Mercurial > projects > doodle
annotate canvas.d @ 11:fb571a3b1f0d
Checkpoint
| author | "David Bryant <bagnose@gmail.com>" |
|---|---|
| date | Sat, 11 Jul 2009 23:32:22 +0930 |
| parents | 71ca82e0eb76 |
| children | a093c4fbdd43 |
| rev | line source |
|---|---|
| 0 | 1 module canvas; |
| 2 | |
| 3 import std.stdio; | |
| 4 import std.math; | |
| 5 | |
| 6 import cairo.Context; | |
| 7 import cairo.Surface; | |
| 8 | |
| 9 import gdk.Drawable; | |
| 10 | |
| 11 import gtk.Widget; | |
| 12 import gtk.Toolbar; | |
| 13 import gtk.Table; | |
| 14 import gtk.HRuler; | |
| 15 import gtk.VRuler; | |
| 16 import gtk.Range; | |
| 17 import gtk.HScrollbar; | |
| 18 import gtk.VScrollbar; | |
| 19 import gtk.DrawingArea; | |
| 20 import gtk.Adjustment; | |
| 21 | |
| 22 import tk.misc; | |
|
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23 import tk.geometry; |
| 0 | 24 import tk.types; |
| 25 import tk.events; | |
| 26 import tk.gtk_support; | |
| 27 | |
| 28 private import gtkc.gtk; | |
| 29 | |
| 30 import icanvas; | |
|
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31 import cairo_support; |
| 0 | 32 |
| 33 // x and y run right and up respectively | |
| 34 | |
| 10 | 35 class Canvas : Table, Viewport { |
| 11 | 36 this(in Layer[] layers, EventHandler event_handler, in double ppi) { |
| 0 | 37 super(3, 3, 0); |
| 38 | |
| 11 | 39 mLayers = layers.dup; |
| 0 | 40 mEventHandler = event_handler; |
| 41 | |
| 42 const double MM_PER_INCH = 25.4; | |
| 11 | 43 mZoom = 0.25 * ppi / MM_PER_INCH; |
| 44 | |
| 45 Rectangle total_layer_bounds; | |
| 0 | 46 |
| 11 | 47 foreach (ref layer; mLayers) { |
| 48 total_layer_bounds = total_layer_bounds | layer.bounds; | |
| 49 } | |
| 0 | 50 |
| 11 | 51 mCanvasLeftBottom = total_layer_bounds.min_corner - total_layer_bounds.size; |
| 52 mCanvasRightTop = total_layer_bounds.max_corner + total_layer_bounds.size; | |
| 53 mViewCentre = mCanvasLeftBottom + (mCanvasRightTop - mCanvasLeftBottom) / 2.0; | |
| 0 | 54 |
| 55 mHRuler = new HRuler(); | |
| 56 attach(mHRuler, | |
| 57 1, 2, | |
| 58 0, 1, | |
| 59 AttachOptions.FILL | AttachOptions.EXPAND, AttachOptions.SHRINK, | |
| 60 0, 0); | |
| 61 mHRuler.setMetric(GtkMetricType.CENTIMETERS); | |
| 62 | |
| 63 mVRuler = new VRuler(); | |
| 64 attach(mVRuler, | |
| 65 0, 1, | |
| 66 1, 2, | |
| 67 AttachOptions.SHRINK, AttachOptions.FILL | AttachOptions.EXPAND, | |
| 68 0, 0); | |
| 69 mVRuler.setMetric(GtkMetricType.CENTIMETERS); | |
| 70 | |
| 71 mDrawingArea = new DrawingArea(); | |
| 72 mDrawingArea.addOnRealize(&onRealize); | |
| 73 mDrawingArea.addOnConfigure(&onConfigure); | |
| 74 mDrawingArea.addOnExpose(&onExpose); | |
| 5 | 75 mDrawingArea.addOnButtonPress(&onButtonPress); |
| 76 mDrawingArea.addOnButtonRelease(&onButtonRelease); | |
| 0 | 77 mDrawingArea.addOnKeyPress(&onKeyEvent); |
| 78 mDrawingArea.addOnKeyRelease(&onKeyEvent); | |
| 79 mDrawingArea.addOnMotionNotify(&onMotionNotify); | |
| 80 mDrawingArea.addOnScroll(&onScroll); | |
| 81 attach(mDrawingArea, | |
| 82 1, 2, | |
| 83 1, 2, | |
| 84 AttachOptions.FILL | AttachOptions.EXPAND, AttachOptions.FILL | AttachOptions.EXPAND, | |
| 85 0, 0); | |
| 86 | |
| 87 // value, lower, upper, step-inc, page-inc, page-size | |
| 88 // Give the adjustments dummy values until we receive a configure | |
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89 mHAdjustment = new Adjustment(0.25, 0.0, 1.0, 0.2, 0.5, 0.5); |
| 0 | 90 mHAdjustment.addOnValueChanged(&onValueChanged); |
| 91 mHScrollbar = new HScrollbar(mHAdjustment); | |
| 92 attach(mHScrollbar, | |
| 93 1, 2, | |
| 94 2, 3, | |
| 95 AttachOptions.FILL | AttachOptions.EXPAND, AttachOptions.SHRINK, | |
| 96 0, 0); | |
| 97 | |
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98 mVAdjustment = new Adjustment(0.0, 0.0, 1.0, 0.2, 0.5, 0.5); |
| 0 | 99 mVAdjustment.addOnValueChanged(&onValueChanged); |
| 100 mVScrollbar = new VScrollbar(mVAdjustment); | |
| 101 attach(mVScrollbar, | |
| 102 2, 3, | |
| 103 1, 2, | |
| 104 AttachOptions.SHRINK, | |
| 105 AttachOptions.FILL | AttachOptions.EXPAND, | |
| 106 0, 0); | |
| 107 } | |
| 108 | |
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109 override void rel_zoom(Point screen_datum, double factor) { |
| 0 | 110 // Work out pixel distance from current centre to datum, |
| 111 // Do the zoom, then work out the new centre that keeps the | |
| 112 // pixel distance the same | |
| 113 | |
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114 Point old_model_datum = screen_to_model(screen_datum); |
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115 Vector pixel_distance = model_to_screen(old_model_datum - mViewCentre); |
| 0 | 116 mZoom = clamp_zoom(factor * mZoom); |
| 117 mViewCentre = old_model_datum - screen_to_model(pixel_distance); | |
| 118 | |
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119 Point new_model_datum = screen_to_model(screen_datum); |
| 0 | 120 |
| 121 update_adjustments(); | |
| 122 //update_rulers(new_model_datum); | |
| 123 update_rulers(); | |
| 124 queueDraw(); | |
| 125 } | |
| 126 | |
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127 override void rel_pan(Vector screen_displacement) { |
| 0 | 128 mViewCentre = mViewCentre + screen_to_model(screen_displacement); |
| 129 | |
| 130 update_adjustments(); | |
| 131 update_rulers(); | |
| 132 queueDraw(); | |
| 133 } | |
| 134 | |
| 11 | 135 override double zoom() const { return mZoom; } |
| 136 override Point model_to_screen(Point model) const { return Point.DEFAULT + mViewSize / 2.0 + mZoom * (model - mViewCentre); } | |
| 137 override Point screen_to_model(Point screen) const { return mViewCentre + (screen - mViewSize / 2.0 - Point.DEFAULT) / mZoom; } | |
| 10 | 138 override Vector model_to_screen(Vector model) const { return mZoom * model; } |
| 139 override Vector screen_to_model(Vector screen) const { return screen / mZoom; } | |
| 140 override double model_to_screen(double model) const { return mZoom * model; } | |
| 141 override double screen_to_model(double screen) const { return screen / mZoom; } | |
| 11 | 142 override Rectangle model_to_screen(Rectangle model) const { return Rectangle(model_to_screen(model.position), model_to_screen(model.size)); } |
| 143 override Rectangle screen_to_model(Rectangle model) const { return Rectangle(screen_to_model(model.position), screen_to_model(model.size)); } | |
| 10 | 144 |
| 0 | 145 private { |
| 146 | |
| 147 void onRealize(Widget widget) { | |
| 148 assert(widget is mDrawingArea); | |
| 149 //writefln("Got realize\n"); | |
| 150 } | |
| 151 | |
| 152 bool onConfigure(GdkEventConfigure * event, Widget widget) { | |
| 153 assert(widget is mDrawingArea); | |
| 154 | |
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155 mViewSize = Vector(cast(double)event.width, cast(double)event.height); |
| 0 | 156 update_adjustments(); |
| 157 update_rulers(); | |
| 158 | |
| 159 | |
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160 return true; |
| 0 | 161 } |
| 162 | |
| 163 bool onExpose(GdkEventExpose * event, Widget widget) { | |
| 164 assert(widget is mDrawingArea); | |
| 165 | |
| 166 Drawable dr = mDrawingArea.getWindow(); | |
| 167 | |
| 168 int width, height; | |
| 169 dr.getSize(width, height); | |
| 170 //writefln("Got expose %dx%d\n", width, height); | |
| 171 | |
| 5 | 172 scope cr = new Context(dr); |
| 11 | 173 Rectangle damage = |
| 174 event is null ? | |
| 175 Rectangle(Point(0.0, 0.0), Vector(cast(double)width, cast(double)height)) : | |
| 176 Rectangle(Point(cast(double)event.area.x, cast(double)event.area.y), | |
| 177 Vector(cast(double)event.area.width, cast(double)event.area.height)); | |
| 0 | 178 |
| 11 | 179 cr.save(); { |
| 180 rectangle(cr, damage); | |
| 0 | 181 cr.clip(); |
| 182 | |
| 11 | 183 cr.save(); { |
| 184 // Make the window light grey | |
| 185 cr.setSourceRgba(1.0, 1.0, 1.0, 0.7); | |
| 186 rectangle(cr, damage); | |
| 187 cr.fill(); | |
| 188 } cr.restore(); | |
| 0 | 189 |
| 11 | 190 foreach(ref layer; mLayers) { |
| 191 layer.draw(this, damage, cr); | |
| 192 } | |
| 193 } cr.restore(); | |
| 0 | 194 |
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195 return true; |
| 0 | 196 } |
| 197 | |
| 5 | 198 bool onButtonPress(GdkEventButton * event, Widget widget) { |
| 0 | 199 assert(widget is mDrawingArea); |
| 200 //writefln("Got button event\n"); | |
| 201 | |
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202 Point screen_point = Point(event.x + 0.5, event.y + 0.5); |
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203 Point model_point = screen_to_model(screen_point); |
| 0 | 204 |
| 7 | 205 auto button_event = new ButtonEvent(gtk2tk_button_action(event.type), |
| 206 gtk2tk_button_name(event.button), | |
| 0 | 207 screen_point, |
| 208 model_point, | |
| 209 gtk2tk_mask(event.state)); | |
| 210 | |
| 5 | 211 mEventHandler.handle_button_press(this, button_event); |
| 212 | |
| 213 return true; | |
| 214 } | |
| 215 | |
| 216 bool onButtonRelease(GdkEventButton * event, Widget widget) { | |
| 217 assert(widget is mDrawingArea); | |
| 218 //writefln("Got button event\n"); | |
| 219 | |
| 220 Point screen_point = Point(event.x + 0.5, event.y + 0.5); | |
| 221 Point model_point = screen_to_model(screen_point); | |
| 222 | |
| 7 | 223 auto button_event = new ButtonEvent(gtk2tk_button_action(event.type), |
| 224 gtk2tk_button_name(event.button), | |
| 5 | 225 screen_point, |
| 226 model_point, | |
| 227 gtk2tk_mask(event.state)); | |
| 228 | |
| 229 mEventHandler.handle_button_release(this, button_event); | |
| 0 | 230 |
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231 return true; |
| 0 | 232 } |
| 233 | |
| 234 bool onKeyEvent(GdkEventKey * event, Widget widget) { | |
| 235 assert(widget is mDrawingArea); | |
| 236 //writefln("Got key event\n"); | |
| 237 | |
| 238 //auto key_event = new KeyEvent("", | |
| 239 // mEventHandle.handle_key(key_event); | |
| 240 | |
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241 return true; |
| 0 | 242 } |
| 243 | |
| 244 bool onMotionNotify(GdkEventMotion * event, Widget widget) { | |
| 245 assert(widget is mDrawingArea); | |
| 246 //writefln("Got motion notify\n"); | |
| 247 gtk_widget_event(mHRuler.getWidgetStruct(), cast(GdkEvent *)event); | |
| 248 gtk_widget_event(mVRuler.getWidgetStruct(), cast(GdkEvent *)event); | |
| 249 | |
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250 Point screen_point = Point(event.x + 0.5, event.y + 0.5); |
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251 Point model_point = screen_to_model(screen_point); |
| 0 | 252 |
| 253 auto motion_event = new MotionEvent(screen_point, | |
| 254 model_point, | |
| 255 gtk2tk_mask(event.state)); | |
| 256 | |
| 257 mEventHandler.handle_motion(this, motion_event); | |
| 258 | |
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259 return true; |
| 0 | 260 } |
| 261 | |
| 262 bool onScroll(GdkEventScroll * event, Widget widget) { | |
| 263 assert(widget is mDrawingArea); | |
| 264 //writefln("Got scroll\n"); | |
| 265 | |
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266 Point screen_point = Point(event.x + 0.5, event.y + 0.5); |
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267 Point model_point = screen_to_model(screen_point); |
| 0 | 268 |
| 269 auto scroll_event = new ScrollEvent(gtk2tk_direction(event.direction), | |
| 270 screen_point, | |
| 271 model_point, | |
| 272 gtk2tk_mask(event.state)); | |
| 273 | |
| 274 mEventHandler.handle_scroll(this, scroll_event); | |
| 275 | |
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276 return true; |
| 0 | 277 } |
| 278 | |
| 279 void onValueChanged(Adjustment adjustment) { | |
| 280 GtkAdjustment * h_gtkAdjustment = mHAdjustment.getAdjustmentStruct(); | |
| 281 GtkAdjustment * v_gtkAdjustment = mVAdjustment.getAdjustmentStruct(); | |
| 282 | |
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283 Point view_left_bottom = Point(gtk_adjustment_get_value(h_gtkAdjustment), |
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284 gtk_adjustment_get_value(v_gtkAdjustment)); |
| 9 | 285 //writefln("%s", view_left_bottom); |
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286 Vector model_size = screen_to_model(mViewSize); |
| 0 | 287 mViewCentre = view_left_bottom + model_size / 2.0; |
| 288 | |
| 289 update_rulers(); | |
| 290 | |
| 291 queueDraw(); | |
| 292 } | |
| 293 | |
| 294 void update_rulers() { | |
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295 Vector model_size = screen_to_model(mViewSize); |
| 0 | 296 |
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297 Point view_left_bottom = mViewCentre - model_size / 2.0; |
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298 Point view_right_top = mViewCentre + model_size / 2.0; |
| 0 | 299 |
| 300 mHRuler.setRange(view_left_bottom.x, | |
| 301 view_right_top.x, | |
| 302 0.0, // TODO preserve the value | |
| 303 mZoom * 2000.0); | |
| 304 mVRuler.setRange(view_right_top.y, | |
| 305 view_left_bottom.y, | |
| 306 0.0, | |
| 307 mZoom * 2000.0); | |
| 308 } | |
| 309 | |
| 310 void update_adjustments() { | |
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311 Vector model_size = screen_to_model(mViewSize); |
| 0 | 312 |
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313 Point view_left_bottom = mViewCentre - model_size / 2.0; |
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314 Point view_right_top = mViewCentre + model_size / 2.0; |
| 0 | 315 |
| 316 // Adjust the canvas size if necessary | |
| 317 mCanvasLeftBottom = min_extents(mCanvasLeftBottom, view_left_bottom); | |
| 318 mCanvasRightTop = max_extents(mCanvasRightTop, view_right_top); | |
| 319 | |
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320 Vector canvas_size = mCanvasRightTop - mCanvasLeftBottom; |
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321 Vector page_size = mPageRightTop - mPageLeftBottom; |
| 0 | 322 |
| 323 // Update the adjustments | |
| 324 | |
| 325 GtkAdjustment * h_gtkAdjustment = mHAdjustment.getAdjustmentStruct(); | |
| 326 GtkAdjustment * v_gtkAdjustment = mVAdjustment.getAdjustmentStruct(); | |
| 327 | |
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328 gtk_adjustment_set_lower(h_gtkAdjustment, mCanvasLeftBottom.x); |
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329 gtk_adjustment_set_upper(h_gtkAdjustment, mCanvasRightTop.x); |
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330 gtk_adjustment_set_value(h_gtkAdjustment, view_left_bottom.x); |
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331 gtk_adjustment_set_step_increment(h_gtkAdjustment, canvas_size.x / 10.0); |
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332 gtk_adjustment_set_page_increment(h_gtkAdjustment, canvas_size.x / 5.0); |
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333 gtk_adjustment_set_page_size(h_gtkAdjustment, model_size.x); |
| 0 | 334 |
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335 gtk_adjustment_set_lower(v_gtkAdjustment, mCanvasLeftBottom.y); |
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336 gtk_adjustment_set_upper(v_gtkAdjustment, mCanvasRightTop.y); |
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337 gtk_adjustment_set_value(v_gtkAdjustment, view_left_bottom.y); |
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338 gtk_adjustment_set_step_increment(v_gtkAdjustment, canvas_size.y / 10.0); |
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339 gtk_adjustment_set_page_increment(v_gtkAdjustment, canvas_size.y / 5.0); |
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340 gtk_adjustment_set_page_size(v_gtkAdjustment, model_size.y); |
| 0 | 341 |
| 342 mHAdjustment.changed(); | |
| 343 mHAdjustment.valueChanged(); | |
| 344 mVAdjustment.changed(); | |
| 345 mVAdjustment.valueChanged(); | |
| 346 } | |
| 347 | |
| 9 | 348 double clamp_zoom(double zoom) { return clamp(zoom, 0.02, 50.0); } |
| 0 | 349 |
| 10 | 350 EventHandler mEventHandler; |
| 0 | 351 |
| 352 // Model units are in millimetres | |
| 353 // Screen units are in pixels | |
| 354 | |
| 11 | 355 double mZoom; // pixels-per-model-unit (mm) |
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356 Point mViewCentre; // model: where in the model is the centre of our view |
| 0 | 357 |
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7d57cae10805
Renamed geometry2 to geometry
David Bryant <daveb@acres.com.au>
parents:
2
diff
changeset
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358 Point mCanvasLeftBottom; // model: bottom left corner of canvas |
|
7d57cae10805
Renamed geometry2 to geometry
David Bryant <daveb@acres.com.au>
parents:
2
diff
changeset
|
359 Point mCanvasRightTop; // model: top right corner of canvas |
|
7d57cae10805
Renamed geometry2 to geometry
David Bryant <daveb@acres.com.au>
parents:
2
diff
changeset
|
360 Point mPageLeftBottom; // model: bottom left corner of page |
|
7d57cae10805
Renamed geometry2 to geometry
David Bryant <daveb@acres.com.au>
parents:
2
diff
changeset
|
361 Point mPageRightTop; // model: top right corner of page |
| 0 | 362 |
|
3
7d57cae10805
Renamed geometry2 to geometry
David Bryant <daveb@acres.com.au>
parents:
2
diff
changeset
|
363 Vector mViewSize; // screen: size of view window in pixels |
| 0 | 364 |
| 10 | 365 // Child widgets: |
| 0 | 366 HRuler mHRuler; |
| 367 VRuler mVRuler; | |
| 368 DrawingArea mDrawingArea; | |
| 369 Adjustment mHAdjustment; | |
| 370 HScrollbar mHScrollbar; | |
| 371 Adjustment mVAdjustment; | |
| 372 VScrollbar mVScrollbar; | |
| 11 | 373 |
| 374 // Layers: | |
| 375 Layer[] mLayers; | |
| 0 | 376 } |
| 377 } |