textCrtrl custom renderer

[sebastián lópez]

I would like to create a text control that works in this way:

If the text control is empty then the control shows a default text 

In the other hand the control shows the user's input.

But i don't know how to set a custom renderer of a textCtrl

[Karsten Hilbert]

On Sun, Oct 26, 2014 at 08:55:43AM -0700, sebastián lópez wrote:

> I would like to create a text control that works in this way:
>
> If the text control is empty then the control shows a default text
>

> <https://lh4.googleusercontent.com/-31USoxFcVso/VE0YqlUIQhI/AAAAAAAAA3Y/2eBQ5ORyyEY/s1600/render%2Bempty.png>

> In the other hand the control shows the user's input.
>
> But i don't know how to set a custom renderer of a textCtrl

You want to read up on "wx.EVT_TEXT".

Karsten
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[sebastián]

if i used SetValue and GetValue methods i'll get the default text, so  i would like to manipulate the renderer

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Atentamente

Sebastián López
Ingeniero Químico
cel 317-709-0956

[Karsten Hilbert]

On Sun, Oct 26, 2014 at 11:21:34AM -0500, sebastián wrote:

> if i used SetValue and GetValue methods i'll get the default text, so i
> would like to manipulate the renderer

Have you read up on wx.EVT_TEXT ?

Karsten

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[sebastián lópez]

Hi

 

I append my approach by using wx.EVT_KEY_DOWN and wx.EVT_KEY_UP  but I also like to know if it’s possible to change the text color in the control to being sometimes black color and sometimes grey color.

 

 

[Yoriz]

You could use a wx.SearchCtrl with the SearchButton, CancelButton ect set to not be shown and use the method SetDescriptiveText for setting your default text.

The search control is a wx.TextCtrl with added functionality.

 

 

[Nathan McCorkle]

I would use EVT_SET_FOCUS and EVT_KILL_FOCUS.

By default on startup you'd set the color style of the TextCtrl to light-grey and set ChangeValue to the default text. Then in the EVT_SET_FOCUS handler, if the default text is shown ChangeValue('') and set the text style to the normal black color. In the EVT_KILL_FOCUS handler, if the GetValue() is '' (blank), set the light-grey text style and ChangeValue(defaultText).

[Tim Roberts]

Nathan McCorkle wrote:

I would use EVT_SET_FOCUS and EVT_KILL_FOCUS.

By default on startup you'd set the color style of the TextCtrl to light-grey and set ChangeValue to the default text. Then in the EVT_SET_FOCUS handler, if the default text is shown ChangeValue('') and set the text style to the normal black color. In the EVT_KILL_FOCUS handler, if the GetValue() is '' (blank), set the light-grey text style and ChangeValue(defaultText).

I don't think that's the right model.  He's looking for the same functionality as the "placeholder" attribute in a modern HTML <input> tag.  ANY time the box goes empty, it displays the placeholder property in a grayed color.  As soon as one character is entered, the placeholder goes away and it displays the entered text in black.

I think you have to use key up and key down.  Either that, or subclass the edit control and draw the placeholder during the paint event.

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