128 lines
2.6 KiB
Objective-C
128 lines
2.6 KiB
Objective-C
// 9 september 2015
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#include "area.h"
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// model:
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// - drawing and events happen to the NSClipView
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// - the document view is only used for scroll extents
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@interface areaClipView : NSClipView {
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uiArea *libui_a;
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uiAreaHandler *libui_ah;
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}
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- (id)initWithFrame:(NSRect)r area:(uiArea *)a areaHandler:(uiAreaHandler *)ah;
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@end
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@interface areaDocumentView : NSView
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@end
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struct uiArea {
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// uiDarwinControl c;
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NSScrollView *view;
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areaClipView *clipView;
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areaDocumentView *documentView;
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uiAreaHandler *ah;
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};
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@implementation areaClipView
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- (id)initWithFrame:(NSRect)r area:(uiArea *)a areaHandler:(uiAreaHandler *)ah
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{
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self = [super initWithFrame:r];
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if (self) {
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self->libui_a = a;
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self->libui_ah = ah;
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}
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return self;
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}
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- (void)drawRect:(NSRect)r
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{
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CGContextRef c;
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uiAreaDrawParams dp;
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[super drawRect:r];
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c = (CGContextRef) [[NSGraphicsContext currentContext] graphicsPort];
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dp.Context = newContext(c);
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dp.ClientWidth = [self frame].size.width;
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dp.ClientHeight = [self frame].size.height;
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dp.ClipX = r.origin.x;
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dp.ClipY = r.origin.y;
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dp.ClipWidth = r.size.width;
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dp.ClipHeight = r.size.height;
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// TODO DPI
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// TODO scroll position
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(*(self->libui_ah->Draw))(self->libui_ah, self->libui_a, &dp);
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}
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- (BOOL)isFlipped
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{
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return YES;
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}
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// see http://stackoverflow.com/questions/11318987/black-background-when-overriding-drawrect-in-uiscrollview (for iOS but same idea)
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// TODO there has to be a better way to set this; how does OS X do it for its default clip view?
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/*- (BOOL)isOpaque
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{
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return NO;
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}*/
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@end
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@implementation areaDocumentView
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- (BOOL)isFlipped
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{
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return YES;
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}
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@end
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uiArea *newArea(uiAreaHandler *ah)
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{
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uiArea *a;
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// TODO
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a = (uiArea *) malloc(sizeof (uiArea));
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a->ah = ah;
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a->view = [[NSScrollView alloc] initWithFrame:NSZeroRect];
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a->clipView = [[areaClipView alloc] initWithFrame:NSZeroRect area:a areaHandler:ah];
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a->documentView = [[areaDocumentView alloc] initWithFrame:NSZeroRect];
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[a->view setContentView:a->clipView];
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[a->view setDocumentView:a->documentView];
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// TODO set up scroll view
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// for some reason, without this line, NSLayoutConstraints complains about internal limits being exceeded
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[a->view setDrawsBackground:YES];
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//TODO [a->view setBackgroundColor:[NSColor controlColor]];
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// set initial state
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// TODO do this on other platforms?
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areaUpdateScroll(a);
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return a;
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}
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NSView *areaView(uiArea *a)
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{
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return a->view;
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}
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void areaUpdateScroll(uiArea *a)
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{
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NSRect frame;
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frame.origin = NSMakePoint(0, 0);
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frame.size.width = (*(a->ah->HScrollMax))(a->ah, a);
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frame.size.height = (*(a->ah->VScrollMax))(a->ah, a);
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[a->documentView setFrame:frame];
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}
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