SFML community forums

Help => Graphics => Topic started by: Fantasy on July 07, 2011, 03:57:10 pm

Title: if key pressed and released draw image doesnt work
Post by: Fantasy on July 07, 2011, 03:57:10 pm

hello everyone
i have an image and i want when i press key::M to draw the image but it isnt working

i tried this but the image disappear when releasing M key

Code: [Select]


if(Game.GetInput().IsKeyDown(sf::Key::M))
Game.Draw(Sprite);


i also tried this and it works perfectly but when i move the mouse  the image disappear

Code: [Select]


while(Game.IsOpened())
{
sf::Event Event;
while(Game.GetEvent(Event))
{
}

Game.Clear();
if(Event.Type == sf::Event::KeyReleased && Event.Key.Code == sf::Key::M)
Game.Draw(Sprite);
Game.Display();


i also tried this but it doesn't work at all

Code: [Select]


while(Game.IsOpened())
{
sf::Event Event;
while(Game.GetEvent(Event))
{
if(Event.Type == sf::Event::KeyReleased && Event.Key.Code == sf::Key::M)
Game.Draw(Sprite);
}

Game.Clear();
Game.Display();


please can someone help  :(

Title: if key pressed and released draw image doesnt work
Post by: Laurent on July 07, 2011, 04:01:30 pm

You want the image to stay after the key is released, so you can't simply rely on the "key pressed" state or event, you must set a permanent flag.

Code: [Select]

bool draw = false;
while(Game.IsOpened())
{
    sf::Event Event;
    while(Game.GetEvent(Event))
    {
        if(Event.Type == sf::Event::KeyPressed && Event.Key.Code == sf::Key::M)
            draw = true;
    }
}

Game.Clear();
if (draw)
    Game.Draw(Sprite);
Game.Display();

Title: if key pressed and released draw image doesnt work
Post by: Fantasy on July 07, 2011, 04:11:11 pm

Quote from: "Laurent"

You want the image to stay after the key is released, so you can't simply rely on the "key pressed" state or event, you must set a permanent flag.

Code: [Select]

bool draw = false;
while(Game.IsOpened())
{
    sf::Event Event;
    while(Game.GetEvent(Event))
    {
        if(Event.Type == sf::Event::KeyPressed && Event.Key.Code == sf::Key::M)
            draw = true;
    }
}

Game.Clear();
if (draw)
    Game.Draw(Sprite);
Game.Display();

omg thank you so much i have been thinking of a way for the past hour and a half.
thank you  :D  :D