This document discusses switching between forms in a C++.NET Windows Forms application. It provides steps to include a second form header in the first form, instantiate the second form, and switch to it by calling its Show() method. It also describes how to pass a reference to the first form to the second form so it can switch back by updating properties of the first form. Additional controls like labels, textboxes, trackbars and progressbars are described along with common properties and events. NumericUpDown and parsing string values to integers is also covered.

1. C++.NET
Windows Forms Course
L03 – Controls Part 2
Mohammad Shaker
mohammadshakergtr.wordpress.com
C++.NET Windows Forms Course
@ZGTRShaker

2. Switching Between Forms

3. It’s another form..

4. Switching between forms

5. Switching to a another forms
• Let’s consider that we want to have two forms and we want
to switch between them
– #1: First of all we add a new “second” form to out project
• Add > new item > form
– #2: include its header in first form header file
– ( “Form1.h” file )
#include "Form2.h"
– #3: pointing to the other form
Form2 ^f= gcnew Form2;
– #4: and start playing with it :D
f->Show();

6. Switching Back to Form1
• In “Form2.h”
namespace MyTestPro {
ref class Form1;
public: Form1 ^FPtr;
Form2(Form1 ^f)
{
InitializeComponent();
FPtr= f;
}

7. Switching Back to Form1
• In “Form2.cpp”
#include "StdAfx.h"
#include "Form2.h"
#include "Form1.h”
namespace MyTestPro {
System::Void Form2::Form2_Load(System::Object^
System::EventArgs^ e)
{
FPtr->Text= “New Form1 Text!";
}
}
sender,

8. Peak on Drawing Class
Point & Size

9. Peak on Drawing::Point
• What will happen now?
private: System::Void button1_Click(System::Object^
sender, System::EventArgs^ e)
{
button1->Location= 30,120;
}

10. Peak on Drawing::Point

11. Peak on Drawing::Point
• What will happen now?
private: System::Void button1_Click(System::Object^
System::EventArgs^ e)
{
Drawing::Point P;
P.X= 2;
P.Y= 23;
button1->Location= P;
}
sender,

12. Drawing::Point

13. Helpers

14. Helpers
So, what should
we do?

15. Point and Size
• Can we do this? Yes!
private: System::Void button1_Click_1(System::Object^
System::EventArgs^ e)
{
Drawing::Size S;
S.Height= 200;
S.Width= 300;
this->Size= S;
}
sender,

16. Point and Size
• Can we do this?
private: System::Void button1_Click_1(System::Object^
System::EventArgs^ e)
{
Drawing::Size ^S;
S->Height= 200;
S->Width= 300;
this->Size= S;
}
sender,
Compile error
Error
1
error C2664: 'void
System::Windows::Forms::Control::Size::set(System::Drawing::Size)':
cannot convert parameter 1 from 'System::Drawing::Size ^' to
'System::Drawing::Size'
c:userszgtrdocumentsvisual studio
2008projectsdotnet4dotnet4Form1.h 129
dotNet4

17. Helpers

18. Point and Size
private: System::Void button1_Click_1(System::Object^
sender, System::EventArgs^ e)
{
this->Size= Drawing::Size(200,300);
}
Works!

19. Helpers

20. Point and Size

21. Label

22. Label
• Properties:
Name, Text, Font, image, Location, Size, TabStop, TabIndex,
Visible, BackColor
• Event:
MouseClick, MouseDown, MouseLeave, Resize, SizeChange,
TextChanged, VisibleChanged, KeyUp, KeyDown, DragDrop

23. TextBox

24. TextBox
• Properties:
Name, Text, Font, image, Location, Size, TabStop, TabIndex,
Visible, BackColor, MultiLine, ScrollBar
• Event:
MouseClick, MouseDown, MouseLeave, Resize, SizeChange,
TextChanged, VisibleChanged, KeyUp, KeyDown, DragDrop

25. Panel

26. Panel
• Properties:
Name, Text, Font, image, Location, Size, TabStop, TabIndex,
Visible, BackColor, Border Style, AutoSize
• Event:
MouseClick, MouseDown, MouseLeave, Resize, SizeChange,
TextChanged, VisibleChanged, KeyUp, KeyDown, DragDrop

27. TrackBar

28. TrackBar

29. TrackBar

30. TrackBar
Keyboard keys (Arrows)
Number of ticks between tick
marks
position

31. TrackBar
• What will happen now?
private: System::Void trackBar1_Scroll(System::Object^
System::EventArgs^ e)
{
textBox1->Text= trackBar1->Value.ToString();
}
sender,

32. TrackBar

33. ProgressBar

34. ProgressBar

35. ProgressBar

36. ProgressBar

37. ProgressBar
• Increment the progressBar and perform the “performStep()”
• What will happen when pressing the button?
private: System::Void button1_Click_4(System::Object^
System::EventArgs^ e)
{
progressBar1->PerformStep();
}
sender,

38. ProgressBar
• What will happen now when pressing the button, repeatedly?
private: System::Void button1_Click_4(System::Object^ sender,
System::EventArgs^ e)
{
progressBar1->PerformStep();
textBox1->Text= progressBar1->Value.ToString();
}

39. ProgressBar
Before clicking button1
After clicking button1 for 1st time
After clicking button1 for 2nd time

40. ProgressBar
• Another example:
– The following code example uses a ProgressBar control to display the
progress of a file copy operation. The example uses
the Minimum and Maximum properties to specify a range for
the ProgressBar that is equivalent to the number of files to copy. The
code also uses the Step property with the PerformStep method to
increment the value of theProgressBar as a file is copied. This example
requires that you have a ProgressBar control created called pBar1 that
is created within a Form and that there is a method created
called CopyFile (that returns a Boolean value indicating the file copy
operation was completed successfully) that performs the file copy
operation. The code also requires that an array of strings containing
the files to copy is created and passed to
the CopyWithProgress method defined in the example and that the
method is called from another method or event in the Form.

41. private:
void CopyWithProgress( array<String^>^filenames )
{
// Display the ProgressBar control.
pBar1->Visible= true;
// Set Minimum to 1 to represent the first file being copied.
pBar1->Minimum= 1;
// Set Maximum to the total number of files to copy.
pBar1->Maximum= filenames->Length;
// Set the initial value of the ProgressBar.
pBar1->Value= 1;
// Set the Step property to a value of 1 to represent each file being
copied.
pBar1->Step= 1;
// Loop through all files to copy.
for ( int x= 1; x <= filenames->Length; x++ )
{
// Copy the file and increment the ProgressBar if successful.
if ( CopyFile( filenames[ x - 1 ] )== true )
{
// Perform the increment on the ProgressBar.
pBar1->PerformStep();
}
}
}

42. NumericUpDown

43. NumericUpDown properties
The interval
Starting value

44. NumericUpDown - coding
• Text property
private: System::Void button1_Click_1(System::Object^
System::EventArgs^ e)
{
textBox1->Text= numericUpDown1->Text;
}
sender,

45. NumericUpDown - coding
• Everything ok?
private: System::Void textBox1_TextChanged(System::Object^
System::EventArgs^ e)
{
numericUpDown1->Value=
textBox1->Text;
}
Compiler error. String assigned to int
sender,

46. NumericUpDown - coding
• As always, we can change anything at runtime
private: System::Void textBox1_TextChanged(System::Object^
System::EventArgs^ e)
{
numericUpDown1->Value=
}
int::Parse(textBox1->Text);
sender,

47. NumericUpDown - coding
• As always, we can change anything at runtime
private: System::Void textBox1_TextChanged(System::Object^
System::EventArgs^ e)
sender,
{
int i =int::TryParse(textBox1->Text, numericUpDown1->Value);
}

48. NumericUpDown - coding
• As always, we can change anything at runtime
private: System::Void textBox1_TextChanged(System::Object^
System::EventArgs^ e)
{
numericUpDown1->Text=
}
textBox1->Text;
sender,

49. PictureBox

50. PictureBox
• Very important for drawing!

51. PictureBox

52. PictureBox

53. PictureBox

54. PictureBox

55. PictureBox

56. PictureBox .gif

57. That’s it for today!