Click here to Skip to main content
Click here to Skip to main content

C# Rect Tracker

, 16 Nov 2004
Rate this:
Please Sign up or sign in to vote.
C# Rect Tracker (like CRectTracker on C++).

Sample image

Introduction

Ever tried to find that object that allows Visual studio to move and resize controls? Well, I didn't find it in C# but in C++. Well, here it is in C# Smile | :)

Background

The project I was working on required me to create forms in run-time, so I needed something to edit controls - RectTracker.

In C++ there is an object called CRectTracker, but in C# there isn't, so I tried to clone it, it doesn't do what the Visual Studio Tracker does, but it does the job on resizing and moving controls on a form.

Methodology

It's made of a UserControl because doing it using the form graphics object creates ordering problems (a control is "above" the tracker), so making it a control itself, allows me to play with Z-Order and set the control to front.

I used Region Transparenting to create a place for the Control I want to move/resize.

Using The Code

    
SomeControl.BringToFront();
SomeControl.Capture = false;
if(this.Controls.Contains(CSharpTracker))
  this.Controls.Remove(CSharpTracker);
CSharpTracker = new RectTracker(SomeControl);

this.Controls.Add(CSharpTracker);
CSharpTracker.BringToFront();
CSharpTracker.Draw();
    

Control Moving

public void Mouse_Move(object sender,System.Windows.Forms.MouseEventArgs e)
    {
//minimum size for the control is 8x8
if (currentControl.Height < 8)
{
  currentControl.Height = 8;
  return;
}
else if (currentControl.Width < 8)
{
  currentControl.Width = 8;
  return;
}
    
switch(this.CurrBorder)
{
  case RESIZE_BORDER.RB_TOP:
    currentControl.Height = currentControl.Height - e.Y + prevLeftClick.Y;
    if (currentControl.Height > 8)
    currentControl.Top = currentControl.Top + e.Y - prevLeftClick.Y;    
    break;
  case RESIZE_BORDER.RB_TOPLEFT:
    currentControl.Height = currentControl.Height - e.Y + prevLeftClick.Y;
    if (currentControl.Height > 8)
    currentControl.Top =currentControl.Top + e.Y - prevLeftClick.Y;
    currentControl.Width = currentControl.Width - e.X + prevLeftClick.X;
    if (currentControl.Width > 8)
    currentControl.Left =currentControl.Left + e.X - prevLeftClick.X;
    break;
  case RESIZE_BORDER.RB_TOPRIGHT:
    currentControl.Height = currentControl.Height - e.Y + prevLeftClick.Y;
    if (currentControl.Height > 8)
    currentControl.Top = currentControl.Top + e.Y - prevLeftClick.Y;
    currentControl.Width = currentControl.Width + e.X - prevLeftClick.X;
    break;
  case RESIZE_BORDER.RB_RIGHT:
    currentControl.Width = currentControl.Width + e.X - prevLeftClick.X;
    break;
  case RESIZE_BORDER.RB_BOTTOM:
    currentControl.Height = currentControl.Height + e.Y - prevLeftClick.Y;
    break;
  case RESIZE_BORDER.RB_BOTTOMLEFT:
    currentControl.Height = currentControl.Height + e.Y - prevLeftClick.Y;
    currentControl.Width = currentControl.Width - e.X + prevLeftClick.X;
    if (currentControl.Width > 8)
currentControl.Left = currentControl.Left + e.X - prevLeftClick.X;
    break;
  case RESIZE_BORDER.RB_BOTTOMRIGHT:
    currentControl.Height = currentControl.Height + e.Y - prevLeftClick.Y;
    currentControl.Width = currentControl.Width + e.X - prevLeftClick.X;
    break;
  case RESIZE_BORDER.RB_LEFT:
    currentControl.Width = currentControl.Width - e.X + prevLeftClick.X;
    if (currentControl.Width > 8)
    currentControl.Left = currentControl.Left + e.X - prevLeftClick.X;
    break;
  case RESIZE_BORDER.RB_NONE:
    currentControl.Location = new Point(currentControl.Location.X + e.X - 
    prevLeftClick.X, currentControl.Location.Y + e.Y - prevLeftClick.Y);
    break;
  
}

}
    

Conclusion

This SharpRectTracker control is a clone of the CRectTracker, and it allows a user to Move and Resize form objects (control) in run-time, this control can be further enhanced to allow multiple object move/resize (using selection) and to do selectable Resize (for an object that only the width can be changed).

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

About the Author

nashcontrol
Web Developer
Israel Israel
No Biography provided
Follow on   Twitter

Comments and Discussions

 
Questionhow to select multiple objects PinmemberTrushnaK19-Nov-13 19:43 
QuestionResize PinmemberSPX8717-Jun-13 6:15 
Questionnot working the project. Pinmemberjishadshajahan3-Apr-13 0:36 
GeneralMore Functionality For Rect Tracker PinmemberDerek Hart12-Jan-08 13:41 
QuestionHow to make a perspective PinmemberEl Tucu17-Sep-06 15:52 
GeneralScrollbars Pinmemberzulfi_k10-Mar-06 5:19 
GeneralRe: Scrollbars Pinmembernashcontrol11-Mar-06 5:59 
GeneralRe: Scrollbars Pinmemberzulfi_k13-Mar-06 4:23 
GeneralRe: Scrollbars [modified] PinmemberPugwash200412-Jun-06 1:54 
GeneralVery Helpful Pinmemberkmerrell25-Feb-06 13:53 
Generalthank you! Pinmembernashcontrol9-Mar-06 10:19 
GeneralWorking with forms PinmemberrleonardiBR29-Apr-05 8:02 
GeneralI doubt it can do it Pinmembernashcontrol6-May-05 4:03 
GeneralSelect several controls PinmemberAlexander_Vikhorev7-Mar-05 7:07 
GeneralRe: Select several controls PinmemberAlexander_Vikhorev7-Mar-05 7:09 
GeneralRe: Select several controls Pinmembernashcontrol11-Mar-05 0:04 
GeneralListBox Pinmembervillander22-Dec-04 8:00 
GeneralRe: ListBox Pinmembernashcontrol11-Mar-05 0:57 
GeneralRectTracker improvements Pinmemberklaus3b7-Dec-04 2:41 
Generalgreat!, thanks Pinmembernashcontrol10-Mar-05 22:06 
GeneralDesigner PinmemberGaston23-Nov-04 0:20 
GeneralRe: Designer PinmemberTesto28ß515-Oct-06 7:43 
GeneralNice Work, But... PinmemberAju.George10-Nov-04 3:09 
GeneralRe: Nice Work, But... Pinmembernashcontrol10-Nov-04 4:17 
Generalabout the link you gave Pinmembernashcontrol10-Nov-04 4:31 
Generaldoh: PinsussAnonymous10-Nov-04 0:42 
GeneralDataGrid PinmemberGary Thom9-Nov-04 23:32 
GeneralYes Pinmembernashcontrol9-Nov-04 23:59 
GeneralRe: Yes PinmemberGary Thom10-Nov-04 12:54 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web02 | 2.8.140721.1 | Last Updated 16 Nov 2004
Article Copyright 2004 by nashcontrol
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid