C++ Windows Forms L03 - Controls P2

transcript

Mohammad Shakermohammadshakergtr.wordpress.com

C++.NET Windows Forms Course@ZGTRShaker

C++.NET Windows Forms Course

L03 – Controls Part 2

Switching Between Forms

It’s another form..

Switching between forms

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 )

– #3: pointing to the other form

– #4: and start playing with it :D

#include "Form2.h"

Form2 ^f= gcnew Form2;

f->Show();

Switching Back to Form1

• In “Form2.h”

public: Form1 ^FPtr;

namespace MyTestPro {

ref class Form1;

Form2(Form1 ^f)

InitializeComponent();

FPtr= f;

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^ sender,

System::EventArgs^ e)

FPtr->Text= “New Form1 Text!";

Peak on Drawing ClassPoint & Size

Peak on Drawing::Point

• What will happen now?

private: System::Void button1_Click(System::Object^

sender, System::EventArgs^ e)

button1->Location= 30,120;

Peak on Drawing::Point

private: System::Void button1_Click(System::Object^ sender,

Drawing::Point P;

P.X= 2;

P.Y= 23;

button1->Location= P;

Drawing::Point

Helpers

So, what should we do?

Point and Size

• Can we do this? Yes!private: System::Void button1_Click_1(System::Object^ sender,

Drawing::Size S;

S.Height= 200;

S.Width= 300;

this->Size= S;

Point and Size

• Can we do this? private: System::Void button1_Click_1(System::Object^ sender,

Drawing::Size ^S;

S->Height= 200;

S->Width= 300;

this->Size= S;

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:\users\zgtr\documents\visual studio

2008\projects\dotnet4\dotnet4\Form1.h 129 dotNet4

Helpers

Point and Size

private: System::Void button1_Click_1(System::Object^

sender, System::EventArgs^ e)

this->Size= Drawing::Size(200,300);

Works!

Helpers

Point and Size

• Properties:Name, Text, Font, image, Location, Size, TabStop, TabIndex, Visible, BackColor

• Event:MouseClick, MouseDown, MouseLeave, Resize, SizeChange, TextChanged, VisibleChanged, KeyUp, KeyDown, DragDrop

TextBox

• Properties:Name, Text, Font, image, Location, Size, TabStop, TabIndex, Visible, BackColor, MultiLine, ScrollBar

• Properties:Name, Text, Font, image, Location, Size, TabStop, TabIndex, Visible, BackColor, Border Style, AutoSize

TrackBar

Keyboard keys (Arrows)

position

Number of ticks between tick marks

TrackBar

private: System::Void trackBar1_Scroll(System::Object^ sender,

textBox1->Text= trackBar1->Value.ToString();

TrackBar

ProgressBar

• Increment the progressBar and perform the “performStep()” • What will happen when pressing the button?

private: System::Void button1_Click_4(System::Object^ sender,

progressBar1->PerformStep();

ProgressBar

• What will happen now when pressing the button, repeatedly?

progressBar1->PerformStep();

textBox1->Text= progressBar1->Value.ToString();

ProgressBar After clicking button1 for 1st time

After clicking button1 for 2nd time

Before clicking button1

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.

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();

NumericUpDown

NumericUpDown properties

The interval

Starting value

NumericUpDown - coding

• Text property

textBox1->Text= numericUpDown1->Text;

• Everything ok?

private: System::Void textBox1_TextChanged(System::Object^ sender,

numericUpDown1->Value= textBox1->Text;

Compiler error. String assigned to int

• As always, we can change anything at runtime

numericUpDown1->Value= int::Parse(textBox1->Text);

int i =int::TryParse(textBox1->Text, numericUpDown1->Value);

numericUpDown1->Text= textBox1->Text;

PictureBox

• Very important for drawing!

PictureBox

PictureBox .gif

That’s it for today!

C++ Windows Forms L03 - Controls P2

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