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utils/vgui_panel_zoo/TextEntryDemo4.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+#include "DemoPage.h"
+
+#include <VGUI/IVGui.h>
+
+#include <vgui_controls/TextEntry.h>
+#include <vgui/ISystem.h>
+#include <vgui_controls/Controls.h>
+#include <stdio.h>
+
+using namespace vgui;
+
+static const int TIMEOUT = 1000; // 1 second timeout
+
+//-----------------------------------------------------------------------------
+// Text Entry controls are notepad-like windows that hold text. 
+// In this demo we create a NON-editable text entry window that holds multiple lines
+// of text. We initialize it with some starting text and add a scroll bar to the 
+// window.
+// Then we use a tick function to add some more text to the window every one second.
+// As the window fills with text, the window scrolls vertically. 
+// The scroll bar will appear after a few lines and the scroll bar
+// slider will shrink as even more text is added.
+//-----------------------------------------------------------------------------
+class TextEntryDemo4: public DemoPage
+{
+	public:
+		TextEntryDemo4(Panel *parent, const char *name);
+		~TextEntryDemo4();
+
+		void SetVisible(bool state);
+		void OnTick();
+		
+	private:
+		TextEntry *m_pTextEntry;
+		int m_iTimeoutTime;
+
+};
+
+//-----------------------------------------------------------------------------
+// Purpose: Constructor
+//-----------------------------------------------------------------------------
+TextEntryDemo4::TextEntryDemo4(Panel *parent, const char *name) : DemoPage(parent, name)
+{
+	m_pTextEntry = new TextEntry(this, "FancyTextEntry");
+
+	// Position the window and make it nice and wide.
+	// Make it tall enough to fit several lines of text.
+	m_pTextEntry->SetBounds(100, 100, 400, 200);
+	
+
+	// Make this window hold multiple lines of text.
+	// This will turn off horizontal scrolling, 
+	// and wrap text from line to line.
+	m_pTextEntry->SetMultiline(true);
+
+	// Add a vertical scroll bar.
+	m_pTextEntry->SetVerticalScrollbar(true);
+	
+	// Insert text after you have set the size and position of the window
+	m_pTextEntry->InsertString("Some starting text and a pile of text. ");
+	m_pTextEntry->InsertString("Some more text to make mutiple lines. ");
+	m_pTextEntry->InsertString("Even more scrumptious, chocolatey delicious text. ");
+	m_pTextEntry->InsertString("Enough text to get that scroll bar a-scrolling. ");
+	m_pTextEntry->InsertString("That's it a nice number of chars.\n");
+
+	// This Text window is not editable by the user. It will only display.
+	m_pTextEntry->SetEditable(false);
+	
+	// This makes panel receive a 'Tick' message every frame 
+	// (~50ms, depending on sleep times/framerate)
+	// Panel is automatically removed from tick signal list when it's deleted
+	ivgui()->AddTickSignal(this->GetVPanel());
+
+	m_iTimeoutTime = 0;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Destructor
+//-----------------------------------------------------------------------------
+TextEntryDemo4::~TextEntryDemo4()
+{
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: When the page is shown, initialize the time
+//-----------------------------------------------------------------------------
+void TextEntryDemo4::SetVisible(bool state)
+{
+	if (state)
+	{
+		// Set the timeout time.
+		m_iTimeoutTime = system()->GetTimeMillis() + TIMEOUT;
+
+	}
+	DemoPage::SetVisible(state);
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Adds lines to the text entry every second.
+//-----------------------------------------------------------------------------
+void TextEntryDemo4::OnTick()
+{
+	if (m_iTimeoutTime)
+	{
+		int currentTime = system()->GetTimeMillis();
+		
+		// Check for timeout
+		if (currentTime > m_iTimeoutTime)
+		{	
+			char buf[125];
+			sprintf (buf, "Additional Text %d\n", m_iTimeoutTime);
+
+			// Move to the end of the history before we add some new text.
+			// Its important to call this and explicitly move to the
+			// correct position in case someone clicked in
+			// the window (this moves the cursor)
+			// If you comment out this line and rerun you will see
+			// that if you click in the text window additional
+			// text will be added where you clicked.
+			m_pTextEntry->GotoTextEnd();
+
+			// Add some text to the text entry window
+			m_pTextEntry->InsertString(buf);
+
+			// Timed out, make a new timeout time
+			m_iTimeoutTime = system()->GetTimeMillis() + TIMEOUT;
+		}
+	}
+}
+
+
+
+Panel* TextEntryDemo4_Create(Panel *parent)
+{
+	return new TextEntryDemo4(parent, "TextEntryDemo4");
+}
+
+