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SDL_ShowMessageBox
Use this function to create a modal message box.
Contents
Syntax
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int SDL_ShowMessageBox(const SDL_MessageBoxData* messageboxdata,
int* buttonid)
Function Parameters
messageboxdata |
the SDL_MessageBoxData structure with title, text and other options |
buttonid |
the pointer to which user id of hit button should be copied |
Return Value
Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.
Code Examples
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#include "SDL.h"
int main(int argc, char *argv[])
{
const SDL_MessageBoxButtonData buttons[] = {
{ /* .flags, .buttonid, .text */ 0, 0, "no" },
{ SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT, 1, "yes" },
{ SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT, 2, "cancel" },
};
const SDL_MessageBoxColorScheme colorScheme = {
{ /* .colors (.r, .g, .b) */
/* [SDL_MESSAGEBOX_COLOR_BACKGROUND] */
{ 255, 0, 0 },
/* [SDL_MESSAGEBOX_COLOR_TEXT] */
{ 0, 255, 0 },
/* [SDL_MESSAGEBOX_COLOR_BUTTON_BORDER] */
{ 255, 255, 0 },
/* [SDL_MESSAGEBOX_COLOR_BUTTON_BACKGROUND] */
{ 0, 0, 255 },
/* [SDL_MESSAGEBOX_COLOR_BUTTON_SELECTED] */
{ 255, 0, 255 }
}
};
const SDL_MessageBoxData messageboxdata = {
SDL_MESSAGEBOX_INFORMATION, /* .flags */
NULL, /* .window */
"example message box", /* .title */
"select a button", /* .message */
SDL_arraysize(buttons), /* .numbuttons */
buttons, /* .buttons */
&colorScheme /* .colorScheme */
};
int buttonid;
if (SDL_ShowMessageBox(&messageboxdata, &buttonid) < 0) {
SDL_Log("error displaying message box");
return 1;
}
if (buttonid == -1) {
SDL_Log("no selection");
} else {
SDL_Log("selection was %s", buttons[buttonid].text);
}
return 0;
}
Remarks
This function should be called on the thread that created the parent window, or on the main thread if the messagebox has no parent. It will block execution of that thread until the user clicks a button or closes the messagebox.
Version
This function is available since SDL 2.0.0.
