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Rating 4.5 stars (70,471) · Free · Business/Productivity Recall that this application will allow end users to select from two predefined shapes in a given color. You will provide a way to allow users to save their graphical data to a file, so you want to define a custom class type that encapsulates each of these details; for the sake of simplicity, you do this using C# automatic properties (see 5 for more details on how to do this). Begin by adding a new class to your project named ShapeData.cs and implementing this type as follows: [Serializable] class ShapeData { // The upper left of the shape to be drawn. public Point UpperLeftPoint { get; set; } // The current color of the shape to be drawn. public Color Color { get; set; } // The type of shape. public SelectedShape ShapeType { get; set; } } Here, ShapeData uses three automatic properties that encapsulates various types of data, two of which (Point and Color) are defined in the System.Drawing namespace, so be sure to import this namespace into your code file. Also, notice that this type has been adorned with the [Serializable] attribute. In an upcoming step, you will configure your MainWindow type to maintain a list of ShapeData types that you persist using object serialization services (see 20 for more details). online pdf printer: Protect PDF - Protect your PDF documents online - PDF2Go print pdf online Print in PDF: Online PDF conversion for free
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Rating 4.5 stars (70,471) · Free · Business/Productivity Figure A-24. The ShapePickerDialog type Now, open the code window for your dialog box by right-clicking the Forms designer and selecting the View Code menu option. Within the MyPaintProgram namespace, define an enumeration (named SelectedShape) that defines names for each possible shape: public enum SelectedShape { Circle, Rectangle } Next, update your current ShapePickerDialog class type: Add an automatic property of type SelectedShape. The caller can use this property to determine which shape to render. Handle the Click event for the OK button using the Properties window. Implement this event handler to determine whether the circle radio button has been selected (through the Checked property). If so, set your SelectedShape property to SelectedShape.Circle; otherwise, set this property to SelectedShape.Rectangle. Here is the complete code: public partial class ShapePickerDialog : Form { public SelectedShape SelectedShape { get; set; } public ShapePickerDialog() { InitializeComponent(); } private void btnOK_Click(object sender, EventArgs e) { if (radioButtonCircle.Checked) SelectedShape = SelectedShape.Circle; else SelectedShape = SelectedShape.Rectangle; } } That wraps up the infrastructure of your program. Now all you need to do is implement the Click event handlers for the remaining menu items on the main window. CHAPTER 1 s DESIGN PATTERNS: MAKING CSS EASY! online pdf printer Protect PDF Online - FREE Tool to Protect PDF Files | Altoprotectpdf ...
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Upload any file to convert and print to PDFs. No registration or sign in ... With our free online tool, printing a file to PDF is fast, simple and accurate. edit pdf files ... Returning to the construction of the main window, add three new member variables to this Form. These member variables allow you to keep track of the selected shape (through a SelectedShape enum member variable), the selected color (represented by a System.Drawing.Color member variable), and through each of the rendered images held in a generic List<T> (where T is of type ShapeData): public partial class MainWindow : Form { // Current shape / color to draw. private SelectedShape currentShape; private Color currentColor = Color.DarkBlue; // This maintains each ShapeData. private List<ShapeData> shapes = new List<ShapeData>(); ... } Next, you handle the MouseDown and Paint events for this Form-derived type using the Properties window. You will implement them in a later step; for the time being, however, you should find that the IDE has generated the following stub code: private void MainWindow_Paint(object sender, PaintEventArgs e) { } private void MainWindow_MouseDown(object sender, MouseEventArgs e) { } print pdf online cheap PDF Printer - Free Online Tool to Print to PDF - Smallpdf.com
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