158 lines
4.0 KiB
Objective-C
158 lines
4.0 KiB
Objective-C
// 26 august 2014
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#include "objc_darwin.h"
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#include <Cocoa/Cocoa.h>
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// We would be able to just use plain old NSPopover here, but alas that steals focus.
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// NSPopovers are intended for interactive content, and Apple seems to be diligent in enforcing this rule, as the known techniques for preventing a NSPopover from stealing focus no longer work in 10.9.
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// Let's just fake it with a window.
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@interface goWarningPopover : NSWindow {
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@public
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id onBegin;
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id onEnd;
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id textfield;
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NSTextView *tv;
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}
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@end
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@implementation goWarningPopover
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- (id)init
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{
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self = [super initWithContentRect:NSZeroRect
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styleMask:NSBorderlessWindowMask
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backing:NSBackingStoreBuffered
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defer:YES];
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[self setOpaque:NO];
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[self setHasShadow:YES];
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[self setExcludedFromWindowsMenu:YES];
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[self setMovableByWindowBackground:NO];
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[self setLevel:NSPopUpMenuWindowLevel];
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[self setHidesOnDeactivate:YES];
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self->onBegin = nil;
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self->onEnd = nil;
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return self;
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}
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- (void)close
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{
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if (self->onBegin != nil) {
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[[NSNotificationCenter defaultCenter] removeObserver:self->onBegin];
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self->onBegin = nil;
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}
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if (self->onEnd != nil) {
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[[NSNotificationCenter defaultCenter] removeObserver:self->onEnd];
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self->onEnd = nil;
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}
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if (self->tv != nil)
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[self->tv removeObserver:self forKeyPath:@"delegate"];
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[super close];
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}
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- (BOOL)canBecomeKeyWindow
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{
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return NO;
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}
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- (BOOL)canBecomeMainWindow
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{
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return NO;
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}
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- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
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{
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if ([self->tv delegate] == self->textfield)
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[self orderFront:self];
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else
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[self orderOut:self];
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}
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@end
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@interface goWarningView : NSView {
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@public
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NSImageView *icon;
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NSTextField *label;
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}
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@end
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@implementation goWarningView
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- (void)sizeToFitAndArrange
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{
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[self->label sizeToFit];
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CGFloat labelheight, imageheight;
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CGFloat targetwidth, imagewidth;
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labelheight = [self->label frame].size.height;
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imageheight = [[self->icon image] size].height;
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imagewidth = [[self->icon image] size].width;
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targetwidth = (imagewidth * labelheight) / imageheight;
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[self->icon setFrameSize:NSMakeSize(targetwidth, labelheight)];
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[self setFrameSize:NSMakeSize(targetwidth + [self->label frame].size.width, labelheight)];
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[self->icon setFrameOrigin:NSMakePoint(0, 0)];
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[self->label setFrameOrigin:NSMakePoint(targetwidth, 0)];
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}
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- (BOOL)acceptsFirstResponder
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{
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return NO;
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}
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@end
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id newWarningPopover(char *text)
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{
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goWarningView *wv;
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wv = [[goWarningView alloc] initWithFrame:NSZeroRect];
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wv->icon = [[NSImageView alloc] initWithFrame:NSZeroRect];
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[wv->icon setImage:[NSImage imageNamed:NSImageNameCaution]];
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[wv->icon setImageFrameStyle:NSImageFrameNone];
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[wv->icon setImageAlignment:NSImageAlignCenter];
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[wv->icon setImageScaling:NSImageScaleProportionallyUpOrDown];
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[wv->icon setEditable:NO];
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[wv->icon setAnimates:NO];
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[wv->icon setAllowsCutCopyPaste:NO];
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[wv->icon setRefusesFirstResponder:YES];
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wv->label = (NSTextField *) newLabel();
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textfieldSetText((id) wv->label, text);
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[wv->label setRefusesFirstResponder:YES];
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[wv addSubview:wv->icon];
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[wv addSubview:wv->label];
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[wv sizeToFitAndArrange];
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goWarningPopover *popover;
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popover = [[goWarningPopover alloc] init]; // explicitly use our initializer
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[[popover contentView] addSubview:wv];
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[popover setContentSize:[wv frame].size];
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return (id) popover;
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}
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void warningPopoverShow(id popover, id control)
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{
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goWarningPopover *p = (goWarningPopover *) popover;
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NSView *v = (NSView *) control;
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NSRect vr;
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NSPoint vo;
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// note that the frame is a rect of the superview
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vr = [[v superview] convertRect:[v frame] toView:nil];
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vo = [[v window] convertRectToScreen:vr].origin;
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[p setFrameOrigin:NSMakePoint(vo.x, vo.y - [p frame].size.height)];
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p->textfield = control;
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p->tv = (NSTextView *) [[v window] fieldEditor:NO forObject:nil];
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// thanks to http://stackoverflow.com/a/25562783/3408572 for suggesting KVO here
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[p->tv addObserver:p forKeyPath:@"delegate" options:NSKeyValueObservingOptionNew context:NULL];
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[p orderFront:p];
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}
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