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Serge_G

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About Serge_G

  • Birthday 06/29/1956

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  • Delphi-Version
    Delphi 10.3 Rio

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  1. Serge_G

    Vcl to Fmx

    My preference goes to Grid rather than StringGrid, but I prefer a ListView Agree sjordi, VCL components are poor if you compare. i.e a VCL app use Tpanel, a FMX app will use Layout or TRectangle
  2. Serge_G

    TListView first and last item visible

    IMHO if your listview only have items not resized you can use ScrollViewPos property and perhaps the ScrollViewChange event var first, last : integer; begin first:=Trunc(listview1.ScrollViewPos/listview1.ItemAppearance.ItemHeight); Last:=First+Trunc(ListView1.Height/listview1.ItemAppearance.ItemHeight); memo1.lines.add(Format('First %d Last %d',[first,last])); If you have a TSearchbox visible I think it's easy to take care of it (using Searchbox unit to get the height) If you have groups or variable height items this should be harder but still using ScrollViewPos I think it's playable, you "just" have to calc from top, cumulate all items height till reaching ScrollViewPos for first and ScrollViewPos+ListView.Height for last
  3. Serge_G

    TListView Paging

    Hi, Well, logic, yes. Depending on the REST API server function. On another side a TListview (livebinded) for only 10 records a VerticalScrollbox filled by code should be a good alternative, IMO getting previous page and next page (30 records) during thread process should be better
  4. Serge_G

    FMX TListView with dynamicappearance. Create progress bar as bitmap.

    Hi Sorry but, I think we don't play in the same playground. For me, a TListView is used with Livebindings to fill it with data coming from a data source (table, query or list of Object). You use it like a TListBox! With a TListBox it's easy to put in a style whatever you want (in this case a text and a progress bar). By the way, your code is more for this kind of component, Create a style (layout, ttext, progressbar) just to adapt your code in the "for FR in FArray do" loop set the style of the created item item.stylelookup:='mystyleprogress' insert an item.applystylelookup change access to the objects of the item
  5. Serge_G

    FMX TListView with dynamicappearance. Create progress bar as bitmap.

    Hi, if you mean something like this (my first try) I use this code unit UnitProgess; interface uses System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants, FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs, FMX.ListView.Types, FMX.ListView.Appearances, FMX.ListView.Adapters.Base, Data.Bind.GenData, System.Rtti, System.Bindings.Outputs, FMX.Bind.Editors, Data.Bind.EngExt, FMX.Bind.DBEngExt, Data.Bind.Components, Data.Bind.ObjectScope, FMX.ListView, Fmx.Bind.GenData; type TForm18 = class(TForm) ListView1: TListView; PrototypeBindSource1: TPrototypeBindSource; BindingsList1: TBindingsList; LinkListControlToField1: TLinkListControlToField; procedure ListView1UpdateObjects(const Sender: TObject; const AItem: TListViewItem); private { Déclarations privées } public { Déclarations publiques } end; var Form18: TForm18; implementation {$R *.fmx} procedure TForm18.ListView1UpdateObjects(const Sender: TObject; const AItem: TListViewItem); var pBitMap: TBitmap; // for further purpose pListItemImage : TListItemImage; begin if AItem.Purpose = TListItemPurpose.None then begin pListItemImage:=AItem.Objects.FindObjectT<TListItemImage>('ProgressBar'); if assigned(pListItemImage) then begin pListItemImage.Bitmap.Width:=400-(abs(PrototypeBindSource1.DataGenerator.FindField('intfield1').GetTValue.AsInteger)*10); pListItemImage.Bitmap.Clear(Talphacolors.RED); end; end; end. Quick designed But I shall investigate more because this "version" need a link to (bitmap1 -> Item.ProgressBar) I was enabled to add a bitmap directly (PlistItemImage is unassigned if there is no link)
  6. Serge_G

    Getting bitmap from an ImageList source

    Take in mind that in the another imagelist (let say the source one) I have various images and the goal is to have the destination list filled with only one of these. I found the problem deeply looking in the code used in the helper. (helper I merged) uses FMX.MultiResBitmap; procedure TForm18.Button1Click(Sender: TObject); const SCALE = 1; var pBitmap : TBitmap; sbitmap : TCustomBitmapItem; vSource: TCustomSourceItem; vBitmapItem: TCustomBitmapItem; vDest: TCustomDestinationItem; vLayer: TLayer; begin Images.ClearCache; Images.BeginUpdate; if Images.Destination.Count > 0 then Images.Destination.Clear; vSource := ImageList1.Source.Items[0]; sbitmap := vSource.MultiResBitmap.ItemByScale(SCALE, True, True); pbitmap:=TBitmap.Create(100,100); try for var l := 0 to 3 do for var c := 0 to 3 do begin var r: TRect := TRect.Create(100*c,100* l, 100*c+100,100*l+100); pBitmap.CopyFromBitmap(sbitmap.Bitmap, r, 0, 0); // add source bitmap vSource := Images.Source.Add; vSource.MultiResBitmap.TransparentColor := TColorRec.Fuchsia; vSource.MultiResBitmap.SizeKind := TSizeKind.Source; vSource.MultiResBitmap.Width := Round(pBitmap.Width / SCALE); vSource.MultiResBitmap.Height := Round(pBitmap.Height / SCALE); vBitmapItem := vSource.MultiResBitmap.ItemByScale(SCALE, True, True); if vBitmapItem = nil then begin vBitmapItem := vSource.MultiResBitmap.Add; vBitmapItem.SCALE := SCALE; end; vBitmapItem.Bitmap.Assign(pBitmap); vDest := Images.Destination.Add; vLayer := vDest.Layers.Add; vLayer.SourceRect.Rect := TRectF.Create(TPoint.Zero, vSource.MultiResBitmap.Width, vSource.MultiResBitmap.Height); vLayer.Name := vSource.Name; end; finally pBitmap.Free; end; Images.EndUpdate; end; And now I can play
  7. Hi I am trying to split an Image stored in a first TImageList into a second TImageList all my attempts to access a multiresbitmap contained in a TImagelist show an error on program exit TImageListHelper = class helper for TImageList function Add(aBitmap: TBitmap): integer; end; var Form18: TForm18; implementation {$R *.fmx} uses FMX.MultiResBitmap; procedure TForm18.Button1Click(Sender: TObject); var sbitmap, pBitmap: TBitmap; vSource: TCustomSourceItem; vBitmapItem: TCustomBitmapItem; vDest: TCustomDestinationItem; begin Images.ClearCache; Images.BeginUpdate; if Images.Destination.Count > 0 then Images.Destination.Clear; vSource := ImageList1.Source.Items[1]; vBitmapItem := vSource.MultiResBitmap.ItemByScale(1, True, True); sbitmap := vBitmapItem.Bitmap; pBitmap := TBitmap.Create(100, 100); try for var l := 0 to 3 do for var c := 0 to 3 do begin var r: TRect := TRect.Create(pBitmap.Width * c, pBitmap.Height * l, pBitmap.Width * c + pBitmap.Width, pBitmap.Height * l + pBitmap.Height); pBitmap.CopyFromBitmap(sbitmap, r, 0, 0); Images.Add(pBitmap); end; finally pBitmap := nil; // if not an EAccessViolation exception raised when program close pBitmap.Free; end; Images.EndUpdate; end; { TImageListHelper } function TImageListHelper.Add(aBitmap: TBitmap): integer; const SCALE = 1; var vSource: TCustomSourceItem; vBitmapItem: TCustomBitmapItem; vDest: TCustomDestinationItem; vLayer: TLayer; begin result := -1; if (aBitmap.Width = 0) or (aBitmap.Height = 0) then exit; // add source bitmap vSource := Source.Add; vSource.MultiResBitmap.TransparentColor := TColorRec.Fuchsia; vSource.MultiResBitmap.SizeKind := TSizeKind.Source; vSource.MultiResBitmap.Width := Round(aBitmap.Width / SCALE); vSource.MultiResBitmap.Height := Round(aBitmap.Height / SCALE); vBitmapItem := vSource.MultiResBitmap.ItemByScale(SCALE, True, True); if vBitmapItem = nil then begin vBitmapItem := vSource.MultiResBitmap.Add; vBitmapItem.SCALE := SCALE; end; vBitmapItem.Bitmap.Assign(aBitmap); vDest := Destination.Add; vLayer := vDest.Layers.Add; vLayer.SourceRect.Rect := TRectF.Create(TPoint.Zero, vSource.MultiResBitmap.Width, vSource.MultiResBitmap.Height); vLayer.Name := vSource.Name; result := vDest.Index; end; AccessViolation if pbitmap:=nil is omitted >>EAccessViolation exception in module taKinFMX.exe in 00008338 >>Violation of access to the address 00408338 in the module 'taKinFMX.exe'. Reading of the address FFFFFFFC. ... >> The instruction at 0x0000000000408338 uses the memory address 0x00000000FFFFFFFC. Memory state cannot be read. and cause Unexpected Memory Leaks An unexpected memory leak has occurred. The unexpected small block leaks are: 29 - 36 bytes: TD2DBitmapHandle x 1, TBitmapImage x 1 45 - 52 bytes: TBitmap x 1 61 - 68 bytes: Unknown x 1 Where does I go wrong ? Is there another way to split (like during design time) an image ?
  8. Good thing to report it another time because I don't know if EMB report RSP of a version to another one (hope so but ...), even if you should have a "closed : duplicate case" (I'm used to this kind of response when I report one) Yes, there are quite some but decreasing (even if I don't use 10.4 for production, I should make another try with 10.4.2 when I'll be a little less busy). My idea for IDE crashes : LSP is a good thing but need memory, more than 4Mo I recommend 8 minima (I will soon make my HP laptop open-heart surgery to 16 I think) Still mine, and now I am a FMX, LiveBindings fan, all my new desktop pro applications (even if Windows only) are FMX, but the first steps were hard!
  9. Serge_G

    Client Data Set FILTER

    Hi, For me, filter expressions complies only with the old LocalSQL of BDE so no STARTS nor CONTAINING. Usually, I don't use tables, only querys to avoid this problem, and some Query data components have the good idea to offer macros to manage this sort of case
  10. Hi, It's a known and reported bug RSP-16453, till your post I had no idea of this one No idea, except modifying unit containing TWinAcceleratorKeyRegistry
  11. Serge_G

    TListView and Stylebook on 10.4

    I should not be so affirmative. @MarkShark it's a FMX.TListView not a VCL one. @Michele If you think : style of an item like for a FMX.TListBox, yes you can't change Item style. You can only change Appearance and only use one for all the list, The Dynamic appearance is one of the most adaptable. if you think : changing background colors you can You can see above a personalized style, quick done, I only change itembackground.Color and buttontext.Color (listviewappearance = ImageListItemRightButton)
  12. It's a "business layer" so I should say DataModule and perhaps TDataSource on Form Agree with haentschman but "Like" can't be "parametrized". Anyway you have the macro solution https://www.devart.com/mydac/docs/devart.dac.tcustomdadataset.macros.htm So your query should be like this Select * from <tablename> &where and the code and this should respond your second interrogation (you can even use a macro for table name Query.SQl.Text := 'select Bla from Bubb &where' Query.MacroByName('where').AsString := Format('WHERE FIELD1 LIKE %s AND FIELD2 LIKE %s',[QuotedStr('%'+value1+'%'),QuotedStr('%'+value2+'%')]); Query.Open;
  13. Serge_G

    TListView different background color for each item

    It depends on whether you are using a dynamic skin or not. I wrote a few posts and tutorials (in French) on the subject. Anyway if you can't read French, googletrad should be your friend blog : https://www.developpez.net/forums/blogs/138527-sergiomaster/ tutorials list : https://serge-girard.developpez.com/ in my mind this one https://serge-girard.developpez.com/tutoriels/Delphi/Livebindings/ListView/
  14. Serge_G

    fmx grid error

    Hi, I was afraid of, but no, I wrote a quick test (I don't use Grid often) and my conclusion is : no problem found.
  15. Hi, Maybe this is the same problem as arabic, a font problem and not a database problem. I don't remember in which post I saw that, but I remember changing some emb. units did the trick for arabic. ( changing those 3 files FMX.TextLayout.GPU, FMX.FontGlyphs and FMX.FontGlyphs.Android. )
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