1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/views/SkWidget.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,412 @@
1.4 +/*
1.5 + * Copyright 2006 The Android Open Source Project
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef SkWidget_DEFINED
1.12 +#define SkWidget_DEFINED
1.13 +
1.14 +#include "SkBitmap.h"
1.15 +#include "SkDOM.h"
1.16 +#include "SkPaint.h"
1.17 +#include "SkString.h"
1.18 +#include "SkTDArray.h"
1.19 +#include "SkTextBox.h"
1.20 +#include "SkView.h"
1.21 +
1.22 +class SkEvent;
1.23 +class SkInterpolator;
1.24 +class SkShader;
1.25 +
1.26 +////////////////////////////////////////////////////////////////////////////////
1.27 +
1.28 +class SkWidget : public SkView {
1.29 +public:
1.30 + SkWidget(uint32_t flags = 0) : SkView(flags | kFocusable_Mask | kEnabled_Mask) {}
1.31 +
1.32 + /** Call this to post the widget's event to its listeners */
1.33 + void postWidgetEvent();
1.34 +
1.35 + static void Init();
1.36 + static void Term();
1.37 +protected:
1.38 + // override to add slots to an event before posting
1.39 + virtual void prepareWidgetEvent(SkEvent*);
1.40 + virtual void onEnabledChange();
1.41 +
1.42 + // <event ...> to initialize the event from XML
1.43 + virtual void onInflate(const SkDOM& dom, const SkDOM::Node* node);
1.44 +
1.45 +private:
1.46 + SkEvent fEvent;
1.47 + typedef SkView INHERITED;
1.48 +};
1.49 +
1.50 +////////////////////////////////////////////////////////////////////////////////
1.51 +
1.52 +class SkHasLabelWidget : public SkWidget {
1.53 +public:
1.54 + SkHasLabelWidget(uint32_t flags = 0) : SkWidget(flags) {}
1.55 +
1.56 + size_t getLabel(SkString* label = NULL) const;
1.57 + size_t getLabel(char lable[] = NULL) const;
1.58 + void setLabel(const SkString&);
1.59 + void setLabel(const char label[]);
1.60 + void setLabel(const char label[], size_t len);
1.61 +
1.62 +protected:
1.63 + // called when the label changes
1.64 + virtual void onLabelChange();
1.65 +
1.66 + // overrides
1.67 + virtual void onInflate(const SkDOM& dom, const SkDOM::Node*);
1.68 +
1.69 +private:
1.70 + SkString fLabel;
1.71 + typedef SkWidget INHERITED;
1.72 +};
1.73 +
1.74 +////////////////////////////////////////////////////////////////////////////////
1.75 +
1.76 +class SkButtonWidget : public SkHasLabelWidget {
1.77 +public:
1.78 + SkButtonWidget(uint32_t flags = 0) : SkHasLabelWidget(flags), fState(kOff_State) {}
1.79 +
1.80 + enum State {
1.81 + kOff_State, //!< XML: buttonState="off"
1.82 + kOn_State, //!< XML: buttonState="on"
1.83 + kUnknown_State //!< XML: buttonState="unknown"
1.84 + };
1.85 + State getButtonState() const { return fState; }
1.86 + void setButtonState(State);
1.87 +
1.88 +protected:
1.89 + /** called when the label changes. default behavior is to inval the widget */
1.90 + virtual void onButtonStateChange();
1.91 +
1.92 + // overrides
1.93 + virtual void onInflate(const SkDOM& dom, const SkDOM::Node*);
1.94 +
1.95 +private:
1.96 + State fState;
1.97 + typedef SkHasLabelWidget INHERITED;
1.98 +};
1.99 +
1.100 +////////////////////////////////////////////////////////////////////////////////
1.101 +
1.102 +class SkPushButtonWidget : public SkButtonWidget {
1.103 +public:
1.104 + SkPushButtonWidget(uint32_t flags = 0) : SkButtonWidget(flags) {}
1.105 +
1.106 +protected:
1.107 + virtual bool onEvent(const SkEvent&);
1.108 + virtual void onDraw(SkCanvas*);
1.109 + virtual Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) SK_OVERRIDE;
1.110 + virtual bool onClick(Click* click);
1.111 +
1.112 +private:
1.113 + typedef SkButtonWidget INHERITED;
1.114 +};
1.115 +
1.116 +////////////////////////////////////////////////////////////////////////////////
1.117 +
1.118 +class SkCheckBoxWidget : public SkButtonWidget {
1.119 +public:
1.120 + SkCheckBoxWidget(uint32_t flags = 0);
1.121 +
1.122 +protected:
1.123 + virtual bool onEvent(const SkEvent&);
1.124 + virtual void onDraw(SkCanvas*);
1.125 + virtual void onInflate(const SkDOM& dom, const SkDOM::Node*);
1.126 +
1.127 +private:
1.128 + typedef SkButtonWidget INHERITED;
1.129 +};
1.130 +
1.131 +////////////////////////////////////////////////////////////////////////////////
1.132 +
1.133 +class SkStaticTextView : public SkView {
1.134 +public:
1.135 + SkStaticTextView(uint32_t flags = 0);
1.136 + virtual ~SkStaticTextView();
1.137 +
1.138 + enum Mode {
1.139 + kFixedSize_Mode,
1.140 + kAutoWidth_Mode,
1.141 + kAutoHeight_Mode,
1.142 +
1.143 + kModeCount
1.144 + };
1.145 + Mode getMode() const { return (Mode)fMode; }
1.146 + void setMode(Mode);
1.147 +
1.148 + SkTextBox::SpacingAlign getSpacingAlign() const { return (SkTextBox::SpacingAlign)fSpacingAlign; }
1.149 + void setSpacingAlign(SkTextBox::SpacingAlign);
1.150 +
1.151 + void getMargin(SkPoint* margin) const;
1.152 + void setMargin(SkScalar dx, SkScalar dy);
1.153 +
1.154 + size_t getText(SkString* text = NULL) const;
1.155 + size_t getText(char text[] = NULL) const;
1.156 + void setText(const SkString&);
1.157 + void setText(const char text[]);
1.158 + void setText(const char text[], size_t len);
1.159 +
1.160 + void getPaint(SkPaint*) const;
1.161 + void setPaint(const SkPaint&);
1.162 +
1.163 +protected:
1.164 + // overrides
1.165 + virtual void onDraw(SkCanvas*);
1.166 + virtual void onInflate(const SkDOM& dom, const SkDOM::Node*);
1.167 +
1.168 +private:
1.169 + SkPoint fMargin;
1.170 + SkString fText;
1.171 + SkPaint fPaint;
1.172 + uint8_t fMode;
1.173 + uint8_t fSpacingAlign;
1.174 +
1.175 + void computeSize();
1.176 +
1.177 + typedef SkView INHERITED;
1.178 +};
1.179 +
1.180 +////////////////////////////////////////////////////////////////////////////////
1.181 +
1.182 +class SkBitmapView : public SkView {
1.183 +public:
1.184 + SkBitmapView(uint32_t flags = 0);
1.185 + virtual ~SkBitmapView();
1.186 +
1.187 + bool getBitmap(SkBitmap*) const;
1.188 + void setBitmap(const SkBitmap*, bool viewOwnsPixels);
1.189 + bool loadBitmapFromFile(const char path[]);
1.190 +
1.191 +protected:
1.192 + virtual void onDraw(SkCanvas*);
1.193 + virtual void onInflate(const SkDOM&, const SkDOM::Node*);
1.194 +
1.195 +private:
1.196 + SkBitmap fBitmap;
1.197 + typedef SkView INHERITED;
1.198 +};
1.199 +
1.200 +////////////////////////////////////////////////////////////////////////////////
1.201 +
1.202 +class SkHasLabelView : public SkView {
1.203 +public:
1.204 + void getLabel(SkString*) const;
1.205 + void setLabel(const SkString&);
1.206 + void setLabel(const char label[]);
1.207 +
1.208 +protected:
1.209 + SkString fLabel;
1.210 +
1.211 + // called when the label changes
1.212 + virtual void onLabelChange();
1.213 +
1.214 + // overrides
1.215 + virtual void onInflate(const SkDOM& dom, const SkDOM::Node*);
1.216 +};
1.217 +
1.218 +////////////////////////////////////////////////////////////////////////////////
1.219 +
1.220 +class SkPushButtonView : public SkHasLabelView {
1.221 +public:
1.222 + SkPushButtonView(uint32_t flags = 0);
1.223 +
1.224 +protected:
1.225 + virtual void onDraw(SkCanvas*);
1.226 + virtual void onInflate(const SkDOM& dom, const SkDOM::Node*);
1.227 +};
1.228 +
1.229 +////////////////////////////////////////////////////////////////////////////////
1.230 +
1.231 +class SkCheckBoxView : public SkHasLabelView {
1.232 +public:
1.233 + SkCheckBoxView(uint32_t flags = 0);
1.234 +
1.235 + enum State {
1.236 + kOff_State,
1.237 + kOn_State,
1.238 + kMaybe_State
1.239 + };
1.240 + State getState() const { return fState; }
1.241 + void setState(State);
1.242 +
1.243 +protected:
1.244 + virtual void onDraw(SkCanvas*);
1.245 + virtual void onInflate(const SkDOM& dom, const SkDOM::Node*);
1.246 +
1.247 +private:
1.248 + State fState;
1.249 +};
1.250 +
1.251 +////////////////////////////////////////////////////////////////////////////////
1.252 +
1.253 +class SkProgressView : public SkView {
1.254 +public:
1.255 + SkProgressView(uint32_t flags = 0);
1.256 + virtual ~SkProgressView();
1.257 +
1.258 + uint16_t getValue() const { return fValue; }
1.259 + uint16_t getMax() const { return fMax; }
1.260 +
1.261 + void setMax(U16CPU max);
1.262 + void setValue(U16CPU value);
1.263 +
1.264 +protected:
1.265 + virtual void onDraw(SkCanvas*);
1.266 + virtual void onInflate(const SkDOM& dom, const SkDOM::Node* node);
1.267 +
1.268 +private:
1.269 + uint16_t fValue, fMax;
1.270 + SkShader* fOnShader, *fOffShader;
1.271 + SkInterpolator* fInterp;
1.272 + bool fDoInterp;
1.273 +
1.274 + typedef SkView INHERITED;
1.275 +};
1.276 +
1.277 +////////////////////////////////////////////////////////////////////////////////
1.278 +
1.279 +class SkListSource : public SkEventSink {
1.280 +public:
1.281 + virtual int countRows() = 0;
1.282 + virtual void getRow(int index, SkString* left, SkString* right) = 0;
1.283 + virtual SkEvent* getEvent(int index);
1.284 +
1.285 + static SkListSource* CreateFromDir(const char path[], const char suffix[],
1.286 + const char targetPrefix[]);
1.287 + static SkListSource* CreateFromDOM(const SkDOM& dom, const SkDOM::Node* node);
1.288 +};
1.289 +
1.290 +////////////////////////////////////////////////////////////////////////////////
1.291 +
1.292 +class SkListView : public SkView {
1.293 +public:
1.294 + SkListView(uint32_t flags = 0);
1.295 + virtual ~SkListView();
1.296 +
1.297 + SkScalar getRowHeight() const { return fRowHeight; }
1.298 + void setRowHeight(SkScalar);
1.299 +
1.300 + /** Return the index of the selected row, or -1 if none
1.301 + */
1.302 + int getSelection() const { return fCurrIndex; }
1.303 + /** Set the index of the selected row, or -1 for none
1.304 + */
1.305 + void setSelection(int);
1.306 +
1.307 + void moveSelectionUp();
1.308 + void moveSelectionDown();
1.309 +
1.310 + enum Attr {
1.311 + kBG_Attr,
1.312 + kNormalText_Attr,
1.313 + kHiliteText_Attr,
1.314 + kHiliteCell_Attr,
1.315 + kAttrCount
1.316 + };
1.317 + SkPaint& paint(Attr);
1.318 +
1.319 + SkListSource* getListSource() const { return fSource; }
1.320 + SkListSource* setListSource(SkListSource*);
1.321 +
1.322 +#if 0
1.323 + enum Action {
1.324 + kSelectionChange_Action,
1.325 + kSelectionPicked_Action,
1.326 + kActionCount
1.327 + };
1.328 + /** If event is not null, it is retained by the view, and a copy
1.329 + of the event will be posted to its listeners when the specified
1.330 + action occurs. If event is null, then no event will be posted for
1.331 + the specified action.
1.332 + */
1.333 + void setActionEvent(Action, SkEvent* event);
1.334 +#endif
1.335 +
1.336 +protected:
1.337 + virtual void onDraw(SkCanvas*);
1.338 + virtual void onSizeChange();
1.339 + virtual bool onEvent(const SkEvent&);
1.340 + virtual void onInflate(const SkDOM& dom, const SkDOM::Node* node);
1.341 +
1.342 +private:
1.343 + SkPaint fPaint[kAttrCount];
1.344 + SkListSource* fSource;
1.345 + SkScalar fRowHeight;
1.346 + int fCurrIndex; // logical index
1.347 + int fScrollIndex; // logical index of top-most visible row
1.348 + int fVisibleRowCount;
1.349 + SkString* fStrCache;
1.350 +
1.351 + void dirtyStrCache();
1.352 + void ensureStrCache(int visibleCount);
1.353 +
1.354 + int logicalToVisualIndex(int index) const { return index - fScrollIndex; }
1.355 + void invalSelection();
1.356 + bool getRowRect(int index, SkRect*) const;
1.357 + void ensureSelectionIsVisible();
1.358 +
1.359 + typedef SkView INHERITED;
1.360 +};
1.361 +
1.362 +////////////////////////////////////////////////////////////////////////////////
1.363 +
1.364 +class SkGridView : public SkView {
1.365 +public:
1.366 + SkGridView(uint32_t flags = 0);
1.367 + virtual ~SkGridView();
1.368 +
1.369 + void getCellSize(SkPoint*) const;
1.370 + void setCellSize(SkScalar x, SkScalar y);
1.371 +
1.372 + /** Return the index of the selected item, or -1 if none
1.373 + */
1.374 + int getSelection() const { return fCurrIndex; }
1.375 + /** Set the index of the selected row, or -1 for none
1.376 + */
1.377 + void setSelection(int);
1.378 +
1.379 + void moveSelectionUp();
1.380 + void moveSelectionDown();
1.381 +
1.382 + enum Attr {
1.383 + kBG_Attr,
1.384 + kHiliteCell_Attr,
1.385 + kAttrCount
1.386 + };
1.387 + SkPaint& paint(Attr);
1.388 +
1.389 + SkListSource* getListSource() const { return fSource; }
1.390 + SkListSource* setListSource(SkListSource*);
1.391 +
1.392 +protected:
1.393 + virtual void onDraw(SkCanvas*);
1.394 + virtual void onSizeChange();
1.395 + virtual bool onEvent(const SkEvent&);
1.396 + virtual void onInflate(const SkDOM& dom, const SkDOM::Node* node);
1.397 +
1.398 +private:
1.399 + SkView* fScrollBar;
1.400 + SkPaint fPaint[kAttrCount];
1.401 + SkListSource* fSource;
1.402 + int fCurrIndex; // logical index
1.403 +
1.404 + SkPoint fCellSize;
1.405 + SkIPoint fVisibleCount;
1.406 +
1.407 + int logicalToVisualIndex(int index) const { return index; }
1.408 + void invalSelection();
1.409 + bool getCellRect(int index, SkRect*) const;
1.410 + void ensureSelectionIsVisible();
1.411 +
1.412 + typedef SkView INHERITED;
1.413 +};
1.414 +
1.415 +#endif
