Difference between revisions of "Application disable resize over Dock"
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| + | {{Platform only|macOS}} | ||
| + | |||
On macOS it's often needed to disable app window's resize below OS Dock. | On macOS it's often needed to disable app window's resize below OS Dock. | ||
But Lazarus forms always resize below it. | But Lazarus forms always resize below it. | ||
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3) Note: handler has side effect. On dragging window by its caption, handler is called too, so window will be resized on moving it too low, near the Dock. | 3) Note: handler has side effect. On dragging window by its caption, handler is called too, so window will be resized on moving it too low, near the Dock. | ||
| + | |||
| + | == See also == | ||
| + | |||
| + | * [[Bounce Application Icon in Dock]] | ||
| + | * [[Hiding a macOS app from the Dock]] | ||
| + | * [[macOS Application Dock Menu]] | ||
| + | * [[Show Badge on Application Icon in Dock]] | ||
[[Category:macOS]] | [[Category:macOS]] | ||
[[Category:Code Snippets]] | [[Category:Code Snippets]] | ||
Latest revision as of 10:59, 15 December 2021
This article applies to macOS only.
See also: Multiplatform Programming Guide
On macOS it's often needed to disable app window's resize below OS Dock. But Lazarus forms always resize below it. How to disable this resize?
1) Create TForm.OnConstrainedResize handler for your form. Note, it was not "published" in LCL until LCL 1.7. Create it by hands:
TfmMain = class(TForm)
...
private
...
procedure FormConstrainedResize(Sender: TObject; var MinWidth, MinHeight,
MaxWidth, MaxHeight: TConstraintSize);
...
end;
procedure TfmMain.FormCreate(Sender: TObject);
begin
..
Self.OnConstrainedResize:= @FormConstrainedResize;
..
end;
2) Write code in handler to change MaxHeight, value must be workarea height minus current form's Top.
procedure TfmMain.FormConstrainedResize(Sender: TObject; var MinWidth, MinHeight,
MaxWidth, MaxHeight: TConstraintSize);
const
cMinHeight = 200;
var
RWork: TRect;
begin
{$ifndef darwin} exit; {$endif}
RWork:= Screen.PrimaryMonitor.WorkareaRect;
MaxHeight:= Max(cMinHeight, RWork.Bottom - RWork.Top - Top);
end;
3) Note: handler has side effect. On dragging window by its caption, handler is called too, so window will be resized on moving it too low, near the Dock.
