wxwidgets/samples/layout/expt.cpp
Vadim Zeitlin 4f4c5fcfdf Use nullptr instead of NULL in the code and documentation
This is a combination of running clang-tidy with modernize-use-nullptr
check for some ports (GTK, X11, OSX) and manual changes to the ports for
which it couldn't be used easily (MSW, DFB) and also manually updating
the docs.

Also replace NULL with null or nullptr in the comments as this is more
consistent with the use of nullptr in the code and makes it simpler to
grep for the remaining occurrences of NULL itself.

And also use null in the assert messages.

Only a few occurrences of "NULL" are still left in non-C files, mostly
corresponding to unclear comments or string output which it might not be
safe to change.
2022-10-18 01:25:25 +02:00

161 lines
3.6 KiB
C++

/*
* Experimental code to use operators for constraint specification.
* In the end, the syntax didn't look much clearer than
* the original, so abandoned.
Example:
wxConstrain(frame->panel,
( leftOf (frame->panel) = leftOf (frame),
topOf (frame->panel) = topOf (frame),
rightOf (frame->panel) = rightOf (frame),
heightOf (frame->panel) = 50 % heightOf (frame)
)
);
*/
// Operator experiments
#define wxCONSTRAINT_OP_REL 1
#define wxCONSTRAINT_OP_PERCENT 2
#define wxCONSTRAINT_OP_EDGE 3
#define wxCONSTRAINT_OP_ABS 4
#define wxCONSTRAINT_OP_AND 5
class wxConstraintOp: public wxObject
{
public:
int opType;
wxEdge edge;
wxRelationship relationship;
wxWindow *win;
int value;
int margin;
wxConstraintOp *lhs;
wxConstraintOp *rhs;
wxConstraintOp(int typ)
{
opType = typ;
edge = wxLeft;
win = nullptr;
value = 0;
margin = 0;
relationship = wxSameAs;
lhs = 0; rhs = 0;
}
wxConstraintOp(const wxConstraintOp& op)
{
opType = op.opType;
edge = op.edge;
relationship = op.relationship;
win = op.win;
value = op.value;
margin = op.margin;
if (op.lhs)
lhs = new wxConstraintOp(*op.lhs);
else
lhs = nullptr;
if (op.rhs)
rhs = new wxConstraintOp(*op.rhs);
else
rhs = nullptr;
}
~wxConstraintOp(void)
{
if (lhs)
delete lhs;
if (rhs)
delete rhs;
}
wxConstraintOp operator = (const wxConstraintOp& arg2);
wxConstraintOp operator = (const int value);
friend wxConstraintOp operator % (const int perCent, const wxConstraintOp& arg2);
friend wxConstraintOp operator + (wxConstraintOp& arg1, int margin);
friend wxConstraintOp operator - (wxConstraintOp& arg1, int margin);
friend wxConstraintOp operator , (const wxConstraintOp& arg1, const wxConstraintOp& arg2);
};
wxConstraintOp leftOf(wxWindow *win)
{
wxConstraintOp thing(wxCONSTRAINT_OP_EDGE);
thing.win = win;
thing.edge = wxLeft;
return thing;
}
wxConstraintOp topOf(wxWindow *win)
{
wxConstraintOp thing(wxCONSTRAINT_OP_EDGE);
thing.win = win;
thing.edge = wxTop;
return thing;
}
wxConstraintOp widthOf(wxWindow *win)
{
wxConstraintOp thing(wxCONSTRAINT_OP_EDGE);
thing.win = win;
thing.edge = wxWidth;
return thing;
}
wxConstraintOp wxConstraintOp::operator = (const wxConstraintOp& arg2)
{
wxConstraintOp op3(wxCONSTRAINT_OP_REL);
op3.relationship = wxPercentOf;
op3.value = 100;
if ((op3.relationship == wxPercentOf) && (op3.value > 0))
op3.value = this->value;
op3.lhs = new wxConstraintOp(*this);
op3.rhs = new wxConstraintOp(arg2);
return op3;
}
wxConstraintOp wxConstraintOp::operator = (const int value)
{
wxConstraintOp op3(wxCONSTRAINT_OP_REL);
op3.relationship = wxAbsolute;
op3.lhs = new wxConstraintOp(*this);
op3.rhs = new wxConstraintOp(wxCONSTRAINT_OP_ABS);
op3.value = value;
return op3;
}
wxConstraintOp operator % (const int perCent, const wxConstraintOp& arg2)
{
wxConstraintOp op3(arg2);
op3.opType = wxCONSTRAINT_OP_EDGE;
op3.value = perCent;
if (op3.value > 0)
op3.value = arg2.value;
return op3;
}
wxConstraintOp operator + (wxConstraintOp& arg1, int margin)
{
wxConstraintOp op3(arg1);
op3.margin = margin;
return op3;
}
wxConstraintOp operator - (wxConstraintOp& arg1, int margin)
{
wxConstraintOp op3(arg1);
op3.margin = - margin;
return op3;
}
wxConstraintOp operator , (const wxConstraintOp& arg1, const wxConstraintOp& arg2)
{
wxConstraintOp op3(wxCONSTRAINT_OP_AND);
op3.lhs = new wxConstraintOp(arg1);
op3.rhs = new wxConstraintOp(arg2);
return op3;
}