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Changing Colors and Styles of controls at run-time
Greg Reichert, GLR Software
This object, when dropped on a form, automatically sets the colors and other properties of all the controls on the form to those that match the same properties on the Style object. Set the properties value once on the Style control, and when the form is ran, then all the controls with the same property have the same value. The only exception are those control that have set the same property explicitly. Works in VFP 6.0 and greater. Version 1.00 has been enhanced with more properties and a Style.txt file for global settings.
Created on
20 years ago
Downloads
1571
File type
Freeware
General information
URL:
http://www.glrsoftware.com/download.asp#Styles.zip
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Description
--------------------------------------------- Introduction --------------------------------------------- Even with global base class to aid in generalizing the look and feel of the application, it can sometimes be difficult to assign the same BackColor to all relative controls. Not to mention, if the user wish to be able to change the look of the application on their machine only. This is a issue that arose resendly to me. So I created the Style object. Now in one place I can control the general look of all of the controls on form or in an application with other dirting up the base classes. --------------------------------------------- Running the Demo. --------------------------------------------- The demonstration form ("Test.scx") illistrates how the Style class applies its own properties to the Form and Controls during run-time. To get the full extent of the demo, open the Test.scx form in the Form Designer. Notice that the colors are the default gray tones. Now run the form. The form and controls now have a Brown tone (Earth tones). Click the radio button with the caption "Shy and Sea", and the colors change to Blue tones. The same for "Valentines Days" button, the colors change to Red tones. But because the ForeColors of the caption of the Radio Buttons are set explicitly at the control level, the Style control does not change that property. --------------------------------------------- Instruction on using the class --------------------------------------------- The Style object is placed anywhere on the form at design-time or can be added with an AddObject method at run-time. More then one Style can exists at a time, providing they have different referencing names. For large applications, the developer may elect to initaniate a global reference to the Style objects and reference then from the Form from there. Once a means of referencing the Style object has been established, the developer must set the properties of the Style class. This can be done either at Design-time (as in the Demo), or applied at run-time, as from a Style file (future version, maybe). As in the demo form, place the statement "ThisForm.Style1.Update()" in the Show method. Now when the Form displayed, then Style1 properties are applied to the form and its controls. Set the lStyleFile property to true (.T.) will inform the Style object to locate and load the Style.Txt file. This file contains properties and values that will override the design-time settings at run-time. This file is good when multiple Style object are available, and certain properties must be a specific value all the time. ----------------------------- Style.txt format ----------------------------- The Style.txt file is a Text file, located at one the following folders. * On the defined Path. * Current folder. * Root of the C Drive (C:\) * or in the C:\Documents and Settings\\My Documents\ The format and syntax of the file is a name / value pair configuration. Only lines that are not blank or start with a astrick (*) are evaluated. The first word of the line is the name of the property, followed by a equal sign (=), then the value for the property. e.i. ForeColor = rgb( 0,0,0 ) --------------------------------------------- Properties and Methods. --------------------------------------------- ----------- Properties ----------- Most of the Standard Methods, Events, some of the Properties have been assigned as Hidden to prevent the unnessacary assignments. The User can alter the Property list by adding or hiding property that match properties on other controls. lStyleFile boolean .T. (default) Load Style.txt file and assign its values to the properties. .F. Do not load Style.txt cStyleFileName String blank (default) The name and path to the Style.txt. Assigned when the Style class is instaniated. ----------- Methods ----------- Update( [toObj] ) : Called to apply the property settings. The toObj parameter is the parent control that the properties will be applied. Defaults to THISFORM. --------------------------------------------- ----------- WARNING ------------ --------------------------------------------- 1. This has not been tested with FormSets or ActiveX controls.
Created by
Greg Reichert, GLR Software

Comments
if the word NoStyle is in the Tag property of an object the style is not applied. Contributed by Koen Piller piller@quicknet.nl - June 17, 2009 - thanks. Greg Reichert, June 18, 2009

I understand, to some degree, why you are hiding properties, although your list seems incomplete. But why are you also hiding methods? That shouldn't be necessary, should it? James R. Nelson, June 20, 2009

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