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);
73 if(sz_x <= 0 || sz_y <= 0)
75 // image is broken or doesn't exist, set the size for the placeholder image
82 asp = me.forcedAspect;
84 if(me.forcedAspect <= -2)
86 me.imgSize_x = sz_x / me.size_x;
87 me.imgSize_y = sz_y / me.size_y;
88 if(me.zoomBox < 0 && (me.imgSize_x > 1 || me.imgSize_y > 1))
90 // image larger than the containing box, zoom it out to fit into the box
91 if(me.size_x > asp * me.size_y)
92 me.zoomBox = (me.size_y * asp / me.size_x) / me.imgSize_x;
94 me.zoomBox = (me.size_x / (asp * me.size_y)) / me.imgSize_y;
95 me.zoomFactor = me.zoomBox;
100 if(me.size_x > asp * me.size_y)
102 // x too large, so center x-wise
103 me.imgSize = eY + eX * (me.size_y * asp / me.size_x);
107 // y too large, so center y-wise
108 me.imgSize = eX + eY * (me.size_x / (asp * me.size_y));
116 me.zoomMax = me.zoomBox;
119 if(me.size_x > asp * me.size_y)
120 me.zoomMax = (me.size_y * asp / me.size_x) / me.imgSize_x;
122 me.zoomMax = (me.size_x / (asp * me.size_y)) / me.imgSize_y;
126 if (me.zoomMax > 0 && me.zoomFactor > me.zoomMax)
127 me.zoomFactor = me.zoomMax;
129 me.imgSize = me.imgSize * me.zoomFactor;
131 if(me.imgSize_x > 1 || me.imgSize_y > 1)
133 if(me.zoomSnapToTheBox)
136 me.zoomOffset_x = bound(0.5/me.imgSize_x, me.zoomOffset_x, 1 - 0.5/me.imgSize_x);
138 me.zoomOffset_x = bound(1 - 0.5/me.imgSize_x, me.zoomOffset_x, 0.5/me.imgSize_x);
141 me.zoomOffset_y = bound(0.5/me.imgSize_y, me.zoomOffset_y, 1 - 0.5/me.imgSize_y);
143 me.zoomOffset_y = bound(1 - 0.5/me.imgSize_y, me.zoomOffset_y, 0.5/me.imgSize_y);
147 me.zoomOffset_x = bound(0, me.zoomOffset_x, 1);
148 me.zoomOffset_y = bound(0, me.zoomOffset_y, 1);
152 me.zoomOffset = '0.5 0.5 0';
154 me.imgOrigin_x = 0.5 - me.zoomOffset_x * me.imgSize_x;
155 me.imgOrigin_y = 0.5 - me.zoomOffset_y * me.imgSize_y;
157 float Image_drag_setStartPos(entity me, vector coords)
159 //if(me.imgSize_x > 1 || me.imgSize_y > 1) // check disabled: mousewheel zoom may start from a non-zoomed-in image
161 me.start_zoomOffset = me.zoomOffset;
162 me.start_coords = coords;
166 float Image_drag(entity me, vector coords)
168 if(me.imgSize_x > 1 || me.imgSize_y > 1)
170 me.zoomOffset_x = me.start_zoomOffset_x + (me.start_coords_x - coords_x) / me.imgSize_x;
171 me.zoomOffset_y = me.start_zoomOffset_y + (me.start_coords_y - coords_y) / me.imgSize_y;
176 void Image_setZoom(entity me, float z, float atMousePosition)
178 float prev_zoomFactor;
179 prev_zoomFactor = me.zoomFactor;
180 if (z < 0) // multiply by the current zoomFactor (but can also snap to real dimensions or to box)
183 float realSize_in_the_middle, boxSize_in_the_middle;
184 realSize_in_the_middle = ((prev_zoomFactor - 1) * (me.zoomFactor - 1) < 0);
185 boxSize_in_the_middle = (me.zoomBox > 0 && (prev_zoomFactor - me.zoomBox) * (me.zoomFactor - me.zoomBox) < 0);
186 if (realSize_in_the_middle && boxSize_in_the_middle)
188 // snap to real dimensions or to box
189 if (prev_zoomFactor < me.zoomFactor)
190 me.zoomFactor = min(1, me.zoomBox);
192 me.zoomFactor = max(1, me.zoomBox);
194 else if (realSize_in_the_middle)
195 me.zoomFactor = 1; // snap to real dimensions
196 else if (boxSize_in_the_middle)
197 me.zoomFactor = me.zoomBox; // snap to box
199 else if (z == 0) // reset (no zoom)
202 me.zoomFactor = me.zoomBox;
208 me.zoomFactor = bound(1/16, me.zoomFactor, 16);
209 if (me.zoomMax > 0 && me.zoomFactor > me.zoomMax)
210 me.zoomFactor = me.zoomMax;
211 if (prev_zoomFactor != me.zoomFactor)
216 me.zoomOffset_x = me.start_zoomOffset_x + (me.start_coords_x - 0.5) / me.imgSize_x;
217 me.zoomOffset_y = me.start_zoomOffset_y + (me.start_coords_y - 0.5) / me.imgSize_y;
218 // updateAspect will reset zoomOffset to '0.5 0.5 0' if
219 // with this zoomFactor the image will not be zoomed in
220 // (updateAspect will check the new values of imgSize).
225 void Image_resizeNotify(entity me, vector relOrigin, vector relSize, vector absOrigin, vector absSize)
227 SUPER(Image).resizeNotify(me, relOrigin, relSize, absOrigin, absSize);