-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathVDoubleScroll.m
413 lines (337 loc) · 16.3 KB
/
VDoubleScroll.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
classdef VDoubleScroll < hgsetget
% class VDoubleScroll: gui object that makes a vertical double scroll bar.
% A double scroll bar is a gui tool for selecting a range between a
% minimum and a maximum - for instance it can be used to set the
% minimum and maximum color limits for an image.
%
% @file: VDoubleScroll.m
% @brief: gui object that creates a double scroll bar.
% @author: Paxon Frady
% @created: 6/14/11
properties (AbortSet)
h; % graphic object handles.
gui; % settings for the gui.
BgColor; % Background color.
Color; % Color of the rectangle.
Position; % Position of the axes.
Parent;
Visible;
MinStep; % Minimum amount difference between
Value; % The low (Value(1)) and high (Value(2)) values.
Min = 0; % The minimum
Max = 1; % The maximum
end
events
SelectionChanged; % Whenever the range selected changes.
end
methods
%%%%%%%%%% Initialization %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function self = VDoubleScroll(parent)
% constructor: creates a new DoubleScroll object.
%
% @param: parent the handle of the parent of this object. If no
% parent is given, gcf will be used.
% @return: self handle to the gui object.
if nargin < 1
parent = [];
end
self = self.init_state();
self = self.init_gui(parent);
self.update();
end
function self = init_state(self)
% init_state: initializes the state variables used. This sets
% the defaults.
self.BgColor = [0.95 0.95 0.95];
self.Color = [0 0 0];
self.Position = [50 100 20 300];
self.MinStep = 0.01;
self.Value(1) = self.Min;
self.Value(2) = self.Max;
self.gui.BUTTON_H = 40;
self.gui.drag_size = 0.05;
end
function self = init_gui(self, parent)
% init_gui: initializes the gui. Creates all of the gui
% components.
%
% @param: parent the parent figure. If none is given, then gcf
% will be used as the parent.
if nargin < 2 || isempty(parent)
% No parent given, use gcf.
parent = gcf;
end
self.h.parent = parent;
% Get the parent figure and set it as an event notifier.
fh = parent;
while ~strcmp(get(fh, 'Type'), 'figure')
% The last object is not a figure go up.
fh = get(fh, 'Parent');
end
self.h.fh = fh;
self.h.fen = FigureEventNotifier(self.h.fh);
self.h.panel = uipanel(self.h.parent, 'Units', 'pixels', ...
'Position', self.Position, 'BorderType', 'none', ...
'BackgroundColor', self.BgColor);
self.h.ds_axes = axes('Box', 'off', 'XTick', [], 'YTick', [], ...
'Color', self.BgColor, 'XColor', self.BgColor, 'NextPlot', 'add', ...
'YColor', self.BgColor, 'Units', 'normalized', 'Position', [0 0 1 1]);
ylim(self.h.ds_axes, [self.Min self.Max]);
xlim(self.h.ds_axes, [0 1]);
self.h.ds_ax_aen = AxesEventNotifier(self.h.ds_axes);
addlistener(self.h.ds_ax_aen, 'ButtonDown', @self.rect_button_down_cb);
self.h.rect = rectangle('Parent', self.h.ds_axes, ...
'EdgeColor', self.Color, 'FaceColor', self.Color, ...
'Position', [0 self.Min 1 self.Max]);
set(self.h.rect, 'ButtonDownFcn', @self.rect_button_down_cb);
self.h.min_drag_line = plot(self.h.ds_axes, [0 1], ...
[self.gui.drag_size * (self.Max - self.Min), self.gui.drag_size * (self.Max - self.Min)], ...
'Color', [0.5 0.5 0.5]);
self.h.max_drag_line = plot(self.h.ds_axes, [0 1], ...
[(1 - self.gui.drag_size) * (self.Max - self.Min), (1 - self.gui.drag_size) * (self.Max - self.Min)], ...
'Color', [0.5 0.5 0.5]);
self.h.min_dec_button = uicontrol('Style', 'pushbutton', 'String', '<', 'Callback', @self.min_dec_cb);
self.h.min_inc_button = uicontrol('Style', 'pushbutton', 'String', '>', 'Callback', @self.min_inc_cb);
self.h.max_dec_button = uicontrol('Style', 'pushbutton', 'String', '<', 'Callback', @self.max_dec_cb);
self.h.max_inc_button = uicontrol('Style', 'pushbutton', 'String', '>', 'Callback', @self.max_inc_cb);
self.h.min_edit = uicontrol('Style', 'edit', 'Callback', @self.min_edit_cb);
self.h.max_edit = uicontrol('Style', 'edit', 'Callback', @self.max_edit_cb);
self = self.uiextras_layout();
self.update();
end
function self = uiextras_layout(self)
self.h.main_vbox = uiextras.VBox();
self.h.max_control_vbox = uiextras.VBox();
self.h.max_button_hbox = uiextras.HBox();
self.h.min_control_vbox = uiextras.VBox();
self.h.min_button_hbox = uiextras.HBox();
% Top hierarchy
set(self.h.main_vbox, 'Parent', self.h.panel);
set(self.h.max_control_vbox, 'Parent', self.h.main_vbox);
set(self.h.ds_axes, 'Parent', self.h.main_vbox.double());
set(self.h.min_control_vbox, 'Parent', self.h.main_vbox);
% Max controls
set(self.h.max_edit, 'Parent', self.h.max_control_vbox.double());
set(self.h.max_button_hbox, 'Parent', self.h.max_control_vbox);
set(self.h.max_dec_button, 'Parent', self.h.max_button_hbox.double());
set(self.h.max_inc_button, 'Parent', self.h.max_button_hbox.double());
% Min Controls
set(self.h.min_button_hbox, 'Parent', self.h.min_control_vbox);
set(self.h.min_dec_button, 'Parent', self.h.min_button_hbox.double());
set(self.h.min_inc_button, 'Parent', self.h.min_button_hbox.double());
set(self.h.min_edit, 'Parent', self.h.min_control_vbox.double());
set(self.h.main_vbox, 'Sizes', [self.gui.BUTTON_H, -1, self.gui.BUTTON_H]);
end
%%%%%%%%%% Callbacks %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function rect_button_down_cb(self, source_h, eventdata)
% rect_button_down_cb: handles when the mouse is pressed on the
% rectangle.
if self.h.fen.button_down == 4
% Then the rectangle was double clicked. Make it maximum.
self.set_max_range();
else
self.animate_scroll_drag();
end
end
function min_dec_cb(self, source_h, eventdata)
self.Value(1) = self.Value(1) - self.MinStep;
end
function min_inc_cb(self, source_h, eventdata)
self.Value(1) = self.Value(1) + self.MinStep;
end
function max_dec_cb(self, source_h, eventdata)
self.Value(2) = self.Value(2) - self.MinStep;
end
function max_inc_cb(self, source_h, eventdata)
self.Value(2) = self.Value(2) + self.MinStep;
end
function min_edit_cb(self, source_h, eventdata)
cf = str2num(get(self.h.min_edit, 'String'));
if ~isempty(cf) && length(cf) == 1
% Otherwise the input is invalid
self.Value(1) = cf;
else
self.update();
end
end
function max_edit_cb(self, source_h, eventdata)
cf = str2num(get(self.h.max_edit, 'String'));
if ~isempty(cf) && length(cf) == 1
% Otherwise the input is invalid
self.Value(2) = cf;
else
self.update();
end
end
%%%%%%%%%% Main Functions %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function update(self)
% Updates the gui to make sure it matches with the internal
% state.
% First round to the nearest MinStep value
v = self.Value;
%v = round(v ./ self.MinStep) .* self.MinStep;
% Make sure the limits are correct
v(1) = min(max(v(1), self.Min), self.Max - self.MinStep);
v(2) = min(max(v(2), v(1) + self.MinStep), self.Max);
%self.Value = v;
pos = [0, v(1), 1, v(2) - v(1)];
set(self.h.rect, 'Position', pos);
min_drag_line_y = pos(2) + self.gui.drag_size * (self.Max - self.Min);
max_drag_line_y = pos(2) + pos(4) - self.gui.drag_size * (self.Max - self.Min);
if min_drag_line_y > max_drag_line_y
% Then just do something
mean_drag_line_y = mean([min_drag_line_y, max_drag_line_y]);
min_drag_line_y = mean_drag_line_y;
max_drag_line_y = mean_drag_line_y;
end
set(self.h.min_drag_line, 'YData', [min_drag_line_y, min_drag_line_y]);
set(self.h.max_drag_line, 'YData', [max_drag_line_y, max_drag_line_y]);
set(self.h.min_edit, 'String', num2str(self.Value(1), 2));
set(self.h.max_edit, 'String', num2str(self.Value(2), 2));
drawnow;
end
function set_max_range(self)
self.Value = [self.Min, self.Max];
%self.update();
end
function set.Min(self, value)
if value >= self.Max
self.Max = value + self.MinStep;
end
%self.Value = (self.Max - value) .* (self.Value - self.Min) ./ (self.Max - self.Min) + value;
self.Min = double(value);
%self.Value(1) = self.Min;
if ~isempty(self.h)
ylim(self.h.ds_axes, [self.Min self.Max]);
self.update();
end
end
function set.Max(self, value)
if value <= self.Min
self.Min = value - self.MinStep;
end
%self.Value = value - (value - self.Min).*(self.Max - self.Value) ./ (self.Max - self.Min);
self.Max = double(value);
%self.Value(2) = self.Max;
if ~isempty(self.h)
ylim(self.h.ds_axes, [self.Min self.Max]);
self.update();
end
end
function set.BgColor(self, value)
self.BgColor = value;
if isfield(self.h, 'ds_axes')
set(self.h.ds_axes, 'Color', self.BgColor, ...
'XColor', self.BgColor, 'YColor', self.BgColor);
end
if isfield(self.h, 'panel')
set(self.h.panel, 'BackgroundColor', self.BgColor);
end
end
function set.Color(self, value)
if isfield(self.h, 'rect')
set(self.h.rect, 'FaceColor', value);
set(self.h.rect, 'EdgeColor', value);
self.Color = get(self.h.rect, 'FaceColor');
else
% hmm... I guess do this.
self.Color = value;
end
end
function set.Position(self, value)
self.Position = value;
if isfield(self.h, 'panel')
set(self.h.panel, 'Position', self.Position);
set(self.h.ds_axes, 'Position', [40 5 self.Position(3) - 80 self.Position(4) - 5])
set(self.h.left_dec_h, 'Position', [0 0 20 self.Position(4)]);
set(self.h.left_inc_h, 'Position', [20 0 20 self.Position(4)]);
set(self.h.right_dec_h, 'Position', [self.Position(3) - 40 0 20 self.Position(4)]);
set(self.h.right_inc_h, 'Position', [self.Position(3) - 20 0 20 self.Position(4)]);
end
end
function set.Value(self, value)
%disp(value);
if isequal(self.Value, value)
% Then there's nothing to change
return;
end
v = min(max(double(value), self.Min), self.Max);
if length(v) == 2
v(2) = max(v(2), v(1) + self.MinStep);
end
self.Value = v;
if ~isempty(self.h)
self.update();
end
notify(self, 'SelectionChanged');
end
function self = set.Parent(self, val)
set(self.h.panel, 'Parent', double(val));
end
function val = get.Parent(self)
val = get(self.h.panel, 'Parent');
end
function set.Visible(self, value)
if isfield(self.h, 'panel')
set(self.h.panel, 'Visible', value);
self.Visible = get(self.h.panel, 'Visible');
end
end
%%%%%%%%%% Utility functions %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function animate_scroll_drag(self)
point1 = get(self.h.ds_axes, 'CurrentPoint');
py1 = point1(1,2);
rpos = get(self.h.rect, 'Position');
if (py1 - rpos(2)) < self.gui.drag_size * (self.Max - self.Min)
% Then we are doing a minimum drag
set(self.h.fh, 'Pointer', 'bottom');
pos_change = 1; % 1 for minimum
elseif (py1 - rpos(2)) > rpos(4) - self.gui.drag_size * (self.Max - self.Min)
% Then we are doing a maximum drag
set(self.h.fh, 'Pointer', 'top');
pos_change = -1; % -1 for maximum
else
% Then we are doing a shift
set(self.h.fh, 'Pointer', 'hand');
pos_change = 0; % 0 for shift
end
new_pos = rpos;
while self.h.fen.button_down
point2 = get(self.h.ds_axes, 'CurrentPoint');
py2 = point2(1,2);
dy1 = (py2 - py1);
if pos_change == 1
% then we are moving the min
new_pos(2) = min(max(rpos(2) + dy1, self.Min), self.Value(2) - self.MinStep);
dy2 = rpos(2) - new_pos(2);
new_pos(4) = max(min(rpos(4) + dy2, self.Max - new_pos(2)), self.MinStep);
end
if pos_change == -1
% then we are moving the max.
new_pos(4) = max(min(rpos(4) + dy1, self.Max - rpos(2)), self.MinStep);
end
if pos_change == 0
% then shift.
new_pos(2) = min(max(rpos(2) + dy1, self.Min), self.Max - rpos(4));
end
set(self.h.rect, 'Position', new_pos);
min_drag_line_y = new_pos(2) + self.gui.drag_size * (self.Max - self.Min);
max_drag_line_y = new_pos(2) + new_pos(4) - self.gui.drag_size * (self.Max - self.Min);
if min_drag_line_y > max_drag_line_y
% Then just do something
mean_drag_line_y = mean([min_drag_line_y, max_drag_line_y]);
min_drag_line_y = mean_drag_line_y;
max_drag_line_y = mean_drag_line_y;
end
set(self.h.min_drag_line, 'YData', [min_drag_line_y, min_drag_line_y]);
set(self.h.max_drag_line, 'YData', [max_drag_line_y, max_drag_line_y]);
set(self.h.min_edit, 'String', num2str(new_pos(2), 2));
set(self.h.max_edit, 'String', num2str(new_pos(2) + new_pos(4), 2));
drawnow;
end
self.Value = [new_pos(2), new_pos(2) + new_pos(4)];
set(self.h.fh, 'Pointer', 'arrow');
self.update();
end
end
end