Beginner ? on KeyHit and KeyDown
BlitzMax Forums/BlitzMax Beginners Area/Beginner ? on KeyHit and KeyDown
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| I am a beginner. Just got the program. This simple program won't recognize the keystrokes (Enter or ESC). Anyone know why not? Thanks. ; KeyDown() example Print "Hold down ENTER key!" Delay 3000 While Not KeyHit(1) If KeyDown(28) Then Print "Enter is being pressed!" Else Print "No key is being pressed" End If Wend |
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You need to be in 'Graphics mode' for polled input to work. Try putting a 'Graphics 64,64' at the top of your code.Graphics 64,64 Print "Hold down ENTER key!" While Not KeyHit(KEY_ESCAPE) If KeyDown(KEY_ENTER) Then Print "Enter is being pressed!" Else Print "No key is being pressed" End If Delay 500 Wend |
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| I'm not sure what you mean by 'Graphics ModeIs'. Is there more code to the program above? It didn't work when I copy and pasted. =] |
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| For most cases you don't need KeyDown. If you have a menu or options to tigger KeyHit is all you need. NEVER USE DELAY IN A MAIN LOOP! Your key detection will be buggy / laggy because of it and your program will run at different speeds on other PCs. Here's a tiny example code: Graphics 800,600,0 ' init windowed gfxmode While (Not AppTerminate()) And (KeyHit(KEY_ESCAPE)=False) ' Do as long as ESC is pressed or "close" button on window is clicked. Cls SetColor 255,255,255 DrawText " Press the SPACE or ENTER key",20,20 If KeyDown(KEY_SPACE) Then SetColor 0,255,0 Else SetColor 255,0,0 DrawText " SPACE KEY ",20,40 If KeyDown(KEY_ENTER) Then SetColor 0,255,0 Else SetColor 255,0,0 DrawText " ENTER KEY ",20,60 Flip ' show stuff on front buffer Wend ' of main loop End ' of app |
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