在canvas中如果设置了matrix(其值不为(1,0,0,1,0,0)),然后使用fillText绘制文本时,绘制出来的文本的字符间距不正确

<!DOCTYPE HTML>
<html>
<head>
<style type="text/css">
@font-face {
font-family: 'dimmflmyriadprobold';
src: url('dimmflmyriadprobold.eot');
src: url('dimmflmyriadprobold.eot?#iefix') format('embedded-opentype'),
url('dimmflmyriadprobold.woff') format('woff'),
url('dimmflmyriadprobold.svg#dimmflmyriadprobold') format('svg');
font-weight: normal;
font-style: normal;
.txtBox{font-family: 'dimmflmyriadprobold'; font-size:30pt;}
.txtN{font-size:30pt;}
</style>
</head>
<body>
<span class="txtN"> Contents</span><br/>
<span class="txtBox"> Contents</span><br/>
<canvas id="myCanvas" width="792px" height="1056px" style="border:1px solid #c3c3c3;">
Your browser does not support the canvas element.
</canvas>
<script type="text/javascript">
function PDMatrix() {
this.a = 1;//float
this.b = 0; //float
this.c = 0; //float
this.d = 1; //float
this.e = 0; //float
this.f = 0; //float
this.Set = function (a, b, c, d, e, f) {
this.a = a;
this.b = b;
this.c = c;
this.d = d;
this.e = e;
this.f = f;
this.Reset = function () {
this.a = this.d = 1;
this.b = this.c = this.e = this.f = 0;
this.SetReverse = function (mt) {
var i = mt.a * mt.d - mt.b * mt.c;
if (i == 0) return;
var j = -i;
this.a = mt.d / i;
this.b = mt.b / j;
this.c = mt.c / j;
this.d = mt.a / i;
this.e = (mt.c * mt.f - mt.d * mt.e) / i;
this.f = (mt.a * mt.f - mt.b * mt.e) / j;
//fRadian 为弧度（2*Math.PI/360 * o），而非角度；
this.Rotate = function (fRadian, bPrepended) {
var cosValue = Math.cos(fRadian);
var sinValue = Math.sin(fRadian);
var m = new PDMatrix();
m.Set(cosValue, sinValue, -sinValue, cosValue, 0, 0);
var rel = null;
if (bPrepended)
rel = Concat2mt(m, this);
else
rel = Concat2mt(this, m);
this.Set(rel.a, rel.b, rel.c, rel.d, rel.e, rel.f);
this.RotateAt = function (dx, dy, fRadian, bPrepended) {
this.Translate(dx, dy, bPrepended);
this.Rotate(fRadian, bPrepended);
this.Translate(-dx, -dy, bPrepended);
this.Concat = function (a, b, c, d, e, f, bPrepended) {
var m = new PDMatrix();
m.Set(a, b,c,d,e,f);
var rel = null;
rel = this.Concat2mt(this, m);
this.Set(rel.a, rel.b, rel.c, rel.d, rel.e, rel.f);
this.TransFormPoint = function (x, y) {
var fx = this.a * x + this.c * y + this.e;
var fy = this.b * x + this.d * y + this.f;
var rel = [];
rel[0] = fx; rel[1] = fy;
return rel;
this.Concat2mt=function(m1, m2){
var aa = m1.a * m2.a + m1.b * m2.c;
var bb = m1.a * m2.b + m1.b * m2.d;
var cc = m1.c * m2.a + m1.d * m2.c;
var dd = m1.c * m2.b + m1.d * m2.d;
var ee = m1.e * m2.a + m1.f * m2.c + m2.e;
var ff = m1.e * m2.b + m1.f * m2.d + m2.f;
var m = new PDMatrix();
m.Set(aa, bb, cc, dd, ee, ff);
return m;
//PDMatrix.prototype.
var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.save();
var text = "Contents";
ctx.fillStyle = "black";
var mt_text = new PDMatrix();
mt_text.Set(9.960,0,0,9.960,473.040,760.860);
mt_text.Concat(1.3333, 0, 0, -1.3333, 0, 1056,false);
var m2 = new PDMatrix();
m2.Set(1,0,0,-1,0,0);
m2.Concat(mt_text.a, mt_text.b, mt_text.c, mt_text.d, mt_text.e, mt_text.f);
ctx.setTransform(m2.a, m2.b, m2.c, m2.d, m2.e, m2.f);
ctx.font = "normal 0.75pt 'Arrial'";
ctx.fillText(text, 0,0);
ctx.restore();
</script>
</body>
</html>

Ok that's jacked up. . . I put in a normal set of iPod headphones. . . (ones without the push button) and they were fine. Then I plugged my iPhone headphones back in and now auto-magically the sound is balanced again. . .
Very strange. I checked the really obvious stuff before by making sure it was all the way in the jack. . and that the cable didn't have a short in it.
Looks like there are still some gremlins in the code.
Thanks Anyway,
AP
Message was edited by: Apple pHr34k

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Regards,
Vicky Liu
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Vicky Liu
TechNet Community Support

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                StrExist = Convert.ToString(DBtable.GetValue("U_SupExist", Row - 1)).Trim()
                If Row - 1 < DBtable.Rows.Count - 1 Or (Not (StrName.Equals(String.Empty) And StrUId.Equals(String.Empty) And (StrEnter.Equals(String.Empty) Or StrExist.Equals(String.Empty))) And (Row - 1 = DBtable.Rows.Count - 1)) Then
                    If (Not StrName.Equals(String.Empty)) And ((StrUId.Equals(String.Empty) Or StrEnter.Equals(String.Empty)) Or StrExist.Trim.Equals(String.Empty)) Then
                        SBO_Application1.StatusBar.SetText("Invalid values provided!Blank values not vllowed", SAPbouiCOM.BoMessageTime.bmt_Short, SAPbouiCOM.BoStatusBarMessageType.smt_Error)
                        BubbleEvent = False
                        Exit Sub
                    End If
                    For ii = Row To DBtable.Rows.Count - 1
                        If Convert.ToString(DBtable.GetValue("ColName", ii)).Trim().Equals(StrName.Trim()) Then
                            SBO_Application1.StatusBar.SetText("Invalid Allowance ID: Duplication Not Allowed", SAPbouiCOM.BoMessageTime.bmt_Short, SAPbouiCOM.BoStatusBarMessageType.smt_Error)
                            oForm.Mode = SAPbouiCOM.BoFormMode.fm_UPDATE_MODE
                            BubbleEvent = False
                            Exit Sub
                        End If
                    Next
                    If CDbl(StrName) < 0 Then
                        SBO_Application1.StatusBar.SetText("Invalid values provided!Blank values not vllowed", SAPbouiCOM.BoMessageTime.bmt_Short, SAPbouiCOM.BoStatusBarMessageType.smt_Error)
                        BubbleEvent = False
                        Exit Sub
                    End If
                End If
            Next Row
        Catch ex As Exception
            SBO_Application1.MessageBox(ex.Message)
        End Try
    End Sub

Hello there
sir i want to Add Update and delete these three basic operation onto the Matrix, Sir u game me a Sample code of Delete a specific Column...
Sir can u do me a favour pls leave every thing n just told me how to update a matrix ,like i have to fill the matrix field through the DATABASE table now i want to update the DataBase table from the matrix..
i just only know thta i have to fill back database table with the help of FLUSHTODATABASE()
here is my Sample Code...n i have to update in the validate portion...
Public Sub HandleEventts_Allowance(ByVal FormUID As String, ByRef pVal As SAPbouiCOM.ItemEvent, ByRef EventEnum As SAPbouiCOM.BoEventTypes, ByRef BubbleEvent As Boolean)
        Try
            Dim oCellValue As SAPbouiCOM.EditText
            If FormUID.Equals("Allowance") Then
                If (pVal.ItemUID = "MatAllow") Then
                    If pVal.Row = 0 Then Exit Sub
                    o_Matrix = SBO_Application1.Forms.Item(FormUID).Items.Item("MatAllow").Specific
                    If (pVal.Row > o_Matrix.RowCount) Then Exit Sub
                    oForm = SBO_Application1.Forms.Item(FormUID)
                    If (pVal.ItemUID = "1" Or EventEnum = SAPbouiCOM.BoEventTypes.et_CLICK) Then
                        o_Matrix = SBO_Application1.Forms.Item(FormUID).Items.Item("MatAllow").Specific
                        If pVal.ColUID = "ColName" And pVal.BeforeAction = True Then
                            If pVal.Row = 0 Then Exit Sub
                            oCellValue = CType(o_Matrix.Columns.Item(pVal.ColUID).Cells.Item(pVal.Row).Specific(), SAPbouiCOM.EditText)
                            If (oCellValue.Value.Trim().Equals(String.Empty) And o_Matrix.RowCount <> pVal.Row) Then
                                SBO_Application1.StatusBar.SetText("Invalid Allowance ID: Blank Value Not Allowed", )
                                oCellValue.Active = True
                                BubbleEvent = False
                                Exit Sub
                            End If
                        End If
                    End If
                End If
            End If
            Validate(pVal, EventEnum, FormUID, BubbleEvent)
        Catch ex As Exception
            SBO_Application1.MessageBox(ex.Message)
        End Try
    End Sub
Public Sub Validate(ByRef pval As SAPbouiCOM.ItemEvent, ByRef EventEnum As SAPbouiCOM.BoEventTypes, ByVal FormUID As String, ByRef BubbleEvent As Boolean)
        Dim str, str1 As String
        Dim checkbox1, Checkbox2 As SAPbouiCOM.CheckBox
        Dim o_Matrix As SAPbouiCOM.Matrix
        Dim Sum As Integer
        Dim oRecordset As SAPbobsCOM.Recordset
        Dim Container As Integer
        Dim Count As Int32
        o_Matrix = SBO_Application1.Forms.Item(FormUID).Items.Item("MatAllow").Specific
        oRecordset = o_CompanyObj.GetBusinessObject(SAPbobsCOM.BoObjectTypes.BoRecordset)
        Try
            For Count = 0 To DBtable.Rows.Count - 1
                CodeFill = Convert.ToString(DBtable.GetValue("Name", Count).Trme())
                NameID = Convert.ToString(DBtable.GetValue("ColUID", Count).Trim())
                Price = Convert.ToString(DBtable.GetValue("ColPrice", Count).Trim())
                Quantity = Convert.ToString(DBtable.GetValue("ColQuant", Count).Trim())
                Total = Convert.ToString(DBtable.GetValue("ColTotal", Count).Trim())
                checkbox1 = o_Matrix.Columns.Item("ColSEnter").Cells.Item(Count).Specific
                Checkbox2 = o_Matrix.Columns.Item("ColSExist").Cells.Item(Count).Specific
                If (checkbox1.Checked = True) And (Checkbox2.Checked = True) Then
                    Dim Sql As String
                    Sql = "Update [@Supplier] Set U_Price=' " & Price & " ',U_ID=" & NameID & "Where Name ='" & CodeFill & " '"
                    oRecordset.DoQuery(Sql)
                End If
            Next Count
            SBO_Application1.MessageBox("Record was Updated")
        Catch ex As Exception
            SBO_Application1.MessageBox(ex.Message)
        End Try
    End Sub

Display image in full screen canvas

Hi frndz
I have an Image, which either bigger in size of a canvas or small
I want to give an option of a full screen view
So its a kind of zoomIn/ zoomOut function in one method
how can I convert such small/big images into full screen canvas size
thanks
alpesh

This question has been asked already several times here: http://onesearch.sun.com/search/onesearch/index.jsp?qt=resizing+image&subCat=siteforumid%3Ajava76&site=dev&dftab=siteforumid%3Ajava76&chooseCat=javaall&col=developer-forums
There is no method in MIDP which rescales a picture for you, so you have to write it on your on (or use existing code). But usually this would be pretty slow. Mostly it is better to offer different versions of your application for different devices (screen resolutions) where the images have already the appropriate size within your jar-file.

在canvas中如果设置了matrix(其值不为(1,0,0,1,0,0)),然后使用fillText绘制文本时,绘制出来的文本的字符间距不正确

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