I would like to show in a DBGRID as follows:
Imagine "Grid" as follows:
ID - DESCRIPTION
1 - Line 1 of the grid
2 - Line 2 of the grid
3 - Line 3 of the grid
Now, suppose the size of the DESCRIPTION column is changed and no longer appear the words "GRID";
I would like to stay as well DBGRID
ID - DESCRIPTION
1 - Line 1 of the
grid
2 - Line 2 of the
grid
3 - Line 3 of the
grid
is there any possibility that ??
Not what you're asking, but might help... I once used this code to show complete Memo fields in the standard DBGrid:
TMyForm = class(TForm)
...
private
FormMemoRect: TRect;
MemoGrid: TDBGrid;
BMemo: TBitBtn;
...
Procedure TMyForm.FormMemoDeactivate(Sender: TObject);
Begin
(Sender As TForm).Close;
Sender.Free;
End;
Procedure TMyForm.BMemoClick(Sender: TObject);
Var FormMemo: TForm;
Begin
MemoGrid.SetFocus;
FormMemo := TForm.Create(Self);
With TMemo.Create(FormMemo) Do Begin
Parent := FormMemo;
Align := alClient;
ReadOnly := True;
WordWrap := True;
ScrollBars := ssVertical;
Lines.Text := MemoGrid.DataSource.DataSet.Fields[TComponent(Sender).Tag].AsString;
End;
With FormMemo Do Begin
OnDeactivate := FormMemoDeactivate;
Left := FormMemoRect.Left;
Top := FormMemoRect.Top;
Width := Max(FormMemoRect.Right - FormMemoRect.Left, 300);
Height := FormMemoRect.Bottom - FormMemoRect.Top;
BorderStyle := bsNone;
Show;
End;
End;
Procedure TMyForm.GrdMemoDrawColumnCell(Sender: TObject; Const Rect: TRect; DataCol: Integer; Column: TColumn; State: TGridDrawState);
Begin
If (gdFocused In State) Then Begin
If Column.Field.DataType In [ftBlob, ftMemo] Then Begin
{Desenha botão para visualização do Memo}
FormMemoRect.Left := TWinControl(Sender).ClientToScreen(Rect.TopLeft).X;
FormMemoRect.Right := TWinControl(Sender).ClientToScreen(Rect.BottomRight).X;
FormMemoRect.Top := TWinControl(Sender).ClientToScreen(Rect.BottomRight).Y;
FormMemoRect.Bottom := FormMemoRect.Top + 100;
If Not Assigned(BMemo) Then
BMemo := TBitBtn.Create(Self);
BMemo.Parent := TWinControl(Sender).Parent;
BMemo.Width := 16;
BMemo.Height := 16;
BMemo.Caption := '...';
BMemo.OnClick := BMemoClick;
BMemo.Tag := Column.Field.Index;
BMemo.Left := TWinControl(Sender).Left + Rect.Right - BMemo.Width + 1;
BMemo.Top := TWinControl(Sender).Top + Rect.Top + 2;
MemoGrid := TDBGrid(Sender);
End
Else
FreeAndNil(BMemo);
End;
End;
For Blob/Memo Fields, you may also find it useful to do some custom GetText to show something directly in the Grid:
Procedure TMyForm.DataSetMemoGetText(Sender: TField; var Text: String; DisplayText: Boolean);
Begin
Text := Copy(Sender.AsString, 1, 50);
If Text <> Sender.AsString Then
Text := Text + '...';
End;
This is how the result looks like.
PS: Sorry for non-standard code style.
I've searched this question and found this.
so, I wrote a OnApplyStyleLookup event handler like this:
procedure TForm1.StringGrid1ApplyStyleLookup(Sender: TObject);
var
Header: THeader;
I: Integer;
begin
Header := THeader((Sender as TStringGrid).FindStyleResource('header'));
if Assigned(Header) then
begin
for I := 0 to Header.Count - 1 do
with Header.Items[I].Font do
begin
Header.Items[I].TextSettings.HorzAlign := TTextAlign.Center;
Size := 100;
Style := [TFontStyle.fsBold];
// SetSettings('Arial', 100, [TFontStyle.fsBold]);
end;
Header.Height := 48;
end;
// TStringGrid(Sender).Realign;
end;
text align is changed, but font size and style are not applied.
I'm using XE7.
For apply changed text style, you must set StyledSettings property for changed object.
So, final code looks like this (i dont like with operator)
procedure TForm1.StringGrid1ApplyStyleLookup(Sender: TObject);
var
Header: THeader;
HeaderItem: THeaderItem;
I: Integer;
begin
Header := THeader((Sender as TStringGrid).FindStyleResource('header'));
if Assigned(Header) then
begin
for I := 0 to Header.Count - 1 do
begin
HeaderItem := Header.Items[I];
HeaderItem.Font.Size := 100;
HeaderItem.Font.Style := [TFontStyle.fsBold];
HeaderItem.TextSettings.HorzAlign := TTextAlign.Center;
// new code line:
HeaderItem.StyledSettings := HeaderItem.StyledSettings - [TStyledSetting.Size, TStyledSetting.Style];
end;
Header.Height := 48;
end;
end;
i wanto dynamic add 5 TLable in my iOS app.
like this
Procedure Form1.FormCreate(Sender: TObject)
var
I: Integer;
begin
for I := 1 to 5 do
begin
with TLabel.Create(Self) do
begin
Parent := self;
Align := TAlignLayout.Top;
Height := 50;
Text := IntToStr(I);
end;
end;
end;
i think the order is 12345, but I get 15432.
What can I do to get the desired results?
You must give a chance to the aligning algorithm to do what you want.
procedure TForm1.FormCreate(Sender: TObject);
var
I: Integer;
begin
for I := 1 to 5 do
begin
with TLabel.Create(Self) do
begin
Parent := self;
Align := TAlignLayout.alTop;
Height := 50;
Position.Y := I*Height; //add this line
Text := IntToStr(I);
end;
end;
end;
I've wrote a TDBGrid descendant component which is displaying the content of different blob fields for the current row selected, each one in a TJvDBRichEdit. The DrawColumnCell code for displaying the content of the blob fields:
procedure TMyDBGrid.DrawColumnCell(const Rect: TRect; DataCol: Integer; Column: TColumn; State: TGridDrawState);
var iPos,iNr,iTop:Integer;
begin
// RBA 01/04/2013 12:10
if not (csDesigning in ComponentState) then
if FDisplayBlobAsRTF then //property to show the blob fields or not
begin
if (gdSelected in State) then
begin
if Column.Field.isblob then
begin
ipos := 0;
iNr := 0;
while (iPos <= Column.Field.DataSet.FieldCount-1)and(Column.Field.DataSet.Fields[ipos].FieldName <> Column.Field.FieldName ) do
begin
if Column.Field.DataSet.Fields[ipos].IsBlob then
inc(iNr);
inc(iPos);
end;
with TJvDBRichEdit(FRichEditList[inr]) do//FRichEditList - TObjectList which contains all the TJvDBRichEdit components, and release them on destroy
begin
Left := Rect.Left + Self.Left + 1;
iTop := Rect.Top + Self.Top + 1;
if iTop + Height > Self.Height then
iTop := iTop - Height;
Top := iTop;
Width := Rect.BottomRight.X - Rect.left;
Visible := true;
end;
end;
end
end;
inherited;
end;
overrided LayoutChanged routine
procedure TMyDBGrid.LayoutChanged;
var iPos : Integer;
dtDataset : TDataSet;
jvDbRichEdit : TJvDBRichEdit;
begin
if not (csDesigning in ComponentState) then
if FDisplayBlobAsRTF then
begin
dtDataset := GetDataset;//get the dataset assigned to the grid
if dtDataset <> nil then
if dtDataset.State <> dsInactive then
begin
FRichEditList.Clear;
for iPos := 0 to dtDataset.FieldCount-1 do
if dtDataset.Fields[iPos].IsBlob then
begin
jvDbRichEdit := TJvDBRichEdit.Create(nil);
jvDbRichEdit.Parent := Self;
jvDbRichEdit.DataSource := Self.DataSource;
jvDbRichEdit.DataField := dtDataset.Fields[iPos].FieldName;
jvDbRichEdit.Visible := false;
FRichEditList.Add(jvDbRichEdit);
end;
end;
end;
end;
the problem appears when I make a scroll on the last displayed grid row :
How can I redraw the grid behind? I've tried with repainting the hole grid, but it is flickering.
LE: this is not intended to modify the content in the richedtis, only to display them.
I am trying to display a table using ShowMessage that looks like this:
short | Description for "short"
verylongtext | Description for "verylongtext"
How do I get two correctly aligned columns like that in a simple message dialog?
I tried to align the columns using spaces, but the font of ShowMessage is variable. Then I tried to align them using tab characters, but I do not know how to calculate the proper tab count for each row.
Is there a reliable way to calculate the tab count?
PS: I would like to avoid writing a custom dialog for this purpose.
You could use a list view in a custom dialog box, as well.
My class supports the standard Windows icons (and sounds): information, warning, error, confirmation, none. Here is the icon-less version:
It is easy to use:
TTableDialog.ShowTable
(
Self,
'Audio Properties',
['Duration', 'Samples per channel', 'Total data size', 'Channels', 'Bits per sample', 'Sample rate', 'Bitrate'],
['1 h 15 min 0 s', '216 000 000', '824 MB', '1', '32', '48 kHz', '1 536 kbit/sec'],
mtInformation
)
It supports DPI scaling (high DPI) and all Windows versions from Windows XP (it might work on Windows 2000 as well, I just haven't tested that) to Windows 10:
The table is a list view, so you get all its benefits, like a scrollbar, truncation ellipses, and tooltips:
You can also specify the dialog's size to make it fit the contents:
TTableDialog.ShowTable
(
Self,
'Audio Properties',
['Duration', 'Samples per channel', 'Total data size', 'Channels', 'Bits per sample', 'Sample rate', 'Bitrate', 'Maximum fractional sample value'],
['1 h 15 min 0 s', '216 000 000', '824 MB', '1', '32', '48 kHz', '1 536 kbit/sec', '0.1'],
mtInformation,
360,
240
)
Of course, the OK button is both Default and Cancel, so you can dismiss the dialog with Enter or Escape.
Finally, pressing Ctrl+C will copy the table to clipboard.
Full source code:
uses
ComCtrls, Math, Clipbrd;
type
TTableDialog = class
strict private
type TFormData = class(TComponent)
public
ListView: TListView;
IconKind: PWideChar;
Icon: HICON;
LIWSD: Boolean;
end;
class function Scale(X: Integer): Integer;
class procedure FormShow(Sender: TObject);
class procedure FormDestroy(Sender: TObject);
class procedure FormPaint(Sender: TObject);
class procedure FormKeyPress(Sender: TObject; var Key: Char);
class procedure LVToClipboard(AListView: TListView);
public
class procedure ShowTable(AOwner: TCustomForm; const ACaption: string;
const ANames, AValues: array of string;
ADialogType: TMsgDlgType = mtInformation;
const AWidth: Integer = 360; const AHeight: Integer = 200);
end;
class procedure TTableDialog.FormShow(Sender: TObject);
var
FormData: TFormData;
ComCtl: HMODULE;
LoadIconWithScaleDown: function(hinst: HINST; pszName: LPCWSTR; cx: Integer;
cy: Integer; var phico: HICON): HResult; stdcall;
begin
if not (Sender is TForm) then
Exit;
if not (TObject(TForm(Sender).Tag) is TFormData) then
Exit;
TForm(Sender).OnShow := nil;
FormData := TFormData(TForm(Sender).Tag);
if FormData.IconKind = nil then
Exit;
ComCtl := LoadLibrary('ComCtl32.dll');
if ComCtl <> 0 then
begin
try
LoadIconWithScaleDown := GetProcAddress(ComCtl, 'LoadIconWithScaleDown');
if Assigned(LoadIconWithScaleDown) then
FormData.LIWSD := Succeeded(LoadIconWithScaleDown(0, FormData.IconKind,
Scale(32), Scale(32), FormData.Icon));
finally
FreeLibrary(ComCtl);
end;
end;
if not FormData.LIWSD then
FormData.Icon := LoadIcon(0, FormData.IconKind);
end;
class procedure TTableDialog.FormDestroy(Sender: TObject);
var
FormData: TFormData;
begin
if not (Sender is TForm) then
Exit;
if not (TObject(TForm(Sender).Tag) is TFormData) then
Exit;
FormData := TFormData(TForm(Sender).Tag);
if (FormData.Icon <> 0) and FormData.LIWSD then
DestroyIcon(FormData.Icon);
end;
class procedure TTableDialog.FormKeyPress(Sender: TObject; var Key: Char);
var
FormData: TFormData;
begin
if not (Sender is TForm) then
Exit;
if not (TObject(TForm(Sender).Tag) is TFormData) then
Exit;
FormData := TFormData(TForm(Sender).Tag);
case Key of
^C:
LVToClipboard(FormData.ListView);
end;
end;
class procedure TTableDialog.FormPaint(Sender: TObject);
var
FormData: TFormData;
Frm: TForm;
Y: Integer;
begin
if not (Sender is TForm) then
Exit;
if not (TObject(TForm(Sender).Tag) is TFormData) then
Exit;
Frm := TForm(Sender);
FormData := TFormData(TForm(Sender).Tag);
Y := Frm.ClientHeight - Scale(25 + 8 + 8);
Frm.Canvas.Brush.Color := clWhite;
Frm.Canvas.FillRect(Rect(0, 0, Frm.ClientWidth, Y));
Frm.Canvas.Pen.Color := $00DFDFDF;
Frm.Canvas.MoveTo(0, Y);
Frm.Canvas.LineTo(Frm.ClientWidth, Y);
if FormData.Icon <> 0 then
DrawIconEx(Frm.Canvas.Handle, Scale(8), Scale(8), FormData.Icon,
Scale(32), Scale(32), 0, 0, DI_NORMAL);
end;
class procedure TTableDialog.LVToClipboard(AListView: TListView);
function GetRow(AIndex: Integer): string;
begin
if InRange(AIndex, 0, AListView.Items.Count - 1) and (AListView.Items[AIndex].SubItems.Count = 1) then
Result := AListView.Items[AIndex].Caption + #9 + AListView.Items[AIndex].SubItems[0]
else
Result := '';
end;
var
S: string;
i: Integer;
begin
if AListView = nil then
Exit;
S := GetRow(0);
for i := 1 to AListView.Items.Count - 1 do
S := S + sLineBreak + GetRow(i);
Clipboard.AsText := S;
end;
class function TTableDialog.Scale(X: Integer): Integer;
begin
Result := MulDiv(X, Screen.PixelsPerInch, 96);
end;
class procedure TTableDialog.ShowTable(AOwner: TCustomForm; const ACaption: string;
const ANames, AValues: array of string;
ADialogType: TMsgDlgType = mtInformation;
const AWidth: Integer = 360; const AHeight: Integer = 200);
const
Sounds: array[TMsgDlgType] of Integer =
(MB_ICONWARNING, MB_ICONERROR, MB_ICONINFORMATION, MB_ICONQUESTION, 0);
Icons: array[TMsgDlgType] of MakeIntResource =
(IDI_WARNING, IDI_ERROR, IDI_INFORMATION, IDI_QUESTION, nil);
var
dlg: TForm;
lv: TListView;
btn: TButton;
i: Integer;
snd: Integer;
begin
if Length(ANames) <> Length(AValues) then
raise Exception.Create('The lengths of the columns don''t match.');
dlg := TForm.Create(AOwner);
try
dlg.BorderStyle := bsDialog;
dlg.Caption := ACaption;
dlg.Width := Scale(AWidth);
dlg.Height := Scale(AHeight);
dlg.Position := poOwnerFormCenter;
dlg.Scaled := False;
dlg.Font.Name := 'Segoe UI';
dlg.Font.Size := 9;
dlg.Tag := NativeInt(TFormData.Create(dlg));
TFormData(dlg.Tag).IconKind := Icons[ADialogType];
dlg.OnShow := FormShow;
dlg.OnDestroy := FormDestroy;
dlg.OnPaint := FormPaint;
dlg.OnKeyPress := FormKeyPress;
dlg.KeyPreview := True;
btn := TButton.Create(dlg);
btn.Parent := dlg;
btn.Caption := 'OK';
btn.Default := True;
btn.Cancel := True;
btn.ModalResult := mrOk;
btn.Width:= Scale(75);
btn.Height := Scale(25);
btn.Left := dlg.ClientWidth - btn.Width - Scale(8);
btn.Top := dlg.ClientHeight - btn.Height - Scale(8);
lv := TListView.Create(dlg);
TFormData(dlg.Tag).ListView := lv;
lv.Parent := dlg;
lv.DoubleBuffered := True;
lv.ReadOnly := True;
lv.BorderStyle := bsNone;
lv.Left := Scale(8) + IfThen(Icons[ADialogType] <> nil, Scale(32 + 8));
lv.Top := Scale(8);
lv.Width := dlg.ClientWidth - Scale(16) - IfThen(Icons[ADialogType] <> nil, Scale(32 + 8));
lv.Height := dlg.ClientHeight - Scale(16 + 8 + 4) - btn.Height;
lv.ViewStyle := vsReport;
lv.RowSelect := True;
lv.ShowColumnHeaders := False;
with lv.Columns.Add do
begin
Caption := 'Name';
Width := Scale(150);
end;
with lv.Columns.Add do
begin
Caption := 'Value';
Width := lv.ClientWidth - lv.Columns[0].Width -
GetSystemMetricsForWindow(SM_CXVSCROLL, dlg.Handle) - scale(2);
end;
for i := 0 to High(ANames) do
with lv.Items.Add do
begin
Caption := ANames[i];
SubItems.Add(AValues[i]);
end;
snd := Sounds[ADialogType];
if snd <> 0 then
MessageBeep(snd);
dlg.ShowModal;
finally
dlg.Free;
end;
end;
If you're not writing a custom dialog for this, when will you? It's not that hard. Just create a form, drop a TMemo on it and make that memo readonly. You can set a monospaced font like Courier New, and your problem is solved. You got the advantage of scrollbars and selection too, and you can choose to make it non-modal.
I would even recommend showing this type of data in a grid (like TStringGrid) instead of a memo or label.
Calculating how to display this text in a messagebox will require much more effort than just creating a custom dialog.
Just created something that shows a popup like this:
Just call the procedure below, and add a TStringList as a parameter.
Of course you could pimp this by using a TListView, icons, scrollbars, etc.
Put it in a separate unit, and you'll always be able to easily show stuff like this.
uses ..., StdCtrls, ExtCtrls;
procedure ShowTablePopup(SL:TStringList);
var
LButtonOK: TButton;
LMemo: TMemo;
LPanel: TPanel;
LForm: TForm;
begin
LForm := TForm.Create(Application);
LMemo := TMemo.Create(LForm);
LPanel := TPanel.Create(LForm);
LButtonOK := TButton.Create(LForm);
LForm.Left := 0;
LForm.Top := 0;
LForm.Caption := 'Values';
LForm.ClientHeight := 250;
LForm.ClientWidth := 400;
LMemo.Parent := LForm;
LMemo.AlignWithMargins := True;
LMemo.Left := 3;
LMemo.Top := 3;
LMemo.Width := 295;
LMemo.Height := 226;
LMemo.Align := alClient;
LMemo.Font.Name := 'Courier New';
LMemo.Lines.Assign(SL);
LPanel.Parent := LForm;
LPanel.Caption := '';
LPanel.Left := 0;
LPanel.Top := 232;
LPanel.Width := 301;
LPanel.Height := 37;
LPanel.Align := alBottom;
LPanel.BevelOuter := bvNone;
LButtonOK.Parent := LPanel;
LButtonOK.AlignWithMargins := True;
LButtonOK.Left := 223;
LButtonOK.Top := 3;
LButtonOK.Width := 75;
LButtonOK.Height := 31;
LButtonOK.Align := alRight;
LButtonOK.Caption := '&OK';
LButtonOK.ModalResult := mrOk;
LButtonOK.Default := True;
LForm.ShowModal;
end;
Example on how to use it:
var
SL:TStringList;
begin
SL := TStringList.Create;
try
SL.Add('short | Description for "short"');
SL.Add('verylongtext | Description for "verylongtext"');
ShowTablePopup(SL);
finally
SL.Free;
end;
end;