Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//=============================================================================//
#include "DemoPage.h"
#include <VGUI/IVGui.h>
#include <vgui/IScheme.h>
#include <vgui_controls/ScrollBar.h>
#include <vgui_controls/Label.h>
#include <stdio.h>
using namespace vgui;
//-----------------------------------------------------------------------------
// A ScrollBar is an class for selecting a numerical value from a range.
// E.g. in the case of a scrolling text window we use the scroll bar to select
// what line/char of text display should start at in the text window.
// Some terms:
//
// There are arrow buttons on either end of the scroll bar.
// These move the scroll bar 'slider' or 'nob' across the space between the arrows.
// The nob moves over a user specified 'range' of numbers.
//
// ----------------------------------------------------
// | / |..............| |................ | \ |
// | \ |..............| nob |.................| / |
// ----------------------------------------------------
//
// In this demo we create a vertical scroll bar that is not attached to anything.
// We display the current value of the slider nob next to the scroll bar.
//-----------------------------------------------------------------------------
class ScrollBarDemo: public DemoPage
{
public:
ScrollBarDemo(Panel *parent, const char *name);
~ScrollBarDemo();
void OnSliderMoved();
private:
ScrollBar *m_pScrollbar;
Label *m_pScrollValue;
DECLARE_PANELMAP();
};
//-----------------------------------------------------------------------------
// Purpose: Constructor
//-----------------------------------------------------------------------------
ScrollBarDemo::ScrollBarDemo(Panel *parent, const char *name) : DemoPage(parent, name)
{
// A vertical slider
m_pScrollbar = new ScrollBar (this, "ASscrollbar", true);
// Set the position of the bar
m_pScrollbar->SetPos(100, 100);
// Set the size of the bar
m_pScrollbar->SetSize (20, 200);
// Set the size of the bar nob, which is actually proportionally
// related to how many lines of info fit into the window the
// scroll bar is attatched to vs how many total lines there are.
// With a size of 10, the scroll bar value will pass from 0 to 100.
m_pScrollbar->SetRangeWindow(10);
// Set the range of the bar,
// We want our range displayed to go from 0 to 100.
// We must take size of the bar nob into account, and set the max to 110.
m_pScrollbar->SetRange(0, 110);
// Set how far the scroll bar slider moves
// when a scroll bar arrow button is pressed
m_pScrollbar->SetButtonPressedScrollValue(5);
// Set the starting value of the bar nob.
// This will put the nob at the top of the vertical scroll bar.
m_pScrollbar->SetValue(0);
// Finally we create a little label to tell us what the current value
// of the scroll bar is.
// We will update it every time the slider is moved.
m_pScrollValue = new Label (this, "ScrollBarValue", "0");
// Stick the label next to the scroll bar.
m_pScrollValue->SetPos(130, 100);
}
//-----------------------------------------------------------------------------
// Purpose: Destructor
//-----------------------------------------------------------------------------
ScrollBarDemo::~ScrollBarDemo()
{
}
//-----------------------------------------------------------------------------
// Purpose: Respond to movement of the scroll bar nob by updating the label's
// text with the current value of the scrollbar.
//-----------------------------------------------------------------------------
void ScrollBarDemo::OnSliderMoved()
{
char number[6];
sprintf (number, "%d", m_pScrollbar->GetValue());
m_pScrollValue->SetText(number);
}
//-----------------------------------------------------------------------------
// Purpose: Message map
//-----------------------------------------------------------------------------
MessageMapItem_t ScrollBarDemo::m_MessageMap[] =
{
MAP_MESSAGE( ScrollBarDemo, "ScrollBarSliderMoved", OnSliderMoved ),
};
IMPLEMENT_PANELMAP(ScrollBarDemo, Panel);
Panel* ScrollBarDemo_Create(Panel *parent)
{
return new ScrollBarDemo(parent, "ScrollBarDemo");
}