frmdraw.frm

Visual Basic 6 大学教程的代码

VERSION 5.00
Begin VB.Form frmDraw 
   AutoRedraw      =   -1  'True
   Caption         =   "Fig. 9.15: Drawing Properties"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   5955
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   5955
   StartUpPosition =   3  'Windows Default
   Begin VB.CommandButton cmdClear 
      Caption         =   "Clear"
      Height          =   495
      Left            =   1440
      TabIndex        =   9
      Top             =   1800
      Width           =   1215
   End
   Begin VB.CheckBox chkAutoRedraw 
      Caption         =   "AutoRedraw"
      Height          =   495
      Left            =   120
      TabIndex        =   8
      Top             =   2520
      Width           =   1215
   End
   Begin VB.CommandButton cmdDraw 
      Caption         =   "Draw"
      Height          =   495
      Left            =   120
      TabIndex        =   7
      Top             =   1800
      Width           =   1215
   End
   Begin VB.TextBox txtFillStyle 
      Height          =   375
      Left            =   1440
      TabIndex        =   3
      Text            =   "1"
      Top             =   1080
      Width           =   1215
   End
   Begin VB.TextBox txtDrawStyle 
      Height          =   375
      Left            =   1440
      TabIndex        =   2
      Text            =   "0"
      Top             =   600
      Width           =   1215
   End
   Begin VB.TextBox txtDrawMode 
      Height          =   375
      Left            =   1440
      TabIndex        =   1
      Text            =   "13"
      Top             =   120
      Width           =   1215
   End
   Begin VB.PictureBox picPicture 
      AutoRedraw      =   -1  'True
      Height          =   3135
      Left            =   2760
      ScaleHeight     =   3075
      ScaleWidth      =   3075
      TabIndex        =   0
      Top             =   0
      Width           =   3135
   End
   Begin VB.Label lblFillStyle 
      Caption         =   "FillStyle (0-7):"
      Height          =   375
      Left            =   0
      TabIndex        =   6
      Top             =   1080
      Width           =   1335
   End
   Begin VB.Label lblDrawStyle 
      Caption         =   "DrawStyle (0-6):"
      Height          =   375
      Left            =   0
      TabIndex        =   5
      Top             =   600
      Width           =   1335
   End
   Begin VB.Label lblDrawMode 
      Caption         =   "DrawMode (1-16):"
      Height          =   375
      Left            =   0
      TabIndex        =   4
      Top             =   120
      Width           =   1335
   End
End
Attribute VB_Name = "frmDraw"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
' Fig. 9.15
' DrawMode, DrawStyle, and FillStyle properties
Option Explicit

Private Sub Form_Load()
   picPicture.ForeColor = vbRed   ' Set drawing color
End Sub

Private Sub chkAutoRedraw_Click()
   ' Update picPicture's AutoRedraw
   picPicture.AutoRedraw = chkAutoRedraw.Value
End Sub

Private Sub cmdClear_Click()
   ' Enable AutoRedraw so the PictureBox can
   ' be cleared with a call to Cls
   picPicture.AutoRedraw = True
   Call picPicture.Cls
   
   ' Uncheck CheckBox and set AutoRedraw to
   ' False.
   chkAutoRedraw.Value = vbUnchecked
   picPicture.AutoRedraw = False
End Sub

Private Sub cmdDraw_Click()
   Dim v As Integer
   
   Call Randomize
   v = txtDrawMode.Text
   
   If v >= vbBlackness And v <= vbWhiteness Then
      picPicture.DrawMode = v
   Else
      picPicture.DrawMode = vbCopyPen
      txtDrawMode.Text = vbCopyPen
   End If
   
   v = txtDrawStyle.Text
   
   If v >= vbSolid And v <= vbInsideSolid Then
      picPicture.DrawStyle = v
   Else
      picPicture.DrawStyle = vbSolid
      txtDrawStyle.Text = vbSolid
   End If
   
   v = txtFillStyle.Text
   
   If v >= vbFSSolid And v <= vbDiagonalCross Then
      picPicture.FillStyle = v
   Else  ' Out of range reset to defaults
      picPicture.FillStyle = vbFSTransparent
      txtFillStyle.Text = vbFSTransparent
   End If
   
   ' Draw the circle
   picPicture.Circle (picPicture.Width / 2, _
                      picPicture.Height / 2), _
                      Int(2000 * Rnd())
End Sub