0021562: Bug in OnMouseMove X, Y values on Mac OS X

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Date Submitted

Last Update

0021562

Lazarus

LCL

public

2012-03-26 10:36

2012-05-14 16:21

Reporter

Ryan Davis

Assigned To

Priority

normal

Severity

minor

Reproducibility

always

Status

new

Resolution

open

Platform

OS Version

Product Version

0.9.30.5 (SVN)

Product Build

Target Version

Fixed in Version

Summary

0021562: Bug in OnMouseMove X, Y values on Mac OS X

Description

When tracking X or Y values in OnMouseMove they consistently go negative when moving outside the range of a component. For example, if you tracked the X value in OnMouseMove of a TImage, when moving the mouse to the left of the TImage the X value would go negative as the cursor exited the TImage. This is often a useful value to track for implementing the start of drag/drop procedures.

This works normally in Windows for all cases. E.g. the X or Y value will go negative while exiting a component.

This works normally in Mac for a standard window which has focus and working within a single focused window.

If working with two Windows on the Mac, the X value in OnMouseMove will not go negative when exiting the visual component space if the Window in which you are exiting did not have focus when you begin the move operation. For example, if you try to drag back and forth between two windows using OnMouseMove negative values to detect when to begin dragging, the procedure will work for whatever window currently has focus. However, if you try to drag from the window without focus (which instantly gives it focus when you click on it) to the original window the X, Y values in OnMouseMove will never go negative.

The exact same code in Windows when using two windows works fine.

Additional Information

See above.

Tags

No tags attached.

Fixed in Revision

LazTarget

Widgetset

Carbon

Attached Files

Relationships

Notes
(0059585) Anton S. (reporter) 2012-05-14 16:21 edited on: 2012-05-14 16:27	I'v reported in 0020748 about an issue with drag from unfocused form, maybe it's in some way related.

Issue History
Date Modified	Username	Field	Change
2012-03-26 10:36	Ryan Davis	New Issue
2012-03-26 10:36	Ryan Davis	Widgetset	=> Carbon
2012-05-14 16:21	Anton S.	Note Added: 0059585
2012-05-14 16:27	Anton S.	Note Edited: 0059585

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