ios/shared/ios_sharedlo/objective_c/render/MLOScalingBuffer.m

   1 // -*- Mode: ObjC; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 //
   3 // This file is part of the LibreOffice project.
   4 //
   5 // This Source Code Form is subject to the terms of the Mozilla Public
   6 // License, v. 2.0. If a copy of the MPL was not distributed with this
   7 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8
   9 #import "MLOScalingBuffer.h"
  10 #import "MLORenderBuffer.h"
  11 #import "MLORenderingUIView.h"
  12
  13 #import "MLORenderManager_Impl.h"
  14 #import <QuartzCore/QuartzCore.h>
  15
  16 @interface MLOScalingBuffer ()
  17 @property MLORenderManager * manager;
  18 @property MLORenderBuffer * active;
  19 @property BOOL didHideActive;
  20 @end
  21
  22 @implementation MLOScalingBuffer
  23
  24 -(id)initWithRenderManager:(MLORenderManager *) manager{
  25     self= [self initWithFrame:manager.view.frame];
  26     if(self){
  27         self.didRender = NO;
  28         self.didHideActive =NO;
  29         self.manager = manager;
  30         self.active  =[manager getActiveBuffer];
  31         self.alpha = 1.0f;
  32         self.backgroundColor = [UIColor clearColor];
  33         [self.manager.view addSubview:self];
  34         self.frame = manager.bufferFrame;
  35         [self setNeedsDisplay];
  36
  37     }
  38     return self;
  39 }
  40
  41 -(void)hideActive{
  42     if(self.didRender && !self.didHideActive){
  43         self.didHideActive = YES;
  44         [self.active hide];
  45     }
  46 }
  47
  48 -(void)scale:(CGFloat) scale deltaX:(CGFloat) deltaX deltaY:(CGFloat) deltaY{
  49
  50     [self hideActive];
  51     if(self.didHideActive){
  52         self.layer.transform = CATransform3DMakeScale(scale,scale,1);
  53     }
  54
  55     [self moveDeltaX:deltaX deltaY:deltaY];
  56 }
  57
  58 -(void)hide{
  59     self.alpha = 0.0f;
  60     [self removeFromSuperview];
  61     self.manager.scaler = nil;
  62 }
  63
  64 -(void)drawRect:(CGRect)rect{
  65
  66     if(!self.didRender){
  67
  68         CGContextRef context = UIGraphicsGetCurrentContext();
  69 //        CGContextSaveGState(context);
  70 //        CGContextFillRect(context, self.bounds);
  71         [self.active.layer renderInContext:context];
  72 //        CGContextRestoreGState(context);
  73         self.didRender = YES;
  74     }else{
  75         [self hideActive];
  76         [super drawRect:rect];
  77     }
  78 }
  79 @end