Rev 2097 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 964 | jag | 1 | /* |
| 2 | * viewwin.cc |
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| 2302 | jag | 3 | * DIN Is Noise is copyright (c) 2006-2025 Jagannathan Sampath |
| 1479 | jag | 4 | * For more information, please visit https://dinisnoise.org/ |
| 964 | jag | 5 | */ |
| 6 | |||
| 7 | |||
| 8 | #include "dingl.h" |
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| 9 | #include "viewwin.h" |
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| 10 | #include "main.h" |
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| 11 | #include "log.h" |
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| 2075 | jag | 12 | #include <iostream> |
| 964 | jag | 13 | |
| 14 | using namespace std; |
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| 15 | |||
| 16 | viewport::viewport () { |
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| 17 | width = height = 0; |
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| 18 | xmax = ymax = 0; |
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| 19 | xmax_1 = ymax_1 = 0; |
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| 20 | } |
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| 21 | |||
| 22 | viewport::~viewport () { |
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| 2075 | jag | 23 | dlog << "--- destroyed viewport: " << width << spc << height << " ---" << endl; |
| 964 | jag | 24 | } |
| 25 | |||
| 26 | void viewport::operator() (int w, int h) { |
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| 2075 | jag | 27 | if (w != width || h != height) calc (w, h); |
| 964 | jag | 28 | } |
| 29 | |||
| 30 | void viewport::calc (int w, int h) { |
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| 31 | width = w; |
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| 32 | height = h; |
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| 33 | xmax = width - 1; |
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| 34 | ymax = height - 1; |
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| 35 | xmax_1 = 1.0f / xmax; |
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| 36 | ymax_1 = 1.0f / ymax; |
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| 1374 | jag | 37 | midx = width / 2; |
| 38 | midy = height / 2; |
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| 964 | jag | 39 | handle_factor = handle_radius * 1.0f / width; |
| 2075 | jag | 40 | dlog << "*** viewport changed to : " << w << spc << h << " ***" << endl; |
| 964 | jag | 41 | } |
| 42 | |||
| 43 | bool viewport::inside (int x, int y) { |
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| 2075 | jag | 44 | int xi = (x > -1) && (x < width); |
| 45 | int yi = (y > -1) && (y < height); |
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| 964 | jag | 46 | return (xi && yi); |
| 47 | } |
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| 48 | |||
| 49 | void window::calc_panxy () { |
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| 50 | pan_x = PAN_AMOUNT * width; |
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| 51 | pan_y = PAN_AMOUNT * height; |
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| 52 | } |
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| 53 | |||
| 54 | void window::calc_handle_radius () { |
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| 55 | handle_radius = viewport::handle_factor * width; |
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| 56 | handle_radius2 = handle_radius * handle_radius; |
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| 57 | sus_handle_radius = 2 * handle_radius; |
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| 58 | } |
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| 59 | |||
| 60 | window::window () : box<float>() { |
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| 61 | width_1 = height_1 = 0; |
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| 62 | aspect_ratio = 0; |
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| 63 | } |
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| 64 | |||
| 65 | window::window (float l, float b, float r, float t) { |
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| 66 | set (l, b, r, t); |
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| 67 | } |
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| 68 | |||
| 69 | void window::set (float l, float b, float r, float t) { |
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| 70 | operator() (l, b, r, t); |
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| 71 | aspect_ratio = width * height_1; |
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| 72 | calc_panxy (); |
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| 73 | calc_viewwin (); |
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| 74 | calc_handle_radius (); |
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| 75 | window::calc_repeats (); |
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| 76 | } |
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| 77 | |||
| 78 | void window::get (float& l, float& b, float& r, float& t) { |
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| 79 | l = left; |
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| 80 | b = bottom; |
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| 81 | r = right; |
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| 82 | t = top; |
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| 83 | } |
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| 84 | |||
| 85 | void window::panx (int dir) { |
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| 86 | float dpan = pan_x * dir; |
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| 87 | left = left + dpan; |
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| 88 | right = left + width; |
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| 89 | mousex += dpan; |
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| 90 | } |
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| 91 | |||
| 92 | void window::pany (int dir) { |
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| 93 | float dpan = pan_y * dir; |
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| 94 | bottom = bottom + pan_y * dir; |
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| 95 | top = bottom + height; |
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| 96 | mousey += dpan; |
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| 97 | } |
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| 98 | |||
| 99 | void window::zoom (int dir) { |
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| 100 | float dw = ZOOM_AMOUNT * width * dir, dh = dw / aspect_ratio, dw2 = dw / 2, dh2 = dh / 2; |
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| 101 | float l = left - dw2; |
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| 102 | float r = right + dw2; |
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| 103 | float b = bottom - dh2; |
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| 104 | float t = top + dh2; |
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| 105 | float w = r - l, h = t - b; |
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| 106 | if ((w > 0) && (h > 0)) set (l, b, r, t); |
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| 107 | } |
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| 108 | |||
| 109 | void window::locate_mouse () { |
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| 110 | extern viewport view; |
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| 111 | extern int mousex, mousey; |
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| 112 | view2win (mousex, mousey, window::mousex, window::mousey, view, *this); |
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| 113 | prev_mousex = mousex; |
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| 114 | prev_mousey = mousey; |
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| 115 | } |
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| 116 | |||
| 117 | void window::update_mouse () { |
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| 118 | extern int mousex, mousey; |
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| 119 | mousex_prev = window::mousex; |
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| 120 | mousey_prev = window::mousey; |
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| 121 | window::mousex += (mousex - prev_mousex) * vwx; |
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| 122 | window::mousey -= (mousey - prev_mousey) * vwy; |
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| 123 | prev_mousex = mousex; |
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| 124 | prev_mousey = mousey; |
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| 125 | } |
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| 126 | |||
| 127 | int window::diff_mouse (float& dx, float& dy) { |
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| 128 | dx = mousex - mousex_prev; |
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| 129 | dy = mousey - mousey_prev; |
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| 130 | if (dx || dy) return 1; else return 0; |
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| 131 | } |
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| 132 | |||
| 133 | void window::calc_viewwin () { |
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| 134 | extern viewport view; |
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| 135 | vwx = width / view.xmax; |
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| 136 | vwy = height / view.ymax; |
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| 137 | locate_mouse (); |
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| 138 | } |
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| 139 | |||
| 140 | void window::calc_repeats () { |
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| 141 | if (PAN_RATE > 0) PAN_REPEAT = 1. / PAN_RATE; |
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| 142 | if (ZOOM_RATE > 0) ZOOM_REPEAT = 1. / ZOOM_RATE; |
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| 143 | } |
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| 144 | |||
| 145 | void window::calc () { |
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| 146 | box<float>::calc (); |
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| 147 | calc_repeats (); |
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| 148 | calc_panxy (); |
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| 149 | calc_viewwin (); |
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| 150 | calc_handle_radius (); |
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| 151 | } |
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| 152 | |||
| 153 | void view2win (int vx, int vy, float& wx, float& wy, viewport& view, window& win) { |
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| 154 | float xr = vx * view.xmax_1; |
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| 155 | float yr = 1 - vy * view.ymax_1; |
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| 156 | wx = win.left + xr * win.width; |
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| 157 | wy = win.bottom + yr * win.height; |
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| 158 | } |
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| 159 | |||
| 160 | void win2view (float wx, float wy, int& vx, int& vy, window& win, viewport& view) { |
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| 161 | float xr = (wx - win.left) * win.width_1; |
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| 162 | float yr = (wy - win.bottom) * win.height_1; |
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| 163 | vx = (int) (xr * view.xmax + 0.5); |
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| 164 | vy = (int) (yr * view.ymax + 0.5); |
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| 165 | } |