/* MinTrayBtn Class
* Adds a 'Minimize to tray' Button to the Caption bar of the Form
*
* Created: 15.04.2005
* Updated: 11.07.2005
* Version: 0.8.5
*
* Changes: 11.07.2005 - Variable Caption Button size (adjusts itself to the system metrics)
* - Fixed drawing issues on changes of the window width
*
* 20.05.2005 - added WM_GETTEXT for Drawing Button (Draws the Button after the Text in the Title bar has changed)
*
* Copyright (C) 2005, Tyron Madlener <mytodo@v-cm.net>
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Diagnostics;
using System.Resources;
using System.Runtime.InteropServices;
namespace TyronM {
public delegate void MinTrayBtnClickedEventHandler(object sender, EventArgs e);
/// <summary>
/// Summary description for Class.
/// </summary>
public class MinTrayBtn : NativeWindow {
bool pressed = false;
Size wnd_size = new Size();
public bool captured;
Form parent;
public event MinTrayBtnClickedEventHandler MinTrayBtnClicked;
#region Constants
const int WM_SIZE = 5;
const int WM_SYNCPAINT = 136;
const int WM_MOVE = 3;
const int WM_ACTIVATE = 6;
const int WM_LBUTTONDOWN =513;
const int WM_LBUTTONUP =514;
const int WM_LBUTTONDBLCLK =515;
const int WM_MOUSEMOVE = 512;
const int WM_PAINT = 15;
const int WM_GETTEXT = 13;
const int WM_NCCREATE =129;
const int WM_NCLBUTTONDOWN = 161;
const int WM_NCLBUTTONUP = 162;
const int WM_NCMOUSEMOVE = 160;
const int WM_NCACTIVATE =134;
const int WM_NCPAINT = 133;
const int WM_NCHITTEST = 132;
const int WM_NCLBUTTONDBLCLK = 163;
const int VK_LBUTTON = 1;
const int SM_CXSIZE = 30;
const int SM_CYSIZE = 31;
#endregion
#region WinAPI Imports
[DllImport("user32")]
public static extern int GetWindowDC(int hwnd);
[DllImport("user32")]
public static extern short GetAsyncKeyState(int vKey);
[DllImport("user32")]
public static extern int SetCapture(int hwnd);
[DllImport("user32")]
public static extern bool ReleaseCapture();
[DllImport("user32")]
public static extern int GetSysColor(int nIndex);
[DllImport("user32")]
public static extern int GetSystemMetrics(int nIndex);
#endregion
#region Constructor and Handle-Handler ^^
public MinTrayBtn(Form parent) {
parent.HandleCreated += new EventHandler(this.OnHandleCreated);
parent.HandleDestroyed+= new EventHandler(this.OnHandleDestroyed);
parent.TextChanged+= new EventHandler(this.OnTextChanged);
this.parent = parent;
}
// Listen for the control's window creation and then hook into it.
internal void OnHandleCreated(object sender, EventArgs e){
// Window is now created, assign handle to NativeWindow.
AssignHandle(((Form)sender).Handle);
}
internal void OnHandleDestroyed(object sender, EventArgs e) {
// Window was destroyed, release hook.
ReleaseHandle();
}
// Changing the Text invalidates the Window, so we got to Draw the Button again
private void OnTextChanged(object sender, EventArgs e) {
DrawButton();
}
#endregion
#region WndProc
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]
protected override void WndProc(ref Message m){
//label3.Text = "Button pressed: " + pressed;
//label4.Text = "Mouse captured: " + captured;
// Change the Pressed-State of the Button when the User pressed the
// left mouse button and moves the cursor over the button
if(m.Msg==WM_MOUSEMOVE) {
Point pnt2 = new Point((int)m.LParam);
Size rel_pos2 = new Size(parent.PointToClient(new Point(parent.Location.X, parent.Location.Y)));
// Not needed because SetCapture seems to convert the cordinates anyway
//pnt2 = PointToClient(pnt2);
pnt2-=rel_pos2;
//label2.Text = "Cursor @"+pnt2.X+"/"+pnt2.Y;
if(pressed) {
Point pnt = new Point((int)m.LParam);
Size rel_pos = new Size(parent.PointToClient(new Point(parent.Location.X, parent.Location.Y)));
//pnt = PointToClient(pnt);
pnt-=rel_pos;
if(!MouseinBtn(pnt)) {
pressed = false;
DrawButton();
}
} else {
if((GetAsyncKeyState(VK_LBUTTON)&(-32768))!=0) {
Point pnt = new Point((int)m.LParam);
Size rel_pos = new Size(parent.PointToClient(new Point(parent.Location.X, parent.Location.Y)));
//pnt = PointToClient(pnt);
pnt-=rel_pos;
if(MouseinBtn(pnt)) {
pressed = true;
DrawButton();
}
}
}
}
// Ignore Double-Clicks on the Traybutton
if(m.Msg==WM_NCLBUTTONDBLCLK) {
Point pnt = new Point((int)m.LParam);
Size rel_pos = new Size(parent.PointToClient(new Point(parent.Location.X, parent.Location.Y)));
pnt = parent.PointToClient(pnt);
pnt-=rel_pos;
if(MouseinBtn(pnt)) {
return;
}
}
// Button released and eventually clicked
if(m.Msg==WM_LBUTTONUP) {
ReleaseCapture();
captured = false;
if(pressed) {
pressed = false;
DrawButton();
Point pnt = new Point((int)m.LParam);
Size rel_pos = new Size(parent.PointToClient(new Point(parent.Location.X, parent.Location.Y)));
pnt-=rel_pos;
if(MouseinBtn(pnt)) {
//TrayButton_clicked();
EventArgs e = new EventArgs();
if (MinTrayBtnClicked != null)
MinTrayBtnClicked(this, e);
return;
}
}
}
// Clicking the Button - Capture the Mouse and await until the Uses relases the Button again
if(m.Msg==WM_NCLBUTTONDOWN) {
Point pnt = new Point((int)m.LParam);
Size rel_pos = new Size(parent.PointToClient(new Point(parent.Location.X, parent.Location.Y)));
pnt = parent.PointToClient(pnt);
pnt-=rel_pos;
if(MouseinBtn(pnt)) {
pressed = true;
DrawButton();
SetCapture((int)parent.Handle);
captured = true;
return;
}
}
// Drawing the Button and getting the Real Size of the Window
if(m.Msg == WM_ACTIVATE || m.Msg==WM_SIZE || m.Msg==WM_SYNCPAINT || m.Msg==WM_NCACTIVATE || m.Msg==WM_NCCREATE || m.Msg==WM_NCPAINT || m.Msg==WM_NCACTIVATE || m.Msg==WM_NCHITTEST || m.Msg==WM_PAINT) {
if(m.Msg==WM_SIZE) wnd_size = new Size(new Point((int)m.LParam));
DrawButton();
}
base.WndProc(ref m);
}
#endregion
#region Button-Specific Functions
public bool MouseinBtn(Point click) {
int btn_width = GetSystemMetrics(SM_CXSIZE);
int btn_height = GetSystemMetrics(SM_CYSIZE);
Size btn_size = new Size(btn_width, btn_height);
Point pos = new Point(wnd_size.Width-3*btn_width-12-(btn_width-18),6);
return click.X>=pos.X && click.X<=pos.X+btn_size.Width &&
click.Y>=pos.Y && click.Y<=pos.Y+btn_size.Height;
}
public void DrawButton() {
Graphics g = Graphics.FromHdc((IntPtr)GetWindowDC((int)parent.Handle)); //m.HWnd));
DrawButton(g, pressed);
}
public void DrawButton(Graphics g, bool pressed) {
int btn_width = GetSystemMetrics(SM_CXSIZE);
int btn_height = GetSystemMetrics(SM_CYSIZE);
Point pos = new Point(wnd_size.Width-3*btn_width-12-(btn_width-18),6);
// real button size
btn_width-=2;
btn_height-=4;
Color light = SystemColors.ControlLightLight;
Color icon = SystemColors.ControlText;
Color background = SystemColors.Control;
Color shadow1 = SystemColors.ControlDark;
Color shadow2 = SystemColors.ControlDarkDark;
Color tmp1, tmp2;
if(pressed) {
tmp1 = shadow2;
tmp2 = light;
} else {
tmp1 = light;
tmp2 = shadow2;
}
g.DrawLine(new Pen(tmp1),pos, new Point(pos.X+btn_width-1,pos.Y));
g.DrawLine(new Pen(tmp1),pos, new Point(pos.X,pos.Y+btn_height-1));
if(pressed) {
g.DrawLine(new Pen(shadow1),pos.X+1, pos.Y+1, pos.X+btn_width-2, pos.Y+1);
g.DrawLine(new Pen(shadow1),pos.X+1, pos.Y+1, pos.X+1, pos.Y+btn_height-2);
} else {
g.DrawLine(new Pen(shadow1),pos.X+btn_width-2, pos.Y+1, pos.X+btn_width-2, pos.Y+btn_height-2);
g.DrawLine(new Pen(shadow1),pos.X+1, pos.Y+btn_height-2, pos.X+btn_width-2, pos.Y+btn_height-2);
}
g.DrawLine(new Pen(tmp2),pos.X+btn_width-1, pos.Y+0, pos.X+btn_width-1, pos.Y+btn_height-1);
g.DrawLine(new Pen(tmp2),pos.X+0, pos.Y+btn_height-1, pos.X+btn_width-1, pos.Y+btn_height-1);
g.FillRectangle(new SolidBrush(background),pos.X+1+Convert.ToInt32(pressed), pos.Y+1+Convert.ToInt32(pressed), btn_width-3,btn_height-3);
g.FillRectangle(new SolidBrush(icon),pos.X+(float)0.5625*btn_width+Convert.ToInt32(pressed),pos.Y+(float)0.6428*btn_height+Convert.ToInt32(pressed),btn_width*(float)0.1875,btn_height*(float)0.143);
}
#endregion
}
}