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Graphical User Interface

Graphical User Interface. Dr. Abraham Professor UTPA. Forms. Forms used to create GUIs for programs and it is a container for controls and components. Active window has a highlighted title bar and It has the focus

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Graphical User Interface

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  1. Graphical User Interface Dr. Abraham Professor UTPA

  2. Forms • Forms used to create GUIs for programs and it is a container for controls and components. • Active window has a highlighted title bar and It has the focus • When a control or component is dragged onto the form, visual studio generates code for it and can be viewed. • A programmer can write the code to place these controls as well. • See the example of adding pictures I discussed in class.

  3. Coding to add a button Friend WithEvents BtnMine As System.Windows.Forms.Button Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load BtnMine = New System.Windows.Forms.Button BtnMine.Location = New System.Drawing.Point(20, 20) BtnMine.Name = "BtnMine" BtnMine.Size = New System.Drawing.Size(75, 23) BtnMine.Text = "My Button" Controls.Add(BtnMine) End Sub

  4. Code generated for picture box PictureBox1 = New PictureBox PictureBox1.Image = Global.windowsForms.My.Resources.Resources._1 Me.PictureBox1.Location = New System.Drawing.Point(12, 51) Me.PictureBox1.Name = "PictureBox1" Me.PictureBox1.Size = New System.Drawing.Size(74, 97) Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.ClientSize = New System.Drawing.Size(284, 264) Me.Controls.Add(Me.PictureBox1)

  5. Now look at the program I discussed in class ‘PictureName = InputBox("What is the Name of the Picture?", "Picture") PictureName = "C:\vb2008\addPictures\" + PictureName pictBox = New PictureBox Controls.Add(pictBox) pictBox.BringToFront() pictBox.Image = Image.FromFile(PictureName) pictBox.Top = offset pictBox.Width = 100 pictBox.Height = 100 pictBox.Left = offset offset = offset + 10

  6. Change parameters in the code generated • Example comment picture box location • Add picturebox1.top • Etc. • You can learn coding for controls like this

  7. Control Properties & Layout • Tab Index • Enabled – focus • Anchor (remain at fixed distance from the sides) • Docking (Attaches a control to a container) • Labels, TextBoxes and Buttons. Password Textboxt box hides information typed. • Checkboxes,comboboxes, and radio buttons • Groupboxes and Panels to arrange controls and group them.

  8. MouseEnter, MouseLeave, MouseDown, MouseUp, MouseMove, MovesHover KeyDown, KeyUp, KeyPress, KeyChar, Handled, Alt, Control, Shift, etc. Keyboard & mouse Event Handling

  9. Rich Text Box • Writing a text editor. • File Opening and Reading • Writing to File • Drop Down Menus • Context Sensitive Menus • Changing Font attributes • See demo

  10. Other Features • Splash Screen • Check boxes and dropdown lists covered earlier • Background color change • Fade-in effect • Button tricks • See math game demo

  11. Printing to Default Printer • See demo

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