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| [A5] Multiple User Key Input |
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sa1k01
Member #13,707
November 2011
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Hi @ all, i have a question regarding the user key input. Say i have a options dialog with some options like resolution and several key settings for the player. i know, that i can store a single user input with: al_ustr_append_chr(ALLEGRO_USTR, event.keyboard.unichar); but how does this work for multiple input fields? Is there a tutorial for this kind of problem? ^^ greetings |
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Edgar Reynaldo
Major Reynaldo
May 2007
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You'll have to set a focus variable when the user clicks on a field. Then only accept input when that field has focus. My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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sa1k01
Member #13,707
November 2011
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thx for the reply. mh ok. then i should just wait for an mouse click event and save the x and y position of the label, right? i will give it a try and let you know if this works. kind regards |
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Edgar Reynaldo
Major Reynaldo
May 2007
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If you're using a struct/class to store your input field object, then just use a pointer to the active object, or store a flag in the class : 1class InputField {
2private :
3 int x,y,w,h;
4 string text;
5 int caretx;
6 bool hasfocus;
7public :
8 bool CheckInput(ALLEGRO_EVENT ev) {
9 tookfocus = false;
10 if (hasfocus) {
11 // check for unicode key char events here
12 }
13 else {
14 // something else
15 if (ev.type == ALLEGRO_EVENT_MOUSE_DOWN) {
16 tookfocus = Click(ev.mouse.x , ev.mouse.y);
17 }
18 }
19 return tookfocus;
20 }
21
22 void SetFocus(bool focus) {hasfocus = focus;}
23}
1
2InputField in1,in2,in3;
3InputField* infield[3] = {&in1 , &in2 , &in3};
4
5InputField* infocus = 0;
6
7//...
8 ALLEGRO_EVENT ev;
9 al_wait_for_event(event_queue , &ev);
10 for (int i = 0 ; i < 3 ; ++i) {
11 if (infield[i]->CheckInput(ev)) {
12 infocus = infield[i];
13 for (int j = 0 ; j < 3 ; ++j) {
14 infield[i]->SetFocus(infield[i] == infocus);
15 }
16 }
17 }
My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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