
if (constr)
{
if (constr->width.GetDone())
return constr->width.GetValue();
else
return -1;
}
else
{
int w, h;
other->GetSize(&w, &h);
return w;
}
}
case wxHeight:
{
wxLayoutConstraints *constr = other->GetConstraints();
// If no constraints, it means the window is not dependent
// on anything, and therefore we know its value immediately
if (constr)
{
if (constr->height.GetDone())
return constr->height.GetValue();
else
return -1;
}
else
{
int w, h;
other->GetSize(&w, &h);
return h;
}
}
case wxCentreX:
{
wxLayoutConstraints *constr = other->GetConstraints();
// If no constraints, it means the window is not dependent
// on anything, and therefore we know its value immediately
if (constr)
{
if (constr->centreX.GetDone())
return constr->centreX.GetValue();
else
return -1;
}
else
{
int x, y, w, h;
other->GetPosition(&x, &y);
other->GetSize(&w, &h);
return (int)(x + (w/2));
}
}
case wxCentreY:
{
wxLayoutConstraints *constr = other->GetConstraints();
// If no constraints, it means the window is not dependent
// on anything, and therefore we know its value immediately
if (constr)
{
if (constr->centreY.GetDone())
return constr->centreY.GetValue();
else
return -1;
}
else
{
int x, y, w, h;
other->GetPosition(&x, &y);
other->GetSize(&w, &h);
return (int)(y + (h/2));
}
}
default:
break;
}
return -1;
}
wxLayoutConstraints::wxLayoutConstraints()
{
left.SetEdge(wxLeft);
top.SetEdge(wxTop);
right.SetEdge(wxRight);
bottom.SetEdge(wxBottom);
centreX.SetEdge(wxCentreX);
centreY.SetEdge(wxCentreY);
width.SetEdge(wxWidth);
height.SetEdge(wxHeight);
}
bool wxLayoutConstraints::SatisfyConstraints(wxWindowBase *win, int *nChanges)
{
int noChanges = 0;
bool done = width.GetDone();
bool newDone = (done ? true : width.SatisfyConstraint(this, win));
if (newDone != done)
noChanges ++;
done = height.GetDone();
newDone = (done ? true : height.SatisfyConstraint(this, win));
if (newDone != done)
noChanges ++;
done = left.GetDone();
newDone = (done ? true : left.SatisfyConstraint(this, win));
if (newDone != done)
noChanges ++;
done = top.GetDone();
newDone = (done ? true : top.SatisfyConstraint(this, win));
if (newDone != done)
noChanges ++;
done = right.GetDone();
newDone = (done ? true : right.SatisfyConstraint(this, win));
if (newDone != done)
noChanges ++;
done = bottom.GetDone();
newDone = (done ? true : bottom.SatisfyConstraint(this, win));
if (newDone != done)
noChanges ++;
done = centreX.GetDone();
newDone = (done ? true : centreX.SatisfyConstraint(this, win));
if (newDone != done)
noChanges ++;
done = centreY.GetDone();
newDone = (done ? true : centreY.SatisfyConstraint(this, win));
if (newDone != done)
noChanges ++;
*nChanges = noChanges;
return AreSatisfied();
}
#endif // wxUSE_CONSTRAINTS