Class Concepts

In this first mind, map concentrates on class, object, constructor, method, field and property. At the centre of mind map class Mobile was created, which has objects, Companies of the mobile like (Apple, Samsung etc.) and in the class, there are fields like price, model_number. These fields are declared as private and through properties Price and Model_Number, these private fields were accessed. The property contains get and set auto properties. Basically, fields were discussed as private and property provides abstraction allowing us to change the fields while not affecting the external way that they were accessed by the things that present in the class. The class has a constructor which initializes the price, model_number and name. There are methods Call () ,Playing_Games() and Search_App() which can be accessed by the Mobile class objects. The pseudo code is also given showing how exactly that looks.

C# drawing

Using Splashkit

Creating a Window:

In Splashkit, window is used to create and manage the graphics. Window is a class in C# and required to pass the title of the window, height and width. An example is shown below.

Every C# program will be executed from the main method(), and while creating the object of the window as discussed title of the window, width and height were passed.

Splashkit provides Delay which puts the running program in sleep for a specified number of milliseconds. In the above program, Delay was given 10000 milliseconds. Hence, the window will be displayed to that amount of time.

As the code does not contain any thing to display on the window, so, it will appear blank.

To run the open the terminal ,write and run the bellow command.

   Ø  dotnet run

which will open the above window and delays for 10 seconds.

2. Drawing shapes into the window.

You can draw different shapes into the window using Splashkit. Just making some changes in the above program will display the shapes.

The code shows different shapes which can be drawn on to the window. We need to pass the co-ordinates of window to draw the image in that particular location.

There are many shape drawing procedures in the Splashkit, each procedure take values based on their requirement.

Drawing Bitmap on Window:

Bitmap is a small image which can be displayed on the window. Bitmap is a class which takes name and image name while creating an object.

 This code will draw the Bitmap image Human.png on the window at the location 200, 300 pixels. Before running this code open command line and type
     
            >skm resources.

Which generates folders for database, image, sound etc. Through this, we can access the images into the program. and displays as

User Interactions and Events:

In Splashkit, user can interact with the window using ProcessEvents. This checks both the keyboard and mouse states. ie., when the user types a key or press mouse button then event will be triggered.

Some example of mouse and keyboard events are

1. MouseClicked()
2. MouseDown()
3. MouseMovement()
4. MouseUp()
5. KeyUp
6. KeyDown()

Key events are accessed by attribute KeyCode. i.e.,

Splashkit.KeyDown(KeyCode.UpKey)

The above method will trigger the event when the Up key is pressed.

Collisions in Splashkit: 

This library in Splashkit will determine the occurrence of a collision. This library is mainly used for creating the games.

There are number of Collision detecting method but in this, we will cover main topics.

1. bitmap and circle collision. This will detect the collision happened between bitmap and circle.

syntax: public bool BitmapCircleCollision(Circle,Bitmap)

this will return true if there is any collision between circle and bitmap.

2. bitmap collision.

syntax: public bool BitmapCollision(Bitmap1,Bitmp2)

this will return if there is any collision between two bitmaps.

3. CircleCollision

syntax: public bool CircleCollision(Circle1,Circle2)

this will return if there is any collision between two circles.