Is it possible to conditionally disable or hide edit boxes from a TInputQueryWizardPage input page (page created by using CreateInputQueryPage function) ?
I have 4 edit boxes and I need to disable/hide the last two of them, based on the input from the previous wizard page. How can I do it ?
You can access them through the TInputQueryWizardPage.Edits indexed property:
[Code]
var
FirstEditIndex: Integer;
SecondEditIndex: Integer;
InputPage: TInputQueryWizardPage;
procedure InitializeWizard;
begin
InputPage := CreateInputQueryPage(wpWelcome, 'Caption', 'Dscription', 'SubCaption');
// the Add method returns the Index of the just added edit box, and
// you need to store those indexes to access the edit boxes later on
FirstEditIndex := InputPage.Add('Name:', False);
SecondEditIndex := InputPage.Add('Surname:', False);
// access the edits through the stored indexes; in your case this will
// happen in the other event, so take this script as a showcase
InputPage.Edits[FirstEditIndex].Enabled := False;
InputPage.Edits[SecondEditIndex].Visible := False;
end;
Related
How to customize last page (wpFinished) to only have a message, but keep the bottom buttons, like this:
I don't want the image on the left that is there by default.
I was trying to create new page, but don't know how to hide the default finished page or add bottom buttons (Back, Finished, Cancel) on new page.
Hide the WizardBitmapImage2 control and extend remaining controls accordingly.
Something like this:
[Code]
procedure ExtendFinishedPageControl(Control: TControl);
begin
Control.Left := Control.Left - WizardForm.WizardBitmapImage2.Width;
Control.Width := Control.Width + WizardForm.WizardBitmapImage2.Width;
end;
procedure InitializeWizard();
begin
WizardForm.WizardBitmapImage2.Visible := False;
ExtendFinishedPageControl(WizardForm.RunList);
ExtendFinishedPageControl(WizardForm.NoRadio);
ExtendFinishedPageControl(WizardForm.YesRadio);
ExtendFinishedPageControl(WizardForm.FinishedLabel);
ExtendFinishedPageControl(WizardForm.FinishedHeadingLabel);
end;
I have a requirement to skip a page when only a particular component is selected in the component selection page. Please look at the below image
[Components]
Name: DBS\TRACE; Types: DBS TBLWOS; Description: DBS Tracing Bodylife Database;
The requirement is to skip a page when the option "DBS Tracing Bodylife Database" (highlighted in the image) alone is selected and clicked on Next button. If I select only that option, I am successfully able to skip the page using below code.
if PageID = PageToBeSkipped.ID then begin
Result := not (IsComponentSelected('not DBS\TRACE'));
end;
But If I select any other additional component along with the "DBS Tracing Bodylife Database" from this page which is nearly 20, the page should not be skipped. The above code skips the page if any additional component is selected too.
How can I handle this?
Thanks in advance!
To test if any component, except one specific, is selected, you can use WizardSelectedComponents function (which returns a comma-separated list of selected components).
function ShouldSkipPage(PageID: Integer): Boolean;
begin
Result := False;
if PageID = PageToBeSkipped.ID then
begin
Result := (CompareText(WizardSelectedComponents(False), 'DBS,DBS\TRACE') = 0);
end;
end;
Note that the WizardSelectedComponents returns even "partially" selected components groups.
I want to make a wizard. When the user choose yes, then the page x should follow. When the user choose no, then the page y should follow. At the moment it is only working for me with static pages, so it does not matter, what the user chooses always the same page follows... how can I change this? Please have somebody an idea?
Here is an extract:
ExistPage := CreateInputOptionPage(OldPage.ID,
'', '', 'If you choose "Yes" then the package will be installed automatically with this setup',True, False);
// Add items
ExistPage.Add('Yes');
ExistPage.Add('No');
// Set initial values (optional)
ExistPage.SelectedValueIndex := 0;
TexPage := CreateInputDirPage(ExistPage.ID,
'Root installation directory', 'Please select installation directory',
'',
True, 'New Folder');
TexPage.Add('');
// Set initial value (optional)
TexPage.Values[0] := ExpandConstant('C:\');
When you create your page you can store the page ID into a variable:
// InitializeWizard is called when the wizard is about to begin.
// This is where we add any custom pages into the installation process.
// The relevant XXX_CreatePage methods should be defined BEFORE this method.
procedure InitializeWizard();
begin
// Add the Application Settings page just after the Selected Tasks page
idAppSettingsPage := AppSettings_CreatePage(wpSelectTasks)
end;
If you were to cache the result of your users radio choice into a public variable then you might be able to use this:
function ShouldSkipPage(PageID: Integer): Boolean;
begin
// We don't want to show the select dir, select program group or application settings
// pages if we are upgrading.
if ((PageID = wpSelectDir) or (PageID = idAppSettingsPage) or (PageID = wpSelectProgramGroup)) then
Result := bIsUpgrading
else
Result := False;
end;
This is something I have used in my setup to selectively show pages during the install process. I am just not sure how you check for a custom page ID.
I am just showing the mechanics. If you know you are now about to show page Y, you can decide to show it if variable AA was set to 1. Make sense?
I have a TStringGrid in Lazarus, running on Linux. I have a column which has editor type cbsButton. I want the button to display a certain image, instead of an ellipsis. I have the following code, which causes an error:
procedure TForm1.streams_gridDrawCell(Sender: TObject; aCol, aRow: Integer; aRect: TRect; aState: TGridDrawState);
var
aCanvas: TCanvas;
aGrid: TStringGrid;
Editor: TWinControl;
image: TImage;
begin
if (aCol <> 1) or (aRow = 0) then begin
Exit;
end;
aGrid := (Sender as TStringGrid);
aCanvas := image.Canvas;
aCanvas.FillRect(aRect);
imagelist1.Draw(aCanvas, aRect.Left+2, aRect.Top+2, 8);
Editor := (aGrid.EditorByStyle(cbsButton) as TButtonCellEditor);
Editor.Brush.Style := TBrushStyle.bsImage;
(Editor.Brush.Image as TImage) := image; // causes the error below
end;
The error is:
mainform.pas(156,23) Error: Class or Object types "TFPCustomImage" and
"TImage" are not related
At this point, I'm sure I'm going about this in entirely the wrong way. Could someone please put me back on the right path?
I doubt that the OnDrawCell event is the correct place to modify a cell editor because probably the correct cell editor does not exist at this moment when the cell is painted.
The correct event to define the cell editor is the OnSelectEditor event of the grid. Please read the wiki (http://wiki.lazarus.freepascal.org/Grids_Reference_Page).
The cbsButton editor which you use inherits from TButton. A TButton does not have a Glyph property - you cannot assign a bitmap to the button. But can you write your own cell editor easily, just follow the standard example in examples/gridexamples/gridcelleditor:
Add a TBitBtn to the form. Delete its Caption, add the requested image to the Glyph property. Set the Visible property to false.
In the OnClick event of this button write how you want to edit the cell. Access the cell specified by the properties Col and Row of the grid. As an example, I assume here that you just want to open an InputBox:
procedure TForm1.BitBtn1Click(Sender: TObject);
begin
StringGrid1.Cells[StringGrid1.Col, StringGrid1.Row] :=
InputBox('Input some text', 'Text:', '');
end;
Now write an event handler for the OnSelectEditor event of the grid. It must assign the BitBtn to the Editor parameter of the event and make sure that the button is at the correct position within the selected cell - that's all!
procedure TForm1.StringGrid1SelectEditor(Sender: TObject; aCol, aRow: Integer;
var Editor: TWinControl);
var
R: TRect;
begin
if (aCol=2) and (aRow > 0) then begin
R := StringGrid1.CellRect(aCol, ARow);
R.Left := R.Right - (R.Bottom - R.Top);
BitBtn1.BoundsRect := R;
Editor := BitBtn1;
end;
end;
Editor.Brush.Image is a property of type TFPCustomImage. This is a TPersistent descendant. And TImage is a descendant of TCustomImage and thus TGraphicControl and TControl. So these are entirely different classes that are not compatible.
So you are not expected to cast (Editor.Brush.Image as TImage) and assign any TImage instance to it.
I am trying to place a label on the wpPreparing page to indicate uninstallation of an existing version, prior to running the new installation. Here is my code:
function PrepareToInstall(var NeedsRestart: Boolean): String;
var
UninstallingLabel: TNewStaticText;
intResultCode: Integer;
begin
with UninstallingLabel do
begin
Caption := 'Uninstalling existing version...';
Left := WizardForm.StatusLabel.Left;
Top := WizardForm.StatusLabel.Top;
Parent := wpPreparing.Surface;
end;
if strExistingInstallPath <> '' then
begin
Exec(GetUninstallString, '/verysilent /suppressmsgboxes', '', SW_HIDE,
ewWaitUntilTerminated, intResultCode);
end;
end;
The trouble is it does not seem to like Parent := wpPreparing.Surface and compiling fails with a
Semicolon (;) expected
error. This syntax works when adding a label to a custom created page. Why does this fail when trying to add it to wpPreparing?
The wpPreparing is not an object, it's just a numerical constant.
The WizardForm.PreparingPage holds a reference to the "Preparing to Install" page. Note that it is of type TNewNotebookPage already, not TWizardPage. So you use it directly as a parent.
Also note that the StatusLabel is on the "Installing" page. You probably want to relate your new label to the PreparingLabel instead.
And you have to create the UninstallingLabel.
UninstallingLabel := TNewStaticText.Create(WizardForm);
with UninstallingLabel do
begin
Caption := 'Uninstalling existing version...';
Left := WizardForm.PreparingLabel.Left;
Top := WizardForm.PreparingLabel.Top;
Parent := WizardForm.PreparingPage;
end;
Though do you really want to shadow the PreparingLabel (as you use its coordinates).
What about reusing it instead?
WizardForm.PreparingLabel.Caption := 'Uninstalling existing version...';
I've replayed your code. It works if you use just WizardForm as the parent. But it's in the top left corner of the form...
wpPreparing is the name of a constant that holds the ID of the correspnding page.
And you have to create an instance of UninstallingLabel