1.1 --- a/src/dicomview.cc	Tue Dec 30 21:20:57 2014 +0200
     1.2 +++ b/src/dicomview.cc	Wed Dec 31 05:21:47 2014 +0200
     1.3 @@ -134,43 +134,51 @@
     1.4  	}
     1.5  }
     1.6  
     1.7 +static bool zscaling;
     1.8 +
     1.9  void ev_keyboard(int key, int press, int x, int y)
    1.10  {
    1.11  	RendererFast *fr;
    1.12  
    1.13 -	if(press) {
    1.14 -		switch(key) {
    1.15 -		case 27:
    1.16 +	switch(key) {
    1.17 +	case 27:
    1.18 +		if(press) {
    1.19  			quit();
    1.20 +		}
    1.21 +		break;
    1.22  
    1.23 -		case '=':
    1.24 -			if((fr = dynamic_cast<RendererFast*>(rend))) {
    1.25 -				int n = fr->get_proxy_count();
    1.26 -				int add = n / 4;
    1.27 -				n += add < 1 ? 1 : add;
    1.28 -				printf("proxy count: %d\n", n);
    1.29 -				fr->set_proxy_count(n);
    1.30 -			}
    1.31 +	case 'z':
    1.32 +	case 'Z':
    1.33 +		zscaling = press;
    1.34 +		break;
    1.35 +
    1.36 +	case '=':
    1.37 +		if(press && (fr = dynamic_cast<RendererFast*>(rend))) {
    1.38 +			int n = fr->get_proxy_count();
    1.39 +			int add = n / 4;
    1.40 +			n += add < 1 ? 1 : add;
    1.41 +			printf("proxy count: %d\n", n);
    1.42 +			fr->set_proxy_count(n);
    1.43  			redisplay();
    1.44 -			break;
    1.45 +		}
    1.46 +		break;
    1.47  
    1.48 -		case '-':
    1.49 -			if((fr = dynamic_cast<RendererFast*>(rend))) {
    1.50 -				int n = fr->get_proxy_count();
    1.51 -				int sub = n / 4;
    1.52 -				n -= sub < 1 ? 1 : sub;
    1.53 +	case '-':
    1.54 +		if(press && (fr = dynamic_cast<RendererFast*>(rend))) {
    1.55 +			int n = fr->get_proxy_count();
    1.56 +			int sub = n / 4;
    1.57 +			n -= sub < 1 ? 1 : sub;
    1.58  
    1.59 -				if(n < 1) n = 1;
    1.60 +			if(n < 1) n = 1;
    1.61  
    1.62 -				printf("proxy count: %d\n", n);
    1.63 -				fr->set_proxy_count(n);
    1.64 -			}
    1.65 +			printf("proxy count: %d\n", n);
    1.66 +			fr->set_proxy_count(n);
    1.67  			redisplay();
    1.68 -			break;
    1.69 +		}
    1.70 +		break;
    1.71  
    1.72 -		default:
    1.73 -			break;
    1.74 -		}
    1.75 +	default:
    1.76 +		break;
    1.77  	}
    1.78  }
    1.79  
    1.80 @@ -202,6 +210,13 @@
    1.81  
    1.82  	if((dx | dy) == 0) return;
    1.83  
    1.84 +	if(bnstate[0] && zscaling) {
    1.85 +		float s = rend->get_zscale() + (float)dy / (float)win_height;
    1.86 +		rend->set_zscale(s < 0.0 ? 0.0 : s);
    1.87 +		redisplay();
    1.88 +		return;
    1.89 +	}
    1.90 +
    1.91  	if(splitter_dragging) {
    1.92  		splitter_y += dy;
    1.93  		redisplay();