135 lines
4.0 KiB
Objective-C
135 lines
4.0 KiB
Objective-C
// 27 may 2016
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#include "uipriv_darwin.h"
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// TODO scrolled drawing test may have a random size outside the area size
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struct scrollViewData {
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NSLayoutConstraint *documentLeading;
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NSLayoutConstraint *documentTop;
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BOOL hscroll;
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NSLayoutConstraint *documentTrailing;
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BOOL vscroll;
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NSLayoutConstraint *documentBottom;
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};
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NSScrollView *mkScrollView(struct scrollViewCreateParams *p, struct scrollViewData **dout)
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{
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NSScrollView *sv;
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NSBorderType border;
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struct scrollViewData *d;
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sv = [[NSScrollView alloc] initWithFrame:NSZeroRect];
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if (p->BackgroundColor != nil)
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[sv setBackgroundColor:p->BackgroundColor];
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[sv setDrawsBackground:p->DrawsBackground];
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border = NSNoBorder;
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if (p->Bordered)
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border = NSBezelBorder;
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// document view seems to set the cursor properly
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[sv setBorderType:border];
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[sv setAutohidesScrollers:YES];
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[sv setHasHorizontalRuler:NO];
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[sv setHasVerticalRuler:NO];
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[sv setRulersVisible:NO];
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[sv setScrollerKnobStyle:NSScrollerKnobStyleDefault];
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// the scroller style is documented as being set by default for us
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// LONGTERM verify line and page for programmatically created NSTableView
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[sv setScrollsDynamically:YES];
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[sv setFindBarPosition:NSScrollViewFindBarPositionAboveContent];
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[sv setUsesPredominantAxisScrolling:NO];
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[sv setHorizontalScrollElasticity:NSScrollElasticityAutomatic];
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[sv setVerticalScrollElasticity:NSScrollElasticityAutomatic];
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[sv setAllowsMagnification:NO];
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[p->DocumentView setTranslatesAutoresizingMaskIntoConstraints:NO];
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[sv setDocumentView:p->DocumentView];
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d = uiNew(struct scrollViewData);
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scrollViewSetScrolling(sv, d, p->HScroll, p->VScroll);
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*dout = d;
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return sv;
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}
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static void scrollViewConstraintsRemove(NSScrollView *sv, struct scrollViewData *d)
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{
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if (d->documentLeading != nil) {
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[sv removeConstraint:d->documentLeading];
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[d->documentLeading release];
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d->documentLeading = nil;
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}
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if (d->documentTop != nil) {
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[sv removeConstraint:d->documentTop];
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[d->documentTop release];
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d->documentTop = nil;
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}
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if (d->documentTrailing != nil) {
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[sv removeConstraint:d->documentTrailing];
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[d->documentTrailing release];
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d->documentTrailing = nil;
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}
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if (d->documentBottom != nil) {
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[sv removeConstraint:d->documentBottom];
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[d->documentBottom release];
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d->documentBottom = nil;
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}
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}
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// based on http://blog.bjhomer.com/2014/08/nsscrollview-and-autolayout.html because (as pointed out there) Apple's official guide is really only for iOS
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void scrollViewSetScrolling(NSScrollView *sv, struct scrollViewData *d, BOOL hscroll, BOOL vscroll)
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{
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NSView *cv, *dv;
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NSLayoutRelation rel;
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scrollViewConstraintsRemove(sv, d);
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cv = [sv contentView];
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dv = [sv documentView];
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d->documentLeading = mkConstraint(dv, NSLayoutAttributeLeading,
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NSLayoutRelationEqual,
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cv, NSLayoutAttributeLeading,
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1, 0,
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@"NSScrollView document leading constraint");
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[sv addConstraint:d->documentLeading];
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[d->documentLeading retain];
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d->documentTop = mkConstraint(dv, NSLayoutAttributeTop,
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NSLayoutRelationEqual,
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cv, NSLayoutAttributeTop,
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1, 0,
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@"NSScrollView document top constraint");
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[sv addConstraint:d->documentTop];
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[d->documentTop retain];
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d->hscroll = hscroll;
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[sv setHasHorizontalScroller:d->hscroll];
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rel = NSLayoutRelationGreaterThanOrEqual;
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if (!d->hscroll)
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rel = NSLayoutRelationEqual;
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d->documentTrailing = mkConstraint(dv, NSLayoutAttributeTrailing,
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rel,
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cv, NSLayoutAttributeTrailing,
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1, 0,
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@"NSScrollView document trailing constraint");
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[sv addConstraint:d->documentTrailing];
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[d->documentTrailing retain];
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d->vscroll = vscroll;
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[sv setHasVerticalScroller:d->vscroll];
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rel = NSLayoutRelationGreaterThanOrEqual;
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if (!d->vscroll)
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rel = NSLayoutRelationEqual;
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d->documentBottom = mkConstraint(dv, NSLayoutAttributeBottom,
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rel,
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cv, NSLayoutAttributeBottom,
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1, 0,
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@"NSScrollView document bottom constraint");
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[sv addConstraint:d->documentBottom];
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[d->documentBottom retain];
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}
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void scrollViewFreeData(NSScrollView *sv, struct scrollViewData *d)
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{
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scrollViewConstraintsRemove(sv, d);
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uiFree(d);
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}
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