[SDL] SDL 1.3 Text editing

[Jjgod Jiang]

Hi Pavel,

On Thu, Apr 15, 2010 at 3:41 AM, Pavel Kanzelsberger <kanzels at gmail.com> wrote:
> I'm working on a multi-window GUI and now working on text input.
>
> It works perfect but when I want to implement text editing events and character composition, I would like to display it as well. The problem is that corresponding event structure is missing windowID and I don't know to what window the final text input goes...
>
> Here for this event, windowID is not specified...
>
> typedef struct SDL_TextEditingEvent
> {
>    Uint32 type;                                /**< ::SDL_TEXTEDITING */
>    char text[SDL_TEXTEDITINGEVENT_TEXT_SIZE];  /**< The editing text */
>    int start;                                  /**< The start cursor of selected editing text */
>    int length;                                 /**< The length of selected editing text */
> } SDL_TextEditingEvent;
>
> And then when character is finally composed, I know the windowID:
>
> typedef struct SDL_TextInputEvent
> {
>    Uint32 type;                              /**< ::SDL_TEXTINPUT */
>    Uint32 windowID;                          /**< The window with keyboard focus, if any */
>    Uint8 which;                              /**< The keyboard device index */
>    Uint8 padding1;
>    Uint8 padding2;
>    Uint8 padding3;
>    char text[SDL_TEXTINPUTEVENT_TEXT_SIZE];  /**< The input text */
> } SDL_TextInputEvent;
>
> Could that be fixed or is it a limitation of some operating system??
>
> I could hack some code and remember what was the last active window, but that's not very safe probably.

Indeed, that can be fixed. Can you give me a sample code that how you
are going to use this API with multi-window? Even pseudo-code will
help me understand the situation better.

Currently the text input implementation is a bit broken for
multi-window since I only added a field edit to the front most window
on Cocoa_StartTextInput(). It can be solved once we switched to use
the field edit provided by NSWindow. I am working on it.

- Jiang