User Input Topic is solved

[bandali99]

Hi,

I want to add a text box where a user can input a number. The input would change the step size in my slider.
When I add

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wxTextCtrl *TextCtrl2 = new wxTextCtrl(panel, wxID_ANY, _("1"), wxPoint(1180, 180), wxSize(200, 40), 0, wxDefaultValidator, _T("ID_TEXTCTRL1"));

in the slider class it does not appear.

I just started using wxwidgets so im not too sure how these classes are supposed to interact with one another

[Kvaz1r]

Provide full code for reproducing the behaviour.

Btw there is samples folder that contains examples of using for biggest part of the library.

[bandali99]

Hey I got it working but now I need to take the input and use it to change the step size.

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void myDoubleSlider::OnWheel(wxMouseEvent& event)
{
	int m, w, h;
	wxClientDC dc(this);
	dc.GetSize(&w, &h);
	wxPoint pos = event.GetLogicalPosition(dc);
	pos.x = pos.x - SLIDER_MARGIN;
	pos.y = h - SLIDER_MARGIN - pos.y;
	if (event.GetWheelRotation() > 0)
		m = 1; //THESE CHANGE THE STEP SIZE
	else
		m = -1;
	if (pos.y < h / 2) {
		leftval -= m;
		if (leftval < minval)  leftval = minval;
		if (leftval >= rightval) leftval = rightval;
	}
	else if (pos.y > h / 2) {
		rightval -= m;
		if (rightval > maxval) rightval = maxval;
		if (rightval <= leftval) rightval = leftval + 1;
	}
	Refresh();
	Update();

The user should input a number in the text box and should be stored as a global variable, m, that will be accessed by this function.

[evstevemd]

Hey I got it working but now I need to take the input and use it to change the step size.

use wxTextCtrl::GetValue() to get string value and use wxAtoi() to change it to integer

[PB]

BTW, if the text control is for numbers only, you may consider using wxSpinCtrl instead of wxTextCtrl. With wxSpinCtrl you can be sure that the user entered a number and that number is within a range.

[bandali99]

Thanks for the tips, I decided to use SpinCtrl. I constructed a function which takes the value in the SpinCtrl and sets it as the step size. For some odd reason im getting an error saying that SpinCtrl1 is undefined on VS2017 but in code blocks the code runs fine. Any tips?

this is a snippet of my class:

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int stepsize = 1;
myDoubleSlider::myDoubleSlider(wxWindow *parent,
	wxWindowID id,
	int leftValue, int rightValue, int minValue, int maxValue,
	const wxPoint& pos,
	const wxSize& size,
	long style,
	const wxValidator& val,
	const wxString& name) : wxControl(parent, id, pos, size, wxBORDER_NONE)
{
	wxSpinCtrl* SpinCtrl1 = new wxSpinCtrl(this, wxID_ANY, _T("1"), wxPoint(1200, 200), wxDefaultSize, 0, 0, 100, 0, _T("ID_SPINCTRL1"));
	SpinCtrl1->SetValue(_T("1"));
	Connect(wxID_ANY, wxEVT_COMMAND_SPINCTRL_UPDATED, (wxObjectEventFunction)&myDoubleSlider::OnSpinCtrl1Change);
	
}

this is the function:

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void myDoubleSlider::OnSpinCtrl1Change(wxSpinEvent& event)
{
	stepsize = SpinCtrl1->GetValue(); //error here "SpinCtrl1" is undefined
}

[doublemax]

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wxSpinCtrl* SpinCtrl1 = new wxSpinCtrl(this, wxID_ANY, _T("1"), wxPoint(1200, 200), wxDefaultSize, 0, 0, 100, 0, _T("ID_SPINCTRL1"));

SpinCtrl1 is a local variable, so you can't access it from other methods. Turn it into a member variable.

[bandali99]

SpinCtrl1 is a local variable, so you can't access it from other methods. Turn it into a member variable.

ahh I see thanks, I got the spinctrl defined but when I use it, the scroll bars do not work im guessing that its an issue with my function that I have made

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void myDoubleSlider::OnSpinCtrl1Change(wxSpinEvent& event)
{
	stepsize = SpinCtrl1.GetValue();
	Update();
	Refresh();
	event.Skip();
}

sorry that this may feel like im spamming, im new to wxwidgets

[doublemax]

Please show real code, these small snippets are not helpful without context.

[bandali99]

https://github.com/fahadbandali/mediaslider

the main files that I am using are myDoubleSlider, and play

its a little messy ive been working all over the play these last couple of weeks

[doublemax]

I managed to build and run it and there are quite a few issues, but regarding the current problem:
myDoubleSlider.h

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wxSpinCtrl SpinCtrl1;

This should be:

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wxSpinCtrl *SpinCtrl1;

myDoubleSlider.cpp

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wxSpinCtrl *SpinCtrl1 = new wxSpinCtrl(...);

should be:

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SpinCtrl1 = new wxSpinCtrl(...);

[bandali99]

thanks!