Dynamically add controls into wxFlexGridsizer inside wxScrolledWindow - no resize

[heinermueller]

Hello Everybody,

we add controls into a wxFlexGridSizer which is inside a wxScrolledWindow. When the dialog shows up, it is not resized to a proper size. Dialog creation and setup is like this:

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dialog_config_mismatch d(nullptr, wxID_ANY, _(warn));
wxFont font(wxNORMAL_FONT->GetPointSize(), wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_BOLD, false, wxEmptyString);

auto s1 = new wxStaticText(&d, wxID_ANY, display_path, wxDefaultPosition, wxDefaultSize, wxALIGN_LEFT);
s1->Wrap(-1);
s1->SetFont(font);
d.m_mainsizer->Add(s1, 0, wxALL, 5);

auto s2 = new wxStaticText(&d, wxID_ANY, t.default_value, wxDefaultPosition, wxDefaultSize, wxALIGN_LEFT);
s2->Wrap(-1);
d.m_mainsizer->Add(s2, 0, wxALL, 5);

auto r1 = new wxRadioButton(&d, wxID_ANY, wxString() << system_value, wxDefaultPosition, wxDefaultSize, wxRB_GROUP|wxALIGN_LEFT);
r1->SetValue(true);
d.m_mainsizer->Add(r1, 0, wxALL, 5);

auto r2 = new wxRadioButton(&d, wxID_ANY, wxString() << t.project_value, wxDefaultPosition, wxDefaultSize, wxALIGN_LEFT);
d.m_mainsizer->Add(r2, 0, wxALL, 5);

auto s3 = new wxStaticText(&d, wxID_ANY, t.restart_flag, wxDefaultPosition, wxDefaultSize, wxALIGN_CENTER_HORIZONTAL);
d.m_mainsizer->Add(s3, 0, wxALIGN_CENTER_HORIZONTAL | wxALL, 5);
	
d.m_mainsizer->Layout();
d.m_scrolledWindow1->SetSize(600, 200);
d.m_scrolledWindow1->FitInside();

d.m_main_vertical_boxsizer->Fit(&d);
d.Layout();

So the wxScrolledWindow size should be 600x200px, and the wxFlexGridSizer (which is a bit larger, ca. 600x400) should be inside with scrollbars. But the dialog looks like this:





This is how the dialog is set up in wxFormBuilder:




It should display another grid row with 5 wxStaticText controls. Does anyone know why the dialog does not expand to the 600x200px requested in

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d.m_scrolledWindow1->SetSize(600, 200);

Best,
Heiner

[catalin]

I wonder how you (or the UI builder's creators) manage to output such convoluted code. But the first thing that is obviously wrong is the parent of the UI elements ("&d" everywhere). From your description there is an intermediary scrolled window there, in which case it should be the parent of all elements that it is supposed to contain and its sizer is supposed to layout.

[heinermueller]

Thanks for the parent hint! When i resize the window, it draws and works correctly now. The dialog opens almost with the correct size now. This code sequence:

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const wxSize desired_client_size(600, 250);
d.m_scrolledWindow1->SetSize(desired_client_size);
d.m_scrolledWindow1->FitInside();
d.m_mainsizer->Layout();
d.m_mainsizer->SetSizeHints(&d);
d.Layout();
if (d.ShowModal())
{
...
}

results in a bit too small of a dialog window:



How can we avoid the horizontal scroll bar in this case, let the dialog have the exact client to match the wxScrolledWindow size with scrollbar? Thanks for helping advice!

[doublemax]

You can get the width of a vertical scrollbar with:

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#include <wx/settings.h>
///
wxSystemSettings::GetMetric(wxSYS_VSCROLL_X)

Make the client area of the dialog bigger by that amount, so that there is always room for the scrollbar.

BTW:

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d.m_scrolledWindow1->SetSize(desired_client_size);
d.m_scrolledWindow1->FitInside();
d.m_mainsizer->Layout();
d.m_mainsizer->SetSizeHints(&d);
d.Layout();

Manipulating a member variable of the dialog "from outside" is ugly. This code should be in the dialog constructor.

[heinermueller]

Hi doublemax,

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wxSystemSettings::GetMetric(wxSYS_VSCROLL_X)

Thanks for the hint - am i expected to calculate the dialog width or can i automate this? Actually i expected that

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d.Layout();

would take a scrollbar existence/visibility into account and resize the dialogs client size accordingly. Is there a possibility to automate this?

PS

Manipulating a member variable of the dialog "from outside" is ugly.

True, its done "straight and rough" here just for explanation purpose

PPS
Fantastic forum here, really helpful and quick!

[doublemax]

Thanks for the hint - am i expected to calculate the dialog width?

Yes.

...would take a scrollbar existence/visibility into account and resize the dialogs client size accordingly. Is there a possibility to automate this?

No.