MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guía de usuario descargar pdf (Pagina 200)

200 Debug an Application

Set a breakpoint

To debug the problem, you can set a breakpoint on the line of code to suspend the application

so that you can inspect the function. Hitting a breakpoint activates the debugging perspective.

1. In the code editor, locate the line of code that contains the Button control. You’ll see that

the Button control’s Click event is bound to the

calculate function. Since this is where

the function is called, this is where you set the breakpoint.

2. Set a breakpoint on the line that contains the Click event handler by right-clicking

(Control-click on Macintosh) in the left margin of the code editor. Select Toggle

Breakpoint from the context menu and a breakpoint marker is added to the margin, as

shown here:

3. Save the file and you’re ready to debug the application.

NOTE

When setting breakpoints in MXML it’s important to understand that when you set a

breakpoint on a line it is set for all elements of the line. If you set a breakpoint on this

line and then run the application, the breakpoint will be activated as soon as the

Button control is drawn on the screen, rather than when it is clicked. To work around

this, you need to format your MXML to place a component’s attributes on separate

lines, as shown here:

<mx:Button

id="btn_calculate"

click="calculate();"

x="95"

y="140"

label="Calculate"

width="100"/>

1 2 ... 195 196 197 198 199 200 201 202 203 204 205 ... 255 256

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MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guía de usuario Pagina 200