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ArrayCtrl::Column lambda cleanup [message #48828] |
Sat, 07 October 2017 11:59 |
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mirek
Messages: 14039 Registered: November 2005
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Ultimate Member |
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I have noticed some lambda related overloading in ArrayCtrl::Column, so cleaned that up by adding some new methods (non-overloading). In the process, I have added reference example how to use them:
#include <CtrlLib/CtrlLib.h>
using namespace Upp;
GUI_APP_MAIN
{
ArrayCtrl list;
list.AddColumn("Trivial").Ctrls<EditString>(); // specify type of widget as template argument
list.AddColumn("Factory").With( // class factory creates widget - allows customization of widget
[](One<Ctrl>& x) {
x.Create<Option>().NoWantFocus();
}
);
list.AddColumn("Lined").WithLined( // passes the row index as the first argument
[](int line, One<Ctrl>& x)
{
if(line & 1)
x.Create<EditString>();
else
x.Create<Option>().SetLabel("Line " + AsString(line));
}
);
for(int i = 0; i < 300; i++)
list.Add(AsString(i), i & 1, AsString(i));
for(int i = 1; i < 300; i += 3)
list.GetCtrl(i, 0)->Disable();
list.SetLineCy(Draw::GetStdFontCy() + DPI(8));
TopWindow app;
app.Add(list.SizePos());
app.Sizeable();
app.Run();
}
#include <CtrlLib/CtrlLib.h>
using namespace Upp;
GUI_APP_MAIN
{
ArrayCtrl list;
list.AddColumn("Trivial").Sorting(); // with standard comparison
list.AddColumn("With sorting lambda").SortingBy( // sort with sorting function
[](int a, int b) -> int {
int q = SgnCompare(a % 100, b % 100);
if(q) return q;
return SgnCompare(a, b);
}
).SortDefault(); // set his column to be the initial sorting column;
list.AddColumn("Line comparison").SortingLined( // row indices passed to predicate
[&list](int i, int j) -> bool { // sort by sum of first two columns (as an example)
int a = int(list.Get(i, 0)) + int(list.Get(i, 1));
int b = int(list.Get(j, 0)) + int(list.Get(j, 1));
return list.IsSortDescending() ? b < a : a < b;
}
);
for(int i = 0; i < 300; i++)
list.Add((int)Random(1000), (int)Random(10000), 0);
TopWindow app;
app.Add(list.SizePos());
app.Sizeable();
list.DoColumnSort(); // sort by current sorting column (which is "With function" column because of SortDefault
app.Run();
}
[Updated on: Sat, 07 October 2017 15:26] Report message to a moderator
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