// ---------------------------------------------------------------------------
// Constructeur
// ------------
bStdAlert::bStdAlert(int kind,
int def_btn,
bool has_cancel,
const char* error_string,
const char* explanation_string,
bool silent,
UInt32 delay){
_res=false;
if(silent){
fprintf(stderr,"ALERT : %s\n",error_string);
fprintf(stderr,"%s\n",explanation_string);
_res=true;
return;
}
AlertStdCFStringAlertParamRec prm;
(void)GetStandardAlertDefaultParams(&prm,kStdCFStringAlertVersionOne);
prm.defaultButton=def_btn;
if(def_btn==kAlertStdAlertOKButton){
prm.cancelButton=kAlertStdAlertCancelButton;
}
else if(def_btn==kAlertStdAlertCancelButton){
prm.cancelButton=kAlertStdAlertOKButton;
}
char msg[__MESSAGE_STRING_LENGTH_MAX__];
message_string(kMsgOk,msg,1);
prm.defaultText=CFStringCreateWithCString(kCFAllocatorDefault,msg,kCFStringEncodingMacRoman);
if(has_cancel){
message_string(kMsgCancel,msg,1);
prm.cancelText=CFStringCreateWithCString(kCFAllocatorDefault,msg,kCFStringEncodingMacRoman);
}
CFStringRef err=CFStringCreateWithCString(kCFAllocatorDefault,error_string,kCFStringEncodingMacRoman);
CFStringRef exp=CFStringCreateWithCString(kCFAllocatorDefault,explanation_string,kCFStringEncodingMacRoman);
DialogRef alrt;
(void)CreateStandardAlert(kind,err,exp,&prm,&alrt);
SetDialogTimeout(alrt,def_btn,delay);
(void)RunStandardAlert(alrt,NULL,&_hit);
_res=(_hit==def_btn);
CFRelease(err);
CFRelease(exp);
}
//
// AskIfNewResolutionWorks() creates a dialog box in the center of the screen. The dialog asks the
// user if the current display setting works. This is necessary because a number of display settings
// listed by the OS dont actually work and leave the user with a black screen. The dialog has a 5
// second timeout. If the user does not hit ok within 5 seconds the cancel item is chosen automatically
// for him. This feature allows the user to do nothing (which he will probably do if confronted by a
// black screen) and still be ok. The method that I have employed to do the timeout requires Appearances
// 1.1. I believe this was introduced with OS 8.5. If you want to support back to OS 8.1, then you will
// have to do your own modal dialog event proc that implements a timeout. The dialog has not default
// button by default. Cmd-period and esc trigger the cancel button.
//
//
OSStatus AskIfNewResolutionWorks( ScreenRef screen )
{
DEBUGMESSAGE( "Querying user whether the new resolution works...." );
if( ! screen )
return noErr;
//Read the new screen dimensions
RLDrawInfo screenData;
Rect dialogBounds = {0,0,130, 340};
OSStatus error = GetCurrentScreenDrawingInfo( screen, &screenData );
if( error )
{
DEBUGMESSAGE( "Unable to get current screen drawing information. Got back error # " << error );
return error;
}
//Make a copy of our dialog item list. This will be destroyed when the dialog is destroyed.
Handle ditlCopy = LoadDITL();
HandToHand( &ditlCopy );
//Center the dialog rect on the screen
{
SInt32 horizontalOffset = (SInt32( screenData.bounds.right) + SInt32( screenData.bounds.left ) - SInt32(dialogBounds.right) + SInt32(dialogBounds.left) ) / 2;
SInt32 verticalOffset = (SInt32( screenData.bounds.bottom) + SInt32( screenData.bounds.top ) - SInt32(dialogBounds.bottom) + SInt32(dialogBounds.top) ) / 2;
dialogBounds.left += horizontalOffset;
dialogBounds.right += horizontalOffset;
dialogBounds.top += verticalOffset;
dialogBounds.bottom += verticalOffset;
}
//Init a new dialog hidden
DialogPtr dialog = NewFeaturesDialog( NULL, &dialogBounds, "\pResolution Verification", true, kWindowModalDialogProc,
(WindowPtr) -1L, false, TickCount(), ditlCopy, 0 );
if( ! dialog )
{
DEBUGMESSAGE( "Unable to init the \"AskIfNewResolutionWorks\" dialog window. Perhaps there is insufficient free memory or the DITL did not load properly at library startup?" );
return rlOutOfMemory;
}
//Make sure the dialog cancel item is button # 2
SetDialogCancelItem( dialog, 2 );
//Set dialog to timeout after 5 seconds
SetDialogTimeout( dialog, 2, 5 );
for( bool done = false; !done; )
{
short itemHit = 0;
ModalDialog ( NULL, &itemHit );
switch( itemHit )
{
case 2: //cancel
DEBUGMESSAGE( "The user hit cancel or the dialog timed out. The new resolution is probably not good." );
done = true;
error = rlRezNotFound;
break;
case 3: //ok
DEBUGMESSAGE( "The user hit ok. The new resolution seems to be Okay!" );
done = true;
error = noErr;
break;
}
}
DisposeDialog( dialog );
return error;
}