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LCDDisplay.cs
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LCDDisplay.cs
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using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Xml;
namespace LCD.Emulator
{
public class LCDDisplay : Form
{
private delegate void Action();
private const int LINE_LEN = 40;
private readonly LCDChip chip;
private byte backlight = 0xFF, contrast = 0xFF / 2;
private readonly Color background, foreground;
private readonly SolidBrush fgBrush;
private readonly Pen borderTopPen, borderLeftPen;
private readonly CGROM cgrom;
private readonly Size size, pixelSize, charSize, gapSize, borderSize, charFullSize, charFullPixelSize, tlOffset;
private readonly Rectangle character;
private bool display = true, cursor = true;
private int cursor_pos = 0;
private readonly byte[] text = new byte[4 * LINE_LEN];
private Timer blinker = new Timer();
private bool blink_on = false;
private static Size ReadSize(string sz)
{
int x = sz.IndexOf("x");
if (x < 0)
{
int n = Convert.ToInt32(sz);
return new Size(n, n);
}
else
{
return new Size(Convert.ToInt32(sz.Substring(0, x)), Convert.ToInt32(sz.Substring(x + 1)));
}
}
public LCDDisplay(XmlNode settings, LCDChip chip)
{
this.chip = chip;
this.InitializeComponent();
try { this.Icon = Icon.ExtractAssociatedIcon(System.Reflection.Assembly.GetExecutingAssembly().Location); }
catch (Exception) { }
this.background = ColorTranslator.FromHtml(settings["Background"].InnerText);
this.foreground = ColorTranslator.FromHtml(settings["Foreground"].InnerText);
this.fgBrush = new SolidBrush(this.foreground);
this.cgrom = new CGROM(settings["CGROM"].InnerText);
this.size = ReadSize(settings["Size"].InnerText);
this.charSize = ReadSize(settings["CharacterSize"].InnerText);
this.gapSize = ReadSize(settings["GapSize"].InnerText);
this.pixelSize = ReadSize(settings["PixelSize"].InnerText);
this.borderSize = ReadSize(settings["BorderSize"].InnerText);
this.charFullSize = new Size(this.charSize.Width + this.gapSize.Width, this.charSize.Height + this.gapSize.Height);
this.charFullPixelSize = new Size(this.charFullSize.Width * this.pixelSize.Width, this.charFullSize.Height * this.pixelSize.Height);
this.tlOffset = new Size(this.gapSize.Width * this.pixelSize.Width + borderSize.Width, this.gapSize.Height * this.pixelSize.Height + borderSize.Height);
this.character = new Rectangle(0, 0, this.charSize.Width, this.charSize.Height);
this.borderTopPen = new Pen(this.fgBrush, this.borderSize.Height);
this.borderLeftPen = new Pen(this.fgBrush, this.borderSize.Width );
this.Size = new Size(
this.size.Width * this.charFullPixelSize.Width + this.tlOffset.Width + borderSize.Width,
this.size.Height * this.charFullPixelSize.Height + this.tlOffset.Height + borderSize.Height
);
this.MaximumSize = this.Size;
this.MinimumSize = this.Size;
this.blinker.Enabled = true;
this.blinker.Interval = 400;
this.blinker.Tick += this.BlinkIt;
this.Clear();
this.UpdateColors();
}
private void InitializeComponent()
{
ContextMenuStrip menu = new ContextMenuStrip();
menu.SuspendLayout();
menu.Items.AddRange(new ToolStripItem[]{
new ToolStripMenuItem("Button 1", null,
new ToolStripMenuItem("Click", null, delegate(object s, EventArgs e) { this.chip.ButtonClick(0); }),
new ToolStripMenuItem("Down", null, delegate(object s, EventArgs e) { this.chip.ButtonDown (0); }),
new ToolStripMenuItem("Up", null, delegate(object s, EventArgs e) { this.chip.ButtonUp (0); })
),
new ToolStripMenuItem("Button 2", null,
new ToolStripMenuItem("Click", null, delegate(object s, EventArgs e) { this.chip.ButtonClick(1); }),
new ToolStripMenuItem("Down", null, delegate(object s, EventArgs e) { this.chip.ButtonDown (1); }),
new ToolStripMenuItem("Up", null, delegate(object s, EventArgs e) { this.chip.ButtonUp (1); })
),
new ToolStripMenuItem("Button 3", null,
new ToolStripMenuItem("Click", null, delegate(object s, EventArgs e) { this.chip.ButtonClick(2); }),
new ToolStripMenuItem("Down", null, delegate(object s, EventArgs e) { this.chip.ButtonDown (2); }),
new ToolStripMenuItem("Up", null, delegate(object s, EventArgs e) { this.chip.ButtonUp (2); })
),
new ToolStripMenuItem("Button 4", null,
new ToolStripMenuItem("Click", null, delegate(object s, EventArgs e) { this.chip.ButtonClick(3); }),
new ToolStripMenuItem("Down", null, delegate(object s, EventArgs e) { this.chip.ButtonDown (3); }),
new ToolStripMenuItem("Up", null, delegate(object s, EventArgs e) { this.chip.ButtonUp (3); })
),
new ToolStripMenuItem("Button 5", null,
new ToolStripMenuItem("Click", null, delegate(object s, EventArgs e) { this.chip.ButtonClick(4); }),
new ToolStripMenuItem("Down", null, delegate(object s, EventArgs e) { this.chip.ButtonDown (4); }),
new ToolStripMenuItem("Up", null, delegate(object s, EventArgs e) { this.chip.ButtonUp (4); })
),
new ToolStripMenuItem("Exit", null, this.exit),
});
menu.ResumeLayout(false);
this.SuspendLayout();
this.ContextMenuStrip = menu;
this.FormBorderStyle = FormBorderStyle.None;
this.ShowInTaskbar = false;
this.DoubleBuffered = true;
this.Text = "LCD Display";
this.ResumeLayout(false);
}
private void exit(object sender, EventArgs e)
{
if (this.InvokeRequired)
this.Invoke(new Action(this.Close));
else
this.Close();
}
private void SetBlinker(bool Enabled)
{
if (this.InvokeRequired)
this.Invoke(new Action<bool>(this.SetBlinker), Enabled);
else
{
this.blinker.Enabled = Enabled;
this.blink_on = true;
this.InvalidateCurCharacter();
}
}
private void BlinkIt(object sender, EventArgs e)
{
this.blink_on = !this.blink_on;
this.InvalidateCurCharacter();
}
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HTCAPTION = 0x2;
[DllImport("user32")] public static extern bool ReleaseCapture();
[DllImport("user32")] public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
protected override void OnMouseDown(MouseEventArgs e) { if (e.Button == MouseButtons.Left) { ReleaseCapture(); SendMessage(Handle, WM_NCLBUTTONDOWN, HTCAPTION, 0); } base.OnMouseDown(e); }
private void DrawCharacter(Graphics g, int x, int y, byte c)
{
g.FillRegion(this.fgBrush, this.cgrom[c].TranslatedAndClipped(x * this.charFullSize.Width, y * this.charFullSize.Height, this.character));
}
private void DrawUnderline(Graphics g, int x, int y)
{
g.FillRectangle(this.fgBrush, x * this.charFullSize.Width, y * this.charFullSize.Height + 8, this.charSize.Width, 1);
}
private void DrawBox(Graphics g, int x, int y)
{
g.FillRectangle(this.fgBrush, x * this.charFullSize.Width, y * this.charFullSize.Height, this.charSize.Width, this.charSize.Height);
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
Graphics g = e.Graphics;
g.InterpolationMode = InterpolationMode.NearestNeighbor;
g.Clear(this.BackColor);
float w = this.Size.Width, h = this.Size.Height, lh = this.borderSize.Height / 2f, lw = this.borderSize.Width / 2f;
g.DrawLine(this.borderTopPen, 0, lh, w, lh ); // top
g.DrawLine(this.borderTopPen, 0, h - lh, w, h - lh); // bottom
g.DrawLine(this.borderLeftPen, lw, 0, lw, h); // left
g.DrawLine(this.borderLeftPen, w - lw, 0, w - lw, h); // right
if (this.display)
{
bool blink_off = this.blinker.Enabled && !this.blink_on;
g.TranslateTransform(this.tlOffset.Width, this.tlOffset.Height);
g.ScaleTransform(this.pixelSize.Width, this.pixelSize.Height);
for (int i = 0; i < this.text.Length; ++i)
if (i != cursor_pos || !blink_off)
DrawCharacter(g, i % LINE_LEN, i / LINE_LEN, (byte)this.text[i]);
if (this.cursor && !blink_off) DrawUnderline(g, this.cursor_pos % LINE_LEN, this.cursor_pos / LINE_LEN);
//if (this.blinker.Enabled && this.blink_on) DrawBox(g, this.cursor_pos % LINE_LEN, this.cursor_pos / LINE_LEN);
}
}
private void InvalidateCurCharacter()
{
if (this.InvokeRequired)
this.Invoke(new Action(this.InvalidateCurCharacter));
else
this.Invalidate(new Rectangle(
(this.cursor_pos % LINE_LEN) * this.charFullPixelSize.Width + this.tlOffset.Width,
(this.cursor_pos / LINE_LEN) * this.charFullPixelSize.Height + this.tlOffset.Height,
this.charFullPixelSize.Width, this.charFullPixelSize.Height));
}
private void InvalidateAll()
{
if (this.InvokeRequired)
this.Invoke(new Action(this.Invalidate));
else
this.Invalidate();
}
private void Goto(int c_pos)
{
if (this.InvokeRequired)
this.Invoke(new Action<int>(this.Goto), c_pos);
else
{
this.InvalidateCurCharacter();
this.cursor_pos = c_pos % this.text.Length;
this.InvalidateCurCharacter();
}
}
private int ApplyBacklight(byte c) { return c * this.backlight / 255; }
private Color ApplyBacklight(Color c) { return Color.FromArgb(ApplyBacklight(c.R), ApplyBacklight(c.G), ApplyBacklight(c.B)); }
private static int Mix(byte a, byte b, byte amount) { return a * (255 - amount) / 255 + b * amount / 255; } // amount == 0 => all a, amount == 255 => all b
private static Color Mix(Color a, Color b, byte amount) { return Color.FromArgb(Mix(a.R, b.R, amount), Mix(a.G, b.G, amount), Mix(a.B, b.B, amount)); }
private void UpdateColors()
{
if (this.InvokeRequired)
this.Invoke(new Action(this.UpdateColors));
else
{
this.BackColor = this.ApplyBacklight(this.background);
this.ForeColor = this.ApplyBacklight(this.foreground);
if (this.contrast <= 127) { this.ForeColor = Mix(this.ForeColor, this.BackColor, (byte)((127 - this.contrast) * 2)); } // this.contrast == 0 => entirely this.BackColor
if (this.contrast >= 128) { this.BackColor = Mix(this.BackColor, this.ForeColor, (byte)((this.contrast - 128) * 2)); } // this.contrast == 255 => entirely this.ForeColor
this.fgBrush.Color = this.ForeColor;
this.Invalidate();
}
}
public void Write(byte c) { this.text[this.cursor_pos] = c; this.CursorRight(); }
public void Write(byte[] c) { this.Write(c, 0, c.Length); }
public void Write(byte[] c, int off, int len)
{
while (len > 0)
{
int avail = LINE_LEN - this.cursor_pos % LINE_LEN, copy = Math.Min(avail, len);
Array.Copy(c, off, this.text, this.cursor_pos, copy);
off += copy; len -= copy; this.cursor_pos += copy - 1;
this.CursorRight();
this.InvalidateAll();
}
}
public void Clear() { for (int i = 0; i < this.text.Length; ++i) { this.text[i] = (byte)' '; } this.InvalidateAll(); }
public void Home() { this.Goto(0); }
public bool Display { get { return this.display; } set { this.display = value; this.InvalidateAll(); } }
public bool Blink { get { return this.blinker.Enabled; } set { /*this.blinker.Enabled = value;*/ this.SetBlinker(value); } }
public bool ShowCursor { get { return this.cursor; } set { this.cursor = value; this.InvalidateCurCharacter(); } }
public void Goto(byte col, byte row) { this.Goto(LINE_LEN * (row - 1) + (col - 1)); }
public void CursorLeft() { this.Goto(this.cursor_pos - 1); }
public void CursorRight() { this.Goto(this.cursor_pos + 1); }
public byte Contrast { get { return this.contrast; } set { this.contrast = value; this.UpdateColors(); } }
public byte Backlight { get { return this.backlight; } set { this.backlight = value; this.UpdateColors(); } }
public byte[] GetCustomChar(int i) { return this.cgrom.GetCustomChar(i); }
public void SetCustomChar(int i, byte[] b) { this.cgrom.SetCustomChar(i, b); this.InvalidateAll(); }
public byte[] CompleteContent { get { return (byte[])this.text.Clone(); } set { Array.Copy(value, this.text, value.Length); this.InvalidateAll(); } }
}
}