Hi, Lohitha,
I was just in the process of writing some code for you and then Paulo posted
stuff for you. I’ve attached a file you can copy and paste whatever code
from there into your own project. You will still need to use Paulo’s
concept of an image for the button. Right now, it just fills a box for a
button, but I allowed code for you to easily implement a SDL_Blit instead of
the SDL_FillRect.
Take care,
-AlexOn Wed, May 26, 2010 at 7:53 AM, Lohitha R <lohitha.r at globaledgesoft.com>wrote:
Thank you Paulo,
I’l do it and If i get any problem, i’l get back to you…
–
Lohitha R
Paulo Pinto wrote:
You will need to have two images for the buttons, representing the pressed
and not pressed state.
Depending on how the user interacts with the button, you will need to draw
the corresponding image.
–
Paulo
On Wed, May 26, 2010 at 1:09 PM, Lohitha R <lohitha.r at globaledgesoft.com>wrote:
Grate…!! Thank you Paulo…
and one more, can i have any sdl buttons over there....?? like
what i get in gtk, gtk buttons…?? Because, it should feel like, pressing
button only… why i’m telling this is, i got one example program, in that
button was there but they are not actually buttons… so any idea about
placing buttons, or some graphical image over the sdl_surface…
–
Lohitha R
Paulo Pinto wrote:
Hi,
you will need to draw your UI using SDL, and keep track of where each UI
element is.
Then when the user clicks or presses the keyboard, you will have to track
down what is the current
position (mouse or keyboard navigation) and try to find out if it maps to
a UI element.
There are many ways to do this. One way you could have a Widget struct
containing all the required
information about a widget location and a few function pointers to work as
event handlers:
typedef bool (*EventHandler) (Widget *w);
typedef void (*DrawHandler) (Widget *w, SDLSurface *surface);
typedef struct Widget {
int x, y, width, height;
EventHandler processEvents;
DrawHandler drawWidget;
struct Widget *next;
} Widget;
Then when you validate which UI component was activated, you call its
handlers.
Since you have used GTK before, I would suggest you to have a look at how
GTK components are written.
This will give you some ideas.
Regards,
Paulo
On Wed, May 26, 2010 at 11:43 AM, Lohitha R <lohitha.r at globaledgesoft.com wrote:
Hi,
Thats really nice… But how to do that …??? any Idea… I’m
using C for developing such player…
–
Lohitha R
Vittorio G. wrote:
how about a nice overlay effect that when the mouse is over a video a
HUD appears and displays controls for that video
something like thishttp://www.devicemag.com/wp-content/uploads/2009/06/apple-quicktime-x-flash-support.jpg
(yeah the title is funny)
bye
Vittorio
On Wed, May 26, 2010 at 11:21 AM, Lohitha R<lohitha.r at globaledgesoft.com> <lohitha.r at globaledgesoft.com> wrote:
Hi all,
I have a SDL screen (1024x768 size), and in that, I'm going to
display four videos (each of 352x288 size), using SDL_Rect rect at
different x,y values. I have created pthread and in each thread it has its
own rect and changing the values of x and y and so that i’ll get all four
videos on single SDL_Surface.
Now the problem is, I want control over those video
running, like ( very basic) pause and play. How can it be done… ? One way
is like mouse and keyboard control. But I want some button kind of thing, so
that it will be looking good and one can easily use it…
Any idea, how to do that ???
I searched in google images, I got some good images but, I don’t know how to
develop such kind of UI and what i need to use( Earlier I used GTK and SDL,
But I got single sdl_surface and at a time ). So now I’m using only SDL.
example you can see in this link,
- http://assets.nydailynews.com/img/2009/08/13/tl_app_ira-pro.jpg
- http://www.lisisoft.com/imglisi/7/ActiveX/133951multivideoplayer.jpg
or you can do search as “multiple video display”, you can see more examples
I’m working on Linux-2.6.21.5 and using SDL-1.2
Is it possible using SDL ??
Do I need any other libs ??
please guide me.
–
Lohitha R
SDL mailing list
SDL at lists.libsdl.orghttp://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
_______________________________________________
SDL mailing listSDL at lists.libsdl.orghttp://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
SDL mailing listSDL at lists.libsdl.orghttp://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
SDL mailing listSDL at lists.libsdl.orghttp://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
-------------- next part --------------
/*
Name : sdl-uibutton.c
Author : Alex Barry
Version :
Copyright : Copyright 2010
Description : SDL User Interface - Button
*/
#include <stdio.h>
#include <stdlib.h>
#include <SDL/SDL.h>
typedef struct UIButton UIButton;
typedef struct UIButtonList UIButtonList;
struct UIButton {
SDL_Surface *surface;
SDL_Rect p;
int state; // 0 = nothing, 1 = hover, 2 = left-click
void (*onClick)(UIButton *);
void (*onDraw)(UIButton *);
};
struct UIButtonList {
UIButton **button;
int num;
};
UIButton *newUIButton( void (*click)(UIButton *), void (*draw)(UIButton *) );
void deleteUIButton( UIButton *btn );
void handleUIButtonMouse( UIButton *btn, int x, int y, int b );
UIButtonList *newUIButtonList( int number );
void deleteUIButtonList( UIButtonList *list );
UIButton *UIButtonListAdd( UIButtonList *list, UIButton *btn, SDL_Rect p );
void UIButtonListDelete( UIButtonList *list, UIButton *btn );
void handleUIButtonListMouse( UIButtonList *list, int x, int y, int b );
SDL_Surface *screen; // global screen
// Definitely change these!
void drawButtonDefault( UIButton *self ) {
// draw the button
if( self == NULL ) return;
SDL_Rect r = self->p;
//printf( “Filling %d x %d → %d x %d\n”, r.x, r.y, r.w, r.h );
Uint32 colour = SDL_MapRGB( screen->format, 255, 0, 0 );
if( self->state == 1 ) {
colour = SDL_MapRGB( screen->format, 200, 100, 100 );
} else if( self->state == 2 ) {
colour = SDL_MapRGB( screen->format, 50, 200, 50 );
}
SDL_FillRect( screen, &r, colour );
}
void clickButtonDefault( UIButton *self ) {
// click the button
if( self == NULL ) return;
printf(“Button clicked\n”);
}
int inRect( SDL_Rect r, int x, int y ) {
if( (x >= r.x) && (x <= (r.x+r.w)) && (y >= r.y) && (y <= (r.y+r.h)) )
return 1;
return 0;
}
int main(void) {
if ( SDL_Init(SDL_INIT_AUDIO|SDL_INIT_VIDEO) < 0 )
{
printf(“Unable to init SDL: %s\n”, SDL_GetError());
return -1;
}
atexit(SDL_Quit);
screen = SDL_SetVideoMode( 640, 480, 32, SDL_HWSURFACE );
if ( screen == NULL )
{
printf("Unable to set video: %s\n", SDL_GetError());
return -1;
}
SDL_Event event;
int done = 0, j;
UIButton *button;
SDL_Rect p;
UIButtonList *buttons = newUIButtonList( 5 );
for( j = 0; j < 5; j++ ) {
p.x = 10 + (j * 20); p.y = 50;
p.w = 10; p.h = 10;
button = UIButtonListAdd( buttons, newUIButton(&clickButtonDefault, &drawButtonDefault), p );
}
while(done == 0)
{
// Simple event loop
while ( SDL_PollEvent(&event) )
{
switch( event.type ) {
case SDL_QUIT:
done = 1;
break;
case SDL_KEYDOWN:
if( event.key.keysym.sym == SDLK_ESCAPE ) { done = 1; }
break;
case SDL_MOUSEMOTION:
case SDL_MOUSEBUTTONDOWN:
case SDL_MOUSEBUTTONUP:
handleUIButtonListMouse( buttons, event.button.x, event.button.y, event.button.state & SDL_BUTTON(1) );
}
}
SDL_Flip( screen );
}
return EXIT_SUCCESS;
}
UIButton *newUIButton( void (*click)(UIButton *), void (*draw)(UIButton *) ) {
UIButton *btn = (UIButton *)malloc( sizeof(UIButton) );
if( btn == NULL ) return NULL;
btn->surface = NULL;
btn->p.x = 0;
btn->p.y = 0;
btn->state = 0;
btn->onClick = click;
btn->onDraw = draw;
return btn;
}
void deleteUIButton( UIButton *btn ) {
if( btn == NULL ) return;
if( btn->surface != NULL ) SDL_FreeSurface( btn->surface );
free( btn );
btn = NULL;
}
void handleUIButtonMouse( UIButton *btn, int x, int y, int b ) {
// Set state/button information
if( inRect( btn->p, x, y ) ) {
btn->state = 1;
if( b == 1 ) {
btn->state = 2;
void (*click)(UIButton *) = btn->onClick;
(*click)( btn );
}
} else {
btn->state = 0;
}
void (*draw)(UIButton *) = btn->onDraw;
(*draw)( btn );
}
UIButtonList *newUIButtonList( int number ) {
UIButtonList *list = (UIButtonList *)malloc( sizeof( UIButtonList ) );
if( list == NULL ) return NULL;
list->num = number;
list->button = (UIButton **)malloc( sizeof( UIButton * ) * list->num );
int i; for( i = 0; i < list->num; i++ ) {
list->button[i] = NULL;
}
return list;
}
void deleteUIButtonList( UIButtonList *list ) {
int i; for( i = 0; i < list->num; i++ ) {
deleteUIButton( list->button[i] );
}
free( list->button );
free( list );
list = NULL;
}
UIButton *UIButtonListAdd( UIButtonList *list, UIButton *btn, SDL_Rect p ) {
int i; for( i = 0; i < list->num; i++ ) {
if( list->button[i] == NULL ) {
list->button[i] = btn;
list->button[i]->p = p;
return list->button[i];
}
}
deleteUIButton( btn );
return NULL;
}
void UIButtonListDelete( UIButtonList *list, UIButton *btn ) {
int i; for( i = 0; i < list->num; i++ ) {
if( list->button[i] == btn ) {
deleteUIButton( list->button[i] );
list->button[i] = NULL;
}
}
}
void handleUIButtonListMouse( UIButtonList *list, int x, int y, int b ) {
// handle mouse events
int i; for( i = 0; i < list->num; i++ ) {
handleUIButtonMouse( list->button[i], x, y, b );
}
}
