Introduction
This is really a re-run of an earlier post: Highlighting Reports, published in August 2007. The full code was written in the Report Class Module. The change here is that we will free up the Report Class Module and transfer all the Codes into an independent Class Module. The Report Detail Section Print Event is captured in the Class Module Object and runs the Code to highlight the required Report line item.
If you have tried out the sample Reports in the Demo Databases in the earlier two Posts then the Code we use in this Class Module (major part) is familiar to you.
If you have not come across those Articles then their links are given below:
The Highlight of this Project.
The Report Detail Section OnPrint() Event Procedure draws an oval-shaped circle, within the boundaries of the Text Box. The Text Box holds the exam marks from a Student's Table. If the student is not successful in obtaining his/her pass marks of 60% or more, then the Marks of such cases are highlighted with an oval-shaped circle around the marks.
Sample Image of the Report Demo Run Print Preview is given below:
Even though the Report design is a simple one I would like to draw your attention to the Text Box where we draw the oval shape around the Marks.
The oval shape is drawn within the boundaries of the Total Text Box. The size of the TextBox should not be too wide, like the Remarks Label, or too short. In either case, there will not be any problem in attempting to draw the shape inside the boundaries of the text box, but some portion of the shape may overlap or may not appear correctly around the marks within the TextBox.
The Class Module.
More details on this when we go through the Class Module Code.
The Class Module: ClsStudentHighlight Code is given below:
Option Compare Database Option Explicit Private WithEvents Rpt As Access.Report Private WithEvents secRpt As Access.[_SectionInReport] Private WithEvents secFutr As Access.[_SectionInReport] Private txt As Access.TextBox Private max As Access.TextBox Private pct As Access.TextBox Private lgnd As Access.Label Public Property Get mRpt() As Access.Report Set mRpt = Rpt End Property Public Property Set mRpt(RptNewVal As Access.Report) Const strEvent = "[Event Procedure]" On Error GoTo mRpt_Err Set Rpt = RptNewVal With Rpt Set secRpt = .Section(acDetail) Set secFutr = .Section(acFooter) secRpt.OnPrint = strEvent secFutr.OnPrint = strEvent End With Set txt = Rpt.Controls("Total") Set max = Rpt.Controls("Maxmarks") Set pct = Rpt.Controls("Percentage") Set lgnd = Rpt.Controls("Legend") mRpt_Exit: Exit Property mRpt_Err: MsgBox Err.Description, , "mRpt()" Resume mRpt_Exit End Property Private Sub secRpt_Print(cancel As Integer, PrintCount As Integer) ' Draw ellipse around controls that meet specified criteria. Dim m_max As Double Dim m_pct As Double Dim curval As Double Dim pf As Double Dim pp As Double Dim yn As Boolean On Error GoTo secRpt_Print_Err m_max = max.Value 'read Maxmarks TextBox Value pp = pct.Value 'read Pass Percentage TextBox value curval = Nz(txt.Value, 0) 'read obtained marks from Total TextBox pf = Int(curval / m_max * 100 ^ 2) / 100 'calculate obtained marks percentage yn = (pf >= pp) 'Passed or Not (TRUE/FALSE) 'call the DrawCircle Subroutine with Pass/Fail flag 'and the Control as parameters Call DrawCircle(yn, txt) secRpt_Print_Exit: Exit Sub secRpt_Print_Err: MsgBox Err.Description, , "secRpt_Print" Resume secRpt_Print_Exit End Sub Private Sub secFutr_Print(cancel As Integer, PrintCount As Integer) Dim y As Boolean, lbl As Control On Error GoTo secFutr_Print_Err y = False 'set the flag false to draw oval shape Set lbl = lgnd 'pass label control in Page Footer Call DrawCircle(y, lbl) 'draw circle in legend label secFutr_Print_Exit: Exit Sub secFutr_Print_Err: MsgBox Err.Description, , "secFutr_Print" Resume secFutr_Print_Exit End Sub Private Sub DrawCircle(ByVal bool As Boolean, ovlCtl As Control) Dim ctl As Control Dim bolPrintCircle As Boolean Dim sngAspect As Single Dim intShapeHeight As Integer Dim intShapeWidth As Integer Dim sngXCoord As Single Dim sngYCoord As Single On Error GoTo DrawCircle_Err If bool Then 'if pass no highlighting, change logic for pass cases bolPrintCircle = False Else 'highlight failed cases bolPrintCircle = True End If Set ctl = ovlCtl If Not IsNull(ctl) Then If bolPrintCircle Then ' change this value to adjust the oval shape of the circle. sngAspect = 0.25 ' Determine coordinates of ctl and to draw ellipse. ' Determine height and width of ellipse. intShapeHeight = ctl.Height intShapeWidth = ctl.Width 'calculate circle vertical Y coordinate sngYCoord = ctl.Top + (intShapeHeight \ 2) 'calculate horizontal X coordinate of circile sngXCoord = ctl.Left + (intShapeWidth \ 2) 'draw an ellipse around the Total TextBox Rpt.Circle (sngXCoord, sngYCoord), intShapeWidth \ 2, RGB(255, 0, 0), , , sngAspect bolPrintCircle = False End If End If DrawCircle_Exit: Exit Sub DrawCircle_Err: MsgBox Err.Description, , "DrawCircle()" Resume DrawCircle_Exit End Sub
In the Class Module Properties, the first line declares the Report Object in the Rpt variable.
The next two lines declare the Report Detail, and Footer Sections in secRpt and secFutr Object, respectively.
The next three lines declare Text Box Objects for selected Text Boxes in txt, max, and pct Objects to retrieve values from these controls on the Report.
The last Property declaration in the global area is a Label control. This will be used to draw an oval shape as a legend symbol, along with another label with the caption, 'Not Successful' indicating what the same symbol appearing around the students' marks signifies.
The Property Get Procedure is actually not required in this Module and it is added here for completeness. The Rpt Object is not at all accessed from outside this Module.
The Property Set Procedure receives the current Report Object through the Form_Load() Event Procedure as a parameter and assigns it to the Rpt Object.
Next, the Report Detail and Footer Sections are assigned to secRpt and secFutr Properties respectively to the Reportt two lines enable their Print Events to capture it when it happens on the Report.
The next three lines in the code assign the TextBox controls of the Report in txt, max, and pct TextBox Properties declared in the global area of the module.
There is an empty label control in the Report Footer Section of the Report with the name Legend. A Label Property is declared with the name lbl in the global area. The Legend label is assigned in the lbl Property through the last statement Set lbl = Rpt.Controls("Legend") in the Set Property Procedure.
There are three Sub-Routines in the Class Module. The Print Event when takes place in the Detail Section the secRpt_Print() runs, and when it happens in the Report Footer Section the sub-routine secFutr_Print() executes. The third sub-routine DrawCircle() is called from both the above-mentioned sub-routines to draw an oval shape or ellipse around some of the Total Text Boxes in the Detail Section of the Report and on the Legend Label control in the Report Footer Section of the Report.
The Report Detail Section Print Event
When the Report's Detail Section starts printing (during Print Preview, not Print View) the Print Event fires, and secRpt_Print() subroutines capture that Event and start executing the Code.
The TextBox Property (max, pct, and txt) values are read into m_max, pp, and curval local variables. The percentage of marks obtained by the student is calculated, up to two decimal places precision. It is compared with the Pass Percentage (pp) and arrives at the logical result of Passed (TRUE) or Not Successful (FALSE) and saves the result in Boolean variable yn.
Next, the DrawCircle() subroutine is called, passing the value in yn as the first Parameter and Total Text Box control as the second parameter.
The DrawCircle() Sub-Routine.
The DrawCircle() subroutine first checks whether the first parameter received in the boolean variable is TRUE or FALSE. Accordingly a local boolean variable bolPrintCircle is set with the TRUE/FALSE flag to signal the Circle drawing code segment to draw the shape or not to draw the shape.
In this sample demo, we have taken the failed students cases to highlight the Marks with an oval shape around them. So when the calculated marks percentage is below 60%, then the yn Flag is set to False. When the yn flag is False the bolPrintCircle is set to True to draw the circle around those values.
The Text Box's positional values Left, Top, and dimension Width and Height values are used to calculate the center point (Horizontal and Vertical point Coordinates) of the circle. The half measure of the Width Value of the Text Box determines the Radius of the circle.
If the Text Box is too wide then the circle drawn in the Text Box will lose the top and bottom sides of the circle, and the left and right sides of the circle will appear as two Arcs. The solution is to reduce the vertical radius of the circle (the Aspect Ratio), in relation to the actual radius value calculated based on the width of the Text Box.
The vertical radius of the circle is reduced to one fourth of the horizontal radius or the Aspect Ratio of the circle is set as sngAspect = 0.25. The end result is an oval-shaped circle around the Text Box value.
Aligning Text inside the Text Box
The Text Box value is horizontally text-aligned to the center of the Text Box. But, vertically the value will normally appear near the top edge of the Text Box (and near the top edge of the circle too). To shift the value down to make it appear somewhere in the middle of the oval shape vertically, the Top Margin is set with the value of 0.1cm manually in the design view. This property value can be set only at design time, not through Code.
In the Report Footer Section, there is a label control with the name Legend. In the Report Footer_Print() Event calls the DrawCircle() sub-routine with the label control as a parameter to draw an oval shape in the label control. There is another label control with the Caption Not Successful, indicating what the oval shape around the marks of the student signifies.
Report Module Code
Option Compare Database Option Explicit Private R As New ClsStudentHighlight Private Sub Report_Load() Set R.mRpt = Me End Sub
The ClsStudentHighlight Class Module is instantiated in Object R.
On the Report_Load() Event Procedure the current Report Object is assigned to the Property R.mRpt.
Download the Demo database from the link given below and try out the Report and Code.
Links to WithEvents ...Tutorials.
- WithEvents Ms-Access Class Module Tutorial
- WithEvents and Defining Your Own Events
- withevents Button Combo List TextBox Tab
- Access Form Control Arrays and Event Capturing
- Access Form Control Arrays and Event-2
- Access Form Control Arrays and Event-3
- WithEvents in Class Module for Sub-Form TextBox Events
- WithEvents in Class Module and Data Entry
- WithEvents and Access Report Event Sink
- WithEvents and Report Lines Hiding
- WithEvents and Report Lines Highlighting
- Withevents TextBox and Command Button Arrays
- Withevents TextBox CommandButton Dictionary
- Withevents and all Form Control Types