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Detect MouseEnter in grid cells without the cells having the focus
Gregory Adam
Allows to detect MouseEnter (see Thread#1398534 ) in grid columns The cells do not need to have the focus It's an object that has to be added to the form. Once added to the form you can tell it to 'watch' one or more columns. To add a 'watched' column you call a method passing - the ControlSource of the column - a FieldExpression that will be evaluated - a form method or any function name that will be called when the mouse enters the column. The corresponding FieldExpression is added as a parameter See sample When running the sample and moving the mouse over the command buttons of the grid - watch the textboxes above the grid
Créé le
Il y a 14 années
Téléchargements
1520
Type de fichier
Freeware
Résultat de votes
5.00/5.00
General information
URL:
GridCompanion.zip
Résultat de votes:
5.00/5.00 (2 rates) Évaluer cet item
Description
Allows to detect a MouseEnter into one or more columns of a grid. The grid cells do not need to have the focus Upon a mouse enter, a form method or a function will be called with its corresponding evaluated FieldExpression The ControlSource of the column to watch does not have to be equal to the FieldExpression, but it may At the end of the grid's init or in the form init See sample in Form.Grid1.Init (at the end) 
local CompanionObj

do case
case !GridCompanion_Add(GridObjectReference, @m.CompanionObj)
	&& error
case !m.CompanionObj.ColumnMouseWatcher_Add( ;
				ControlSourceOfColumnToWatch, ;
				FieldExpression, ;
				FormMethod ;
			)
	&& error

endcase

To remove a 'watched' column
	ColumnMouseWatcher_Remove(ControlSourceOfColumnToWatch)
How it works A DynamicFontShadow clause is added to the Column Evaluation of that clause adds the evaluated FieldExpression to a collection Dynamic clauses are evaluated left to right and top to bottom In order to keep the collection in sync with the part of the grid that is displayed, it has to be cleared at certain points in time (BindEvent to some events of the grid) A way to force the re-evaluation of the Dynamic clauses is to change the grid's Height (resize)
Créé par
Gregory Adam

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