PC Answers 1996 December

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Visual Basic Form | 1995-08-15 | 25.8 KB | 704 lines

VERSION 4.00 Begin VB.Form DemoForm BackColor = &H00000000& Caption = "Screen Blanker Demo" ClientHeight = 4425 ClientLeft = 960 ClientTop = 1965 ClientWidth = 7470 BeginProperty Font name = "MS Sans Serif" charset = 1 weight = 700 size = 8.25 underline = 0 'False italic = 0 'False strikethrough = 0 'False EndProperty ForeColor = &H00000000& Height = 5115 Icon = "BLANKER.frx":0000 Left = 900 LinkMode = 1 'Source LinkTopic = "Form1" ScaleHeight = 4425 ScaleWidth = 7470 Top = 1335 Width = 7590 Begin VB.Timer Timer1 Interval = 1 Left = 6960 Top = 120 End Begin VB.CommandButton cmdStartStop BackColor = &H00000000& Caption = "Start Demo" Default = -1 'True Height = 390 Left = 240 TabIndex = 0 Top = 120 Width = 1830 End Begin VB.PictureBox picBall AutoSize = -1 'True BackColor = &H00000000& BorderStyle = 0 'None ForeColor = &H00FFFFFF& Height = 480 Left = 1800 Picture = "BLANKER.frx":030A ScaleHeight = 480 ScaleWidth = 480 TabIndex = 1 Top = 720 Visible = 0 'False Width = 480 End Begin VB.Image imgMoon Height = 480 Index = 8 Left = 6330 Picture = "BLANKER.frx":0614 Top = 3765 Visible = 0 'False Width = 480 End Begin VB.Line linLineCtl BorderColor = &H00FF0000& BorderWidth = 5 Visible = 0 'False X1 = 240 X2 = 4080 Y1 = 2760 Y2 = 2760 End Begin VB.Image imgMoon Height = 480 Index = 7 Left = 5760 Picture = "BLANKER.frx":091E Top = 3720 Visible = 0 'False Width = 480 End Begin VB.Image imgMoon Height = 480 Index = 6 Left = 5160 Picture = "BLANKER.frx":0C28 Top = 3720 Visible = 0 'False Width = 480 End Begin VB.Image imgMoon Height = 480 Index = 5 Left = 4560 Picture = "BLANKER.frx":0F32 Top = 3720 Visible = 0 'False Width = 480 End Begin VB.Image imgMoon Height = 480 Index = 4 Left = 3960 Picture = "BLANKER.frx":123C Top = 3720 Visible = 0 'False Width = 480 End Begin VB.Image imgMoon Height = 480 Index = 3 Left = 3360 Picture = "BLANKER.frx":1546 Top = 3720 Visible = 0 'False Width = 480 End Begin VB.Image imgMoon Height = 480 Index = 2 Left = 2760 Picture = "BLANKER.frx":1850 Top = 3720 Visible = 0 'False Width = 480 End Begin VB.Image imgMoon Height = 480 Index = 1 Left = 2160 Picture = "BLANKER.frx":1B5A Top = 3720 Visible = 0 'False Width = 480 End Begin VB.Image imgMoon Height = 480 Index = 0 Left = 1560 Picture = "BLANKER.frx":1E64 Top = 3720 Visible = 0 'False Width = 480 End Begin VB.Shape shpClone BackColor = &H00000000& BackStyle = 1 'Opaque BorderColor = &H00FF0000& FillColor = &H000000FF& Height = 1215 Index = 0 Left = 240 Top = 720 Visible = 0 'False Width = 1410 End Begin VB.Shape Shape1 Height = 15 Left = 960 Top = 1080 Width = 15 End Begin VB.Menu mnuOption Caption = "&Options" Begin VB.Menu mnuLineCtlDemo Caption = "&Jumpy Line" Checked = -1 'True End Begin VB.Menu mnuCtlMoveDemo Caption = "Re&bound" End Begin VB.Menu mnuImageDemo Caption = "&Spinning Moon" End Begin VB.Menu mnuShapeDemo Caption = "&Madhouse" End Begin VB.Menu mnuPSetDemo Caption = "&Confetti" End Begin VB.Menu mnuLineDemo Caption = "C&rossfire" End Begin VB.Menu mnuCircleDemo Caption = "Rainbo&w Rug" End Begin VB.Menu mnuScaleDemo Caption = "Co&lor Bars" End Begin VB.Menu sep1 Caption = "-" End Begin VB.Menu mnuExit Caption = "E&xit" End End Attribute VB_Name = "DemoForm" Attribute VB_Creatable = False Attribute VB_Exposed = False Option Explicit ' Declare a variable to track animation frame. Dim Shared FrameNum ' Declare the X- and Y-coordinate variables to track position. Dim Shared XPos Dim Shared YPos ' Declare a variable flag to stop graphic routines in Do Loops. Dim Shared DoFlag ' Declare a variable to track moving controls. Dim Shared Motion ' Declare form variables for color. Dim R Dim G Dim B Private Sub CircleDemo() ' Declare local variables. Dim Radius ' Create random RGB colors. R = 255 * Rnd G = 255 * Rnd B = 255 * Rnd ' Position center of circles in the center of the form. XPos = ScaleWidth / 2 YPos = ScaleHeight / 2 ' Generate a radius between 0 and almost half the form's height. Radius = ((YPos * 0.9) + 1) * Rnd ' Draw a circle on the form. Circle (XPos, YPos), Radius, RGB(R, G, B) End Sub Private Sub cmdStartStop_Click() ' Declare local variables. Dim UnClone Dim MakeClone Dim X1 Dim Y1 Select Case DoFlag Case True cmdStartStop.Caption = "Start Demo" DoFlag = False mnuOption.Enabled = True If mnuCtlMoveDemo.Checked = True Then ' Hide bouncing graphic again. picBall.Visible = False ElseIf mnuLineDemo.Checked = True Then ' Remove lines from the form. Cls ElseIf mnuShapeDemo.Checked = True Then ' Remove all dynamically loaded Shape controls. For UnClone = 1 To 20 Unload shpClone(UnClone) Next UnClone ' Reset background color of form to black. DemoForm.BackColor = QBColor(0) ' Refresh form so color change takes effect. Refresh ElseIf mnuPSetDemo.Checked = True Then ' Remove confetti bits from form. Cls ElseIf mnuLineCtlDemo.Checked = True Then ' Hide Line control again. linLineCtl.Visible = False ' Remove any stray pixels left after hiding line. Cls ElseIf mnuImageDemo.Checked = True Then ' Hide bouncing graphic again. imgMoon(0).Visible = False ElseIf mnuScaleDemo.Checked = True Then ' Clear the form. Cls ' Return form to the default scale. Scale ElseIf mnuCircleDemo.Checked = True Then ' Remove the circles from the form. Cls End If Case False cmdStartStop.Caption = "Stop Demo" DoFlag = True mnuOption.Enabled = False If mnuCtlMoveDemo.Checked = True Then ' Make the bouncing graphic (picture box control) visible. picBall.Visible = True ' Determine initial motion of bouncing graphic at random. ' Settings are 1 to 4. The value of the Motion variable determines ' what part of the Do Loop routine runs. Motion = Int(4 * Rnd + 1) ElseIf mnuLineDemo.Checked = True Then ' Initialize the random-number generator. Randomize ' Set the line width. DrawWidth = 2 ' Set the initial X- and Y-coordinates to a random location on the form. X1 = Int(DemoForm.Width * Rnd + 1) Y1 = Int(DemoForm.Height * Rnd + 1) ElseIf mnuShapeDemo.Checked = True Then ' Dynamically load a control array of 20 shape controls on the form. For MakeClone = 1 To 20 Load shpClone(MakeClone) Next MakeClone ElseIf mnuPSetDemo.Checked = True Then ' Set the thickness of the confetti bits. DrawWidth = 5 ElseIf mnuLineCtlDemo.Checked = True Then ' Make the line control visible. linLineCtl.Visible = True ' Set thickness of the line as it will appear. DrawWidth = 7 ElseIf mnuImageDemo.Checked = True Then ' Make the bouncing graphic (image control) visible. imgMoon(0).Visible = True ' Set initial animation frame. FrameNum = 0 ' Determine the initial motion of the bouncing graphic at random. ' Settings are 1 to 4. The Value of the Motion variable determines ' what part of the Do Loop routine runs. Motion = Int(4 * Rnd + 1) ElseIf mnuScaleDemo.Checked = True Then ' Initialize the random-number generator. Randomize ' Set the width of the box outlines so boxes don't overlap. DrawWidth = 1 ' Set the value of the X-coordinate to the left edge of form. ' Set the first box's X-coordinate = 1, second box = 2, and so on. ScaleLeft = 1 ' Set the Y-coordinate of top edge of form to 10. ScaleTop = 10 ' Set the number of units of the form width to a random number between ' 3 and 12. This changes the number of boxes drawn each time the ' routine starts. ScaleWidth = Int(13 * Rnd + 3) ' Set the number of units in the form height to -10. Then the height of all boxes ' varies from 0 to 10, and Y-coordinates start at the bottom of the form. ScaleHeight = -10 ElseIf mnuCircleDemo.Checked = True Then ' Define the width of the circle outline. DrawWidth = 1 ' Draw circles as dashed lines. DrawStyle = vbDash ' Draw lines using the XOR pen, combining colors found in the pen or ' in the display, but not in both. DrawMode = vbXorPen End If End Select End Sub Private Sub CtlMoveDemo() Select Case Motion Case 1 ' Move the graphic left and up by 20 twips using the Move method. picBall.Move picBall.Left - 20, picBall.Top - 20 ' If the graphic reaches the left edge of the form, move it to the right and up. If picBall.Left <= 0 Then Motion = 2 ' If the graphic reaches the top edge of the form, move it to the left and down. ElseIf picBall.Top <= 0 Then Motion = 4 End If Case 2 ' Move the graphic right and up by 20 twips. picBall.Move picBall.Left + 20, picBall.Top - 20 ' If the graphic reaches the right edge of the form, move it to the left and up. ' Routine determines the right edge of the form by subtracting the graphic ' width from the form width. If picBall.Left >= (DemoForm.Width - picBall.Width) Then Motion = 1 ' If the graphic reaches the top edge of the form, move it to the right and down. ElseIf picBall.Top <= 0 Then Motion = 3 End If Case 3 ' Move the graphic right and down by 20 twips. picBall.Move picBall.Left + 20, picBall.Top + 20 ' If the graphic reaches the right edge of the form, move it to the left and down. If picBall.Left >= (DemoForm.Width - picBall.Width) Then Motion = 4 ' If the graphic reaches the bottom edge of the form, move it to the right and up. ' Routine determines the bottom of the form by subtracting ' the graphic height from the form height less 680 twips for the height ' of title bar and menu bar. ElseIf picBall.Top >= (DemoForm.Height - picBall.Height) - 680 Then Motion = 2 End If Case 4 ' Move the graphic left and down by 20 twips. picBall.Move picBall.Left - 20, picBall.Top + 20 ' If the graphic reaches the left edge of the form, move it to the right and down. If picBall.Left <= 0 Then Motion = 3 ' If the graphic reaches the bottom edge of the form, move it to the left and up. ElseIf picBall.Top >= (DemoForm.Height - picBall.Height) - 680 Then Motion = 1 End If End Select End Sub Private Sub Delay() Dim Start Dim Check Start = Timer Do Until Check >= Start + 0.15 Check = Timer Loop End Sub Private Sub Form_Load() DoFlag = False End Sub Private Sub Form_Resize() If mnuScaleDemo.Checked = True And DemoForm.WindowState = 0 Then ' Initialize the random-number generator. Randomize ' Set the width of the box outlines to narrow so the boxes don't overlap. DrawWidth = 1 ' Set the value of the X-coordinate of the left edge of the form to 1. ' This makes it easy to set the position for each box. The first box has ' an X-coordinate of 1, the second has an X-coordinate of 2, and so on. ScaleLeft = 1 ' Set the value of the Y-coordinate of the top edge of the form to 10. ScaleTop = 10 ' Set the number of units in the width of the form to a random number between ' 3 and 12. This changes the number of boxes that are drawn each time the user ' starts this routine. ScaleWidth = Int(13 * Rnd + 3) ' Set the number of units in the height of the form to -10. This has ' two effects. First, all the boxes then have a height that varies from 0 to 10. ' Second, the negative value causes the Y-coordinates to begin at the bottom ' edge of the form instead of at the top. ScaleHeight = -10 End If End Sub Private Sub Form_Unload(Cancel As Integer) End End Sub Private Sub ImageDemo() Select Case Motion Case 1 ' Move the graphic to the left and up by 100 twips using the Move method. imgMoon(0).Move imgMoon(0).Left - 100, imgMoon(0).Top - 100 ' Increment animation to next frame. IncrFrame ' If the graphic reaches the left edge of the form, move right and up. If imgMoon(0).Left <= 0 Then Motion = 2 ' If the graphic reaches the top edge of the form, move left and down. ElseIf imgMoon(0).Top <= 0 Then Motion = 4 End If Case 2 ' Move the graphic right and up by 100 twips. imgMoon(0).Move imgMoon(0).Left + 100, imgMoon(0).Top - 100 ' Increment animation to next frame. IncrFrame ' If the graphic reaches the right edge of the form, move left and up. ' Routine determines the right edge of the form by subtracting ' the graphic width from the control width. If imgMoon(0).Left >= (DemoForm.Width - imgMoon(0).Width) Then Motion = 1 ' If the graphic reaches the top edge of the form, move right and down. ElseIf imgMoon(0).Top <= 0 Then Motion = 3 End If Case 3 ' Move the graphic right and down by 100 twips. imgMoon(0).Move imgMoon(0).Left + 100, imgMoon(0).Top + 100 ' Increment animation to next frame. IncrFrame ' If the graphic reaches the right edge of the form, move left and down. If imgMoon(0).Left >= (DemoForm.Width - imgMoon(0).Width) Then Motion = 4 ' If the graphic reaches bottom edge of form, move right and up. ' Routine determines the bottom edge of the form by subtracting the graphic ' height from the form height minus 680 twips for the height of the title ' bar and menu bar. ElseIf imgMoon(0).Top >= (DemoForm.Height - imgMoon(0).Height) - 680 Then Motion = 2 End If Case 4 ' Move the graphic left and down by 100 twips. imgMoon(0).Move imgMoon(0).Left - 100, imgMoon(0).Top + 100 ' Increment animation to next frame. IncrFrame ' If the graphic reaches the left edge of the form, move right and down. If imgMoon(0).Left <= 0 Then Motion = 3 ' If the graphic reaches the bottom edge of the form, move left and up. ElseIf imgMoon(0).Top >= (DemoForm.Height - imgMoon(0).Height) - 680 Then Motion = 1 End If End Select End Sub Private Sub IncrFrame() ' Increment frame number. FrameNum = FrameNum + 1 ' Control array with animation frames has elements 0 to 7. At the eighth ' frame, reset the frame number to 0 for an endless animation loop. If FrameNum > 8 Then FrameNum = 1 End If ' Set the Picture property of the image control to the Picture property of the current frame. imgMoon(0).Picture = imgMoon(FrameNum).Picture ' Pause display so animation isn't too fast. Delay End Sub Private Sub LineCtlDemo() ' Set X- and Y-coordinates (left/right position) of the line's start position to a ' random location on the form. linLineCtl.X1 = Int(DemoForm.Width * Rnd) linLineCtl.Y1 = Int(DemoForm.Height * Rnd) ' Set X- and Y-coordinates (left/right position) of line's end position to ' a random location on the form. linLineCtl.X2 = Int(DemoForm.Width * Rnd) linLineCtl.Y2 = Int(DemoForm.Height * Rnd) ' Clear the form to remove any stray pixels. Cls ' Pause display before moving the line again. Delay End Sub Private Sub LineDemo() ' Declare local variables. Dim X2 Dim Y2 ' Create random RGB colors. R = 255 * Rnd G = 255 * Rnd B = 255 * Rnd ' Set the end point of the line control to a random location on the form. X2 = Int(DemoForm.Width * Rnd + 1) Y2 = Int(DemoForm.Height * Rnd + 1) ' Using the Line method, draw from current coordinates to current end ' point, giving line a random color. Each line starts where the last ' line ends. Line -(X2, Y2), RGB(R, G, B) End Sub Private Sub mnuCircleDemo_Click() Cls mnuCtlMoveDemo.Checked = False mnuLineDemo.Checked = False mnuShapeDemo.Checked = False mnuPSetDemo.Checked = False mnuLineCtlDemo.Checked = False mnuImageDemo.Checked = False mnuScaleDemo.Checked = False mnuCircleDemo.Checked = True End Sub Private Sub mnuCtlMoveDemo_Click() Cls mnuCtlMoveDemo.Checked = True mnuLineDemo.Checked = False mnuShapeDemo.Checked = False mnuPSetDemo.Checked = False mnuLineCtlDemo.Checked = False mnuImageDemo.Checked = False mnuScaleDemo.Checked = False mnuCircleDemo.Checked = False End Sub Private Sub mnuExit_Click() End End Sub Private Sub mnuImageDemo_Click() Cls mnuCtlMoveDemo.Checked = False mnuLineDemo.Checked = False mnuShapeDemo.Checked = False mnuPSetDemo.Checked = False mnuLineCtlDemo.Checked = False mnuImageDemo.Checked = True mnuScaleDemo.Checked = False mnuCircleDemo.Checked = False End Sub Private Sub mnuLineCtlDemo_Click() Cls mnuCtlMoveDemo.Checked = False mnuLineDemo.Checked = False mnuShapeDemo.Checked = False mnuPSetDemo.Checked = False mnuLineCtlDemo.Checked = True mnuImageDemo.Checked = False mnuScaleDemo.Checked = False mnuCircleDemo.Checked = False End Sub Private Sub mnuLineDemo_Click() Cls mnuCtlMoveDemo.Checked = False mnuLineDemo.Checked = True mnuShapeDemo.Checked = False mnuPSetDemo.Checked = False mnuLineCtlDemo.Checked = False mnuImageDemo.Checked = False mnuScaleDemo.Checked = False mnuCircleDemo.Checked = False End Sub Private Sub mnuPSetDemo_Click() Cls mnuCtlMoveDemo.Checked = False mnuLineDemo.Checked = False mnuShapeDemo.Checked = False mnuPSetDemo.Checked = True mnuLineCtlDemo.Checked = False mnuImageDemo.Checked = False mnuScaleDemo.Checked = False mnuCircleDemo.Checked = False End Sub Private Sub mnuScaleDemo_Click() Cls mnuCtlMoveDemo.Checked = False mnuLineDemo.Checked = False mnuShapeDemo.Checked = False mnuPSetDemo.Checked = False mnuLineCtlDemo.Checked = False mnuImageDemo.Checked = False mnuScaleDemo.Checked = True mnuCircleDemo.Checked = False End Sub Private Sub mnuShapeDemo_Click() Cls mnuCtlMoveDemo.Checked = False mnuLineDemo.Checked = False mnuShapeDemo.Checked = True mnuPSetDemo.Checked = False mnuLineCtlDemo.Checked = False mnuImageDemo.Checked = False mnuScaleDemo.Checked = False mnuCircleDemo.Checked = False End Sub Private Sub PSetDemo() ' Create random RGB colors. R = 255 * Rnd G = 255 * Rnd B = 255 * Rnd ' XPos sets the horizontal position of a confetti bit to a random location on the form. XPos = Rnd * ScaleWidth ' YPos sets the vertical position of a confetti bit to a random location on the form. YPos = Rnd * ScaleHeight ' Draw a confetti bit at XPos, YPos. Assign the confetti bit a random color. PSet (XPos, YPos), RGB(R, G, B) End Sub Private Sub ScaleDemo() ' Declare local variables. Dim Box ' Creates the same number of boxes as units in the width of the form. For Box = 1 To ScaleWidth ' Create random RGB colors. R = 255 * Rnd G = 255 * Rnd B = 255 * Rnd ' Draw boxes using te Line method with the B (box) F (filled) options. ' Boxes start at each X-coordinate determined by ScaleWidth and at ' a Y-coordinate of 0 (bottom of form). Each box is 1 unit wide and ' has a random height between 0 and 10. Fill the box with a random color. Line (Box, 0)-Step(1, (Int(11 * Rnd))), RGB(R, G, B), BF Next Box ' Pause to display all boxes before redraw. Delay End Sub Private Sub ShapeDemo() ' Declare local variables. Dim CloneID ' Create random RGB colors. R = 255 * Rnd G = 255 * Rnd B = 255 * Rnd ' Set the form's background color to a random value. DemoForm.BackColor = RGB(R, G, B) ' Select a random shape control in the control array. CloneID = Int(20 * Rnd + 1) ' XPos and YPos set position of selected shape control to a random ' location on the form. XPos = Int(DemoForm.Width * Rnd + 1) YPos = Int(DemoForm.Height * Rnd + 1) ' Set the shape of the selected shape control to a random shape. shpClone(CloneID).Shape = Int(6 * Rnd) ' Set the height and width of a selected shape control to a random size between ' 500 and 2500 twips. shpClone(CloneID).Height = Int(2501 * Rnd + 500) shpClone(CloneID).Width = Int(2501 * Rnd + 500) ' Set the background color and DrawMode property of the shape control to a random color. shpClone(CloneID).BackColor = QBColor(Int(15 * Rnd)) shpClone(CloneID).DrawMode = Int(16 * Rnd + 1) ' Move the selected shape control to XPos, YPos. shpClone(CloneID).Move XPos, YPos ' Make the selected shape control visible. shpClone(CloneID).Visible = True ' Wait briefly before selecting and changing the next shape control. Delay End Sub Private Sub Timer1_Timer() If mnuCtlMoveDemo.Checked And DoFlag = True Then CtlMoveDemo ElseIf mnuLineDemo.Checked And DoFlag = True Then LineDemo ElseIf mnuShapeDemo.Checked And DoFlag = True Then ShapeDemo ElseIf mnuPSetDemo.Checked And DoFlag = True Then PSetDemo ElseIf mnuLineCtlDemo.Checked And DoFlag = True Then LineCtlDemo ElseIf mnuImageDemo.Checked And DoFlag = True Then ImageDemo ElseIf mnuScaleDemo.Checked And DoFlag = True Then ScaleDemo ElseIf mnuCircleDemo.Checked And DoFlag = True Then CircleDemo End If End Sub