MATLAB GAUGES BLOCKSET RELEASE NOTES Guide de l'utilisateur télécharger pdf (Page 83)

Using Your Own ActiveX Control

3-35

Additionally, you can choose an event on your control through which you want

to open the property editor. For example, write an M-file function to open the

property editor (or whatever you want the event to do). The function must take

multiple arguments, of which the first one will be the handle to the ActiveX

control. For example, a simple function to open the property editor of a control

would look like this:

function axeventhandler(varargin)

propedit(varargin{1})

Next enter an event with the handler you just wrote in the Other Events and

Handlers

parameter field. Assume the keypress event is valid, the event and

handler entry would look like this:

{'keypress','axeventhandler'}

To use the error-checking code already written for the Dials & Gauges

Blockset, you can use the same handlers we use by entering

ax_block_dclk for

events that should open the property editor (note that the editor will not open

when the simulation is running). For example, to make a keystroke open the

property editor (assuming the

keypress event isvalid), enter the event and

handler pair as follows:

{'keypress','ax_block_dclk'}

Colors of ActiveX Control Blocks

ActiveX Control blocks that try to determine their color by inheriting from the

window in which they reside will not work properly in Simulink. More

specifically, ActiveX Control blocks that send the

WM_CTLCOLOR message to their

parent have this problem.

WM_CTLCOLOR is a Microsoft Windows message sent

by an ActiveX Control block to allow the parent container to determine the

color used by the control.

Caution Placing one of these controls in the ActiveX Control block will cause

MATLAB and Simulink to crash.

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