2 CLASS(Image) EXTENDS(Item)
3 METHOD(Image, configureImage, void(entity, string))
4 METHOD(Image, draw, void(entity))
5 METHOD(Image, toString, string(entity))
6 METHOD(Image, resizeNotify, void(entity, vector, vector, vector, vector))
7 METHOD(Image, updateAspect, void(entity))
8 METHOD(Image, initZoom, void(entity))
9 METHOD(Image, setZoom, void(entity, float, float))
10 METHOD(Image, drag_setStartPos, float(entity, vector))
11 METHOD(Image, drag, float(entity, vector))
12 ATTRIB(Image, src, string, string_null)
13 ATTRIB(Image, color, vector, '1 1 1')
14 ATTRIB(Image, forcedAspect, float, 0) // special values: -1 keep image aspect ratio, -2 keep image size but bound to the containing box, -3 always keep image size
15 ATTRIB(Image, zoomBox, float, 0) // used by forcedAspect -2 when the image is larger than the containing box
16 ATTRIB(Image, zoomFactor, float, 1)
17 ATTRIB(Image, zoomOffset, vector, '0.5 0.5 0')
18 ATTRIB(Image, zoomSnapToTheBox, float, 1) // snap the zoomed in image to the box borders when zooming/dragging it
19 ATTRIB(Image, zoomTime, float, 0)
20 ATTRIB(Image, zoomLimitedByTheBox, float, 0) // forbids zoom if image would be larger than the containing box
21 ATTRIB(Image, zoomMax, float, 0)
22 ATTRIB(Image, start_zoomOffset, vector, '0 0 0')
23 ATTRIB(Image, start_coords, vector, '0 0 0')
24 ATTRIB(Image, imgOrigin, vector, '0 0 0')
25 ATTRIB(Image, imgSize, vector, '0 0 0')
30 string Image_toString(entity me)
34 void Image_configureImage(entity me, string path)
38 void Image_initZoom(entity me)
40 me.zoomOffset = '0.5 0.5 0';
42 if (me.forcedAspect == -2)
43 me.zoomBox = -1; // calculate zoomBox at the first updateAspect call
44 if (me.zoomLimitedByTheBox)
45 me.zoomMax = -1; // calculate zoomMax at the first updateAspect call
48 void Image_draw(entity me)
50 if(me.imgSize_x > 1 || me.imgSize_y > 1)
52 draw_Picture(me.imgOrigin, me.src, me.imgSize, me.color, 1);
53 if(me.imgSize_x > 1 || me.imgSize_y > 1)
55 SUPER(Image).draw(me);
57 void Image_updateAspect(entity me)
60 if(me.size_x <= 0 || me.size_y <= 0)
62 if(me.forcedAspect == 0)
64 me.imgOrigin = '0 0 0';
70 if(me.forcedAspect < 0)
72 sz = draw_PictureSize(me.src);
76 asp = me.forcedAspect;
78 if(me.forcedAspect <= -2)
80 me.imgSize_x = sz_x / me.size_x;
81 me.imgSize_y = sz_y / me.size_y;
82 if(me.zoomBox < 0 && (me.imgSize_x > 1 || me.imgSize_y > 1))
84 // image larger than the containing box, zoom it out to fit into the box
85 if(me.size_x > asp * me.size_y)
86 me.zoomBox = (me.size_y * asp / me.size_x) / me.imgSize_x;
88 me.zoomBox = (me.size_x / (asp * me.size_y)) / me.imgSize_y;
89 me.zoomFactor = me.zoomBox;
94 if(me.size_x > asp * me.size_y)
96 // x too large, so center x-wise
97 me.imgSize = eY + eX * (me.size_y * asp / me.size_x);
101 // y too large, so center y-wise
102 me.imgSize = eX + eY * (me.size_x / (asp * me.size_y));
110 me.zoomMax = me.zoomBox;
113 if(me.size_x > asp * me.size_y)
114 me.zoomMax = (me.size_y * asp / me.size_x) / me.imgSize_x;
116 me.zoomMax = (me.size_x / (asp * me.size_y)) / me.imgSize_y;
120 if (me.zoomMax > 0 && me.zoomFactor > me.zoomMax)
121 me.zoomFactor = me.zoomMax;
123 me.imgSize = me.imgSize * me.zoomFactor;
125 if(me.imgSize_x > 1 || me.imgSize_y > 1)
127 if(me.zoomSnapToTheBox)
130 me.zoomOffset_x = bound(0.5/me.imgSize_x, me.zoomOffset_x, 1 - 0.5/me.imgSize_x);
132 me.zoomOffset_x = bound(1 - 0.5/me.imgSize_x, me.zoomOffset_x, 0.5/me.imgSize_x);
135 me.zoomOffset_y = bound(0.5/me.imgSize_y, me.zoomOffset_y, 1 - 0.5/me.imgSize_y);
137 me.zoomOffset_y = bound(1 - 0.5/me.imgSize_y, me.zoomOffset_y, 0.5/me.imgSize_y);
141 me.zoomOffset_x = bound(0, me.zoomOffset_x, 1);
142 me.zoomOffset_y = bound(0, me.zoomOffset_y, 1);
146 me.zoomOffset = '0.5 0.5 0';
148 me.imgOrigin_x = 0.5 - me.zoomOffset_x * me.imgSize_x;
149 me.imgOrigin_y = 0.5 - me.zoomOffset_y * me.imgSize_y;
151 float Image_drag_setStartPos(entity me, vector coords)
153 //if(me.imgSize_x > 1 || me.imgSize_y > 1) // check disabled: mousewheel zoom may start from a non-zoomed-in image
155 me.start_zoomOffset = me.zoomOffset;
156 me.start_coords = coords;
160 float Image_drag(entity me, vector coords)
162 if(me.imgSize_x > 1 || me.imgSize_y > 1)
164 me.zoomOffset_x = me.start_zoomOffset_x + (me.start_coords_x - coords_x) / me.imgSize_x;
165 me.zoomOffset_y = me.start_zoomOffset_y + (me.start_coords_y - coords_y) / me.imgSize_y;
170 void Image_setZoom(entity me, float z, float atMousePosition)
172 float prev_zoomFactor;
173 prev_zoomFactor = me.zoomFactor;
174 if (z < 0) // multiply by the current zoomFactor (but can also snap to real dimensions or to box)
177 float realSize_in_the_middle, boxSize_in_the_middle;
178 realSize_in_the_middle = ((prev_zoomFactor - 1) * (me.zoomFactor - 1) < 0);
179 boxSize_in_the_middle = (me.zoomBox > 0 && (prev_zoomFactor - me.zoomBox) * (me.zoomFactor - me.zoomBox) < 0);
180 if (realSize_in_the_middle && boxSize_in_the_middle)
182 // snap to real dimensions or to box
183 if (prev_zoomFactor < me.zoomFactor)
184 me.zoomFactor = min(1, me.zoomBox);
186 me.zoomFactor = max(1, me.zoomBox);
188 else if (realSize_in_the_middle)
189 me.zoomFactor = 1; // snap to real dimensions
190 else if (boxSize_in_the_middle)
191 me.zoomFactor = me.zoomBox; // snap to box
193 else if (z == 0) // reset (no zoom)
196 me.zoomFactor = me.zoomBox;
202 me.zoomFactor = bound(1/16, me.zoomFactor, 16);
203 if (me.zoomMax > 0 && me.zoomFactor > me.zoomMax)
204 me.zoomFactor = me.zoomMax;
205 if (prev_zoomFactor != me.zoomFactor)
210 me.zoomOffset_x = me.start_zoomOffset_x + (me.start_coords_x - 0.5) / me.imgSize_x;
211 me.zoomOffset_y = me.start_zoomOffset_y + (me.start_coords_y - 0.5) / me.imgSize_y;
212 // updateAspect will reset zoomOffset to '0.5 0.5 0' if
213 // with this zoomFactor the image will not be zoomed in
214 // (updateAspect will check the new values of imgSize).
219 void Image_resizeNotify(entity me, vector relOrigin, vector relSize, vector absOrigin, vector absSize)
221 SUPER(Image).resizeNotify(me, relOrigin, relSize, absOrigin, absSize);