CN113157166B - Method for realizing self-adaptive note taking by intelligent terminal, storage medium and electronic equipment - Google Patents
Method for realizing self-adaptive note taking by intelligent terminal, storage medium and electronic equipment Download PDFInfo
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- CN113157166B CN113157166B CN202110552301.5A CN202110552301A CN113157166B CN 113157166 B CN113157166 B CN 113157166B CN 202110552301 A CN202110552301 A CN 202110552301A CN 113157166 B CN113157166 B CN 113157166B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0481—Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/26—Visual data mining; Browsing structured data
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
Abstract
The invention discloses a method for realizing self-adaptive note taking by an intelligent terminal, which comprises the steps of obtaining an absolute position area of each character when the whole article is completely displayed, searching anchor point characters according to an offset position when a note taking picture is displayed, searching a corresponding note taking picture, and determining the display position of the note taking picture according to a relative offset. By using the method and the device, the synchronous following effect of the note pictures and the corresponding characters can be realized as usual even if the display area of the article is changed or the font size of the article is changed.
Description
Technical Field
The invention relates to the technical field of intelligent terminals, in particular to a method for realizing self-adaptive note taking of an intelligent terminal, a storage medium and electronic equipment.
Background
When an intelligent terminal (especially a mobile phone and a tablet) is used to watch an article through an application program, sometimes a note (drawing a line or writing characters and the like) is to be taken directly in the article in a manner similar to a paper book, that is, the note and the characters in the article are synchronized. When the sliding screen scrolls through the article, the notes also scroll along with the text. The Chinese patent application ZL201511016766X provides an implementation method for a note function followed by an article, but notes implemented by the method are only suitable for being displayed on a certain terminal according to the fixed font size, if the article is displayed on intelligent terminals with different resolutions or the font size of the article is changed on the same terminal, the article typesetting inevitably changes, and then the note and the article cannot be correspondingly matched.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method for realizing self-adaptive note taking by an intelligent terminal, a storage medium and electronic equipment.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for realizing self-adaptive note taking by an intelligent terminal comprises the following specific processes:
the overall note view is divided into a lower article view and an upper note view; the article view can be scrolled up and down and is defined as articlelView, and the size of the article view is defined as the size of the whole view after all articles are logically displayed; the area where the user can see the article content is defined as an article display area, the position of the article display area is always unchanged, when the up-down sliding screen scrolls, the article view actually scrolls up and down, and the article view can display the article content in the article display area in real time; the note view is defined as NoteView, the ArticleView can transfer the current rolling position to the NoteView in real time by calling a callback function of the NoteView in the process of rolling up and down, and the current rolling position of the ArticleView is defined as ArticleView.
When the content of an article is loaded, firstly traversing a character array of the whole article, calculating the total length after the whole article is logically and completely displayed according to the display area, the typesetting information, the display width and the height of each character and the width and the height of a picture, and setting the length as the length of the articleView; in the whole traversal process, the absolute position area Rect (top, bottom, left, right) of each character in the article in the articleView, namely the Rect value, is stored at the same time, and an array formed by the Rect values of all the characters is named as charsRectBuf; transmitting charsRectBuf to NoteView; the characters refer to characters and picture placeholders left after all labels in the character array of the article are removed, and the picture placeholder refers to a picture which is regarded as a special character; the absolute position area is a display area of each character in the ArticleView when the ArticleView logically and completely displays the whole article; in Rect (top, bottom, left, right), left and top represent the abscissa and ordinate of the upper left corner of the absolute position area, respectively, and right and bottom represent the abscissa and ordinate of the lower right corner of the absolute position area, respectively;
when a user takes notes, dragging a painting brush to draw lines, write words and the like on a NoteView, the NoteView shows the contents drawn by the user and simultaneously records the coordinate values of down, move and up touch messages corresponding to the painting brush each time, when the up message is received, the painting brush is shown to be lifted, a note is completed, at the moment, the coordinate values of the down, move and up of the painting brush which is recorded at the time are added with the aromatic View. When the user picks up the brush again to take a note, another note display area Rect value can be obtained;
when saving the notes, the NoteView looks up the anchor text and calculates the relative position offset: traversing charsRectBuf, determining anchor point characters corresponding to coordinates (Rect.left, Rect.top) of the upper left corner of each note display area and relative offsets (offset X, offset Y) of the coordinates of the upper left corner of the absolute position area of the anchor point characters, and recording;
clipping a note picture from the bitmap of the NoteView canvas according to all the note display areas and converting the note picture into png picture byte stream;
the note is stored in a database, and data items of all notes in the database comprise index values of anchor characters, png picture byte streams, offset X, offset Y and font size of the note; the index value of the anchor character refers to the offset position of the anchor character in charsRectBuf, and the font size refers to the font size adopted by the current display of the article;
when the ArticleView rolls up and down, the NoteView receives ArticleView.offset Y in real time, the NoteView combines the article display area and the ArticleView.offset Y, index values of all characters currently displayed in the article display area are obtained by traversing all charsRectBufs, related note data items are searched from a database according to the index values, and png picture byte streams of the notes are read and displayed;
the display position of the note png picture on NoteView is (charsrectBuf [ index ]. left + offset X, charsrectBuf [ index ]. top + offset Y f-ArchiveView. offset), wherein f is a font size change coefficient, namely the font size of the current article is divided by the font size stored in the database, and when f is not 1.0, the note png picture is zoomed according to the font size change coefficient and then displayed so as to achieve the purposes of coordinating with the font size and enabling the note png picture to be consistent with the font size; charsRectBuf [ index ]. left represents the abscissa value of the upper left-hand coordinate of the index-th character displayed in ArticleView in charsRectBuf, and charsRectBuf [ index ]. top: and a vertical coordinate value representing the upper left-hand coordinate of the index-th character displayed in ArticleView.
Further, before the note is saved, the NoteView completes two optimization processes: 1) merge small note display areas: traversing all note display areas, comparing every two note display areas to see whether overlap exists, judging whether to merge the two note display areas if the overlap exists, wherein the merging condition is that the area of the note display area obtained after merging is smaller than the sum of the areas of the two note display areas before merging, merging the display areas of the two notes to obtain a note area if the merging is judged to be needed, and discarding the original display areas of the two notes; 2) Splitting the large note display area: dividing the note display area with the area exceeding the set threshold into a plurality of note display areas according to the set threshold, and discarding the original large note display area.
Furthermore, each note png picture can obtain a note display area when being displayed, and due to the change of the article display area or the font size, if the note png picture exceeds a NoteView canvas on a new position, the original note png picture is divided into a plurality of note png pictures for display, the original note display area is divided into a plurality of new note display areas, and the original note display area is discarded; and then writing the new note display areas into a database for storage, and synchronously deleting the old note data items before the division.
Furthermore, when browsing the notes, when the user modifies the original notes, the modified notes are saved according to the process of saving the notes to the database because the note display area is arranged in front of the original notes; after the original note display area loaded from the database is covered, the new note data item needs to delete the corresponding original note data item in the database before being stored in the database.
A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the above-mentioned method.
An electronic device comprising a processor and a memory for storing a computer program; the processor is configured to implement the above method when executing the computer program.
The invention has the beneficial effects that: by using the method and the device, the synchronous following effect of the note pictures and the corresponding characters can be realized as usual even if the display area of the article is changed or the font size of the article is changed.
Detailed Description
The present invention will be further described below, and it should be noted that the present embodiment is based on the technical solution, and a detailed implementation manner and a specific operation process are provided, but the protection scope of the present invention is not limited to the present embodiment.
The embodiment provides a method for realizing self-adaptive note taking by an intelligent terminal, which specifically comprises the following processes:
the overall note view is divided into a lower article view and an upper note view; the article view can scroll up and down, defined as articlelview, and the size of the article view is defined as the size of the whole view after the article is logically displayed all at once (in implementation, the article view is not displayed all at once, but displays the content which can be seen in the article display area); the area where the user can see the article content is defined as an article display area, the position of the article display area is always unchanged, when the up-down sliding screen scrolls, the article view actually scrolls up and down, and the article view can display the article content in the article display area in real time; the note view is defined as NoteView, the current scrolling position of the ArticleView can be transmitted to the NoteView in real time by calling a callback function of the NoteView in the process of up-down scrolling, the current scrolling position of the ArticleView is defined as ArticleView. offset, namely the offset of an article display area relative to the ArticleView on the Y axis;
when loading a piece of article content, the articlelview first traverses the character array of the whole article, which is the original data of the article and includes various label information related to typesetting and the like. Calculating the total length of the whole article after logically completely displaying according to the article display area, the typesetting information, the display width and height of each character (the display width and height of the character are determined by the font size) and the width and height of the picture, and setting the length as the length of the articlelView; in the whole traversal process, the absolute position area Rect (top, bottom, left, right) of each character in the article in the articleView, namely the Rect value, is stored at the same time, and an array formed by the Rect values of all the characters is named as charsRectBuf; the charsRectBuf is passed to NoteView. The characters refer to characters and picture placeholders left after all labels in the character array of the article are removed, and the picture placeholder refers to that a picture is regarded as a special character and only plays a role in placeholder. The absolute position area refers to the display area of each text in ArticleView when the ArticleView logically displays the entire article in its entirety. In Rect (top, bottom, left, right), left and top represent the abscissa and ordinate of the upper left corner of the absolute position area, respectively, and right and bottom represent the abscissa and ordinate of the lower right corner of the absolute position area, respectively;
when a user takes notes, dragging a painting brush to draw lines, write words and the like on a NoteView, the NoteView shows the contents drawn by the user and records the coordinate values of down, move and up touch messages corresponding to the painting brush each time, when the up message is received, the painting brush is shown to be lifted, one note is completed (namely one note is formed from one down to one up), and then the coordinate values of the down, move and up of the painting brush which is recorded at the time are added with the ArticleView. When the user picks up the brush again for taking notes, another note display area Rect value is obtained.
Before the notes are saved, the NoteView completes two optimization processes: 1) merge small note display areas: traversing all note display areas, comparing every two note display areas to see whether overlap exists, judging whether to merge the two note display areas if the overlap exists, wherein the merging condition is that the area of the note display area obtained after merging is smaller than the sum of the areas of the two note display areas before merging, merging the display areas of the two notes to obtain a note area if the merging is judged to be needed, and discarding the original display areas of the two notes; similarly, the merged note display area is the minimum rectangle containing all coordinate values of down, move and up messages contained in the brush operation of the two notes; 2) dividing a large note display area; the speed of reading and writing a note picture in a database and loading a UI thread is affected by the fact that a note display area is too large, the note display area with the area exceeding a set threshold is divided into a plurality of note display areas according to the set threshold (the dividing method can be that the area of the large note display area is divided by the set threshold to determine the number of the division, and if the division cannot be completed, the number of the division is increased by 1.
After the NoteView completes the optimization process, searching anchor characters and calculating the offset of the relative position: traversing charsRectBuf, determining anchor characters corresponding to coordinates (rec.left, rec.top) of the upper left corner of each note display area and relative offset (offset x, offset y) of the coordinates of the upper left corner of the absolute position area of the anchor characters, and recording the relative offset, wherein the relative offset can be used for determining the position of note picture display when the article is displayed on equipment with different resolutions or when the font size of the article displayed on the same resolution equipment is adjusted in future.
And clipping a note picture from the bitmap of the NoteView canvas according to all the note display areas and converting the note picture into png picture byte stream.
Saving notes to a database: the data items of each note in the database comprise an index value of an anchor character, png picture byte stream of the note, offset x, offset y and font size. The index value of the anchor character refers to an offset position of the anchor character in charsRectBuf, and the font size refers to a font size adopted by the current display of the article.
When the ArticleView rolls up and down, the NoteView receives ArticleView.offset Y in real time, the NoteView combines the article display area and the ArticleView.offset Y, index values of all characters currently displayed in the article display area are obtained by traversing all charsRectBufs, related note data items are searched from a database according to the index values, and the png picture byte stream of the note is read and displayed.
It should be noted that, after the articlelview is completely displayed (logically displayed), the index of each text is fixed.
The display position of the note png picture on NoteView is (charsrectBuf [ index ]. left + offset X, charsrectBuf [ index ]. top + offset Y f-ArchiveView. offset), wherein f is a font size change coefficient, namely the font size of the current article is divided by the font size stored in the database, and when f is not 1.0, the note png picture is zoomed according to the font size change coefficient and then displayed so as to achieve the purposes of coordinating with the font size and enabling the note png picture to be consistent with the font size; charsRectBuf [ index ]. left represents the abscissa value of the upper left-hand coordinate of the index-th character displayed in ArticleView in charsRectBuf, and charsRectBuf [ index ]. top: and a vertical coordinate value representing the upper left-hand coordinate of the index-th character displayed in ArticleView. On the basis of the note picture, the coordinates of the upper left corner when the note picture is displayed are accurately determined by combining the offset and the character size as follows: (charsRectBuf [ index ]. left + offset x f, charsRectBuf [ index ]. top + offset Y f-ArticleView. offset Y), where the Y coordinate minus ArticleView. offset Y is because the note png picture is displayed within the current article display area, not in ArticleView.
Each note png picture gets a note display area (rec value from picture display position, picture size and articlelieview. Due to the change of the article display area or the font size, the display of the note png picture at a new position may exceed the NoteView canvas, at this time, the original note png picture is divided into a plurality of note png pictures to be displayed, the original note display area is divided into a plurality of new note display areas, and the original note display area is discarded; then writing the new note display areas into a database for storage, and synchronously deleting old note data items before segmentation;
when browsing notes, when a user modifies the original notes, the modified notes are stored according to the process of storing the notes into the database because the notes are displayed in the front of the original notes. However, it should be noted that after the original note display area loaded from the database is covered (merged or split), the new note data item is deleted from the database before being saved in the database.
When the saved notes are uploaded, saved and downloaded on line, synchronous following effects of note pictures and characters can be kept when the notes are displayed on equipment with different resolutions, and the difference of the resolutions only affects the article display area.
Various corresponding changes and modifications can be made by those skilled in the art based on the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.
Claims (6)
1. A method for realizing self-adaptive note taking by an intelligent terminal is characterized by comprising the following specific processes:
the overall note view is divided into a lower article view and an upper note view; the article view can be scrolled up and down and is defined as articlelView, and the size of the article view is defined as the size of the whole view after all articles are logically displayed; the area where the user can see the article content is defined as an article display area, the position of the article display area is always unchanged, when the up-down sliding screen scrolls, the article view actually scrolls up and down, and the article view can display the article content in the article display area in real time; the note view is defined as NoteView, the ArticleView can transfer the current rolling position to the NoteView in real time by calling a callback function of the NoteView in the process of rolling up and down, and the current rolling position of the ArticleView is defined as ArticleView.
When the content of an article is loaded, firstly traversing a character array of the whole article, calculating the total length after the whole article is logically and completely displayed according to the display area, the typesetting information, the display width and the height of each character and the width and the height of a picture, and setting the length as the length of the articleView; in the whole traversal process, the absolute position area Rect (top, bottom, left, right) of each character in the article in the articleView, namely the Rect value, is stored at the same time, and an array formed by the Rect values of all the characters is named as charsRectBuf; transmitting charsRectBuf to NoteView; the characters refer to characters and picture placeholders left after all labels in the character array of the article are removed, and the picture placeholder refers to a picture which is regarded as a special character; the absolute position area is a display area of each character in the ArticleView when the ArticleView logically and completely displays the whole article; in Rect (top, bottom, left, right), left and top represent the abscissa and ordinate of the upper left corner of the absolute position area, respectively, and right and bottom represent the abscissa and ordinate of the lower right corner of the absolute position area, respectively;
when a user takes notes, the NoteView displays the contents drawn by the user, records the coordinate values of down, move and up touch messages corresponding to a painting brush each time, when the up message is received, the painting brush is lifted to finish one note, and adds the coordinate values of the down, move and up of the painting brush which is recorded at the time to the ArcheletView. When the user picks up the brush again to take a note, another note display area Rect value can be obtained;
when saving the notes, the NoteView looks up the anchor text and calculates the relative position offset: traversing charsRectBuf, determining anchor point characters corresponding to coordinates (Rect.left, Rect.top) of the upper left corner of each note display area and relative offsets (offset X, offset Y) of the coordinates of the upper left corner of the absolute position area of the anchor point characters, and recording;
clipping a note picture from the bitmap of the NoteView canvas according to all the note display areas and converting the note picture into png picture byte stream;
the note is stored in a database, and data items of all notes in the database comprise index values of anchor characters, png picture byte streams, offset X, offset Y and font size of the note; the index value of the anchor character refers to the offset position of the anchor character in charsRectBuf, and the font size refers to the font size adopted by the current display of the article;
when the ArticleView rolls up and down, the NoteView receives ArticleView.offset Y in real time, the NoteView combines the article display area and the ArticleView.offset Y, index values of all characters currently displayed in the article display area are obtained by traversing all charsRectBufs, related note data items are searched from a database according to the index values, and png picture byte streams of the notes are read and displayed;
the display position of the note png picture on NoteView is (charsrectBuf [ index ]. left + offset X, charsrectBuf [ index ]. top + offset Y f-ArchiveView. offset), wherein f is a font size change coefficient, namely the font size of the current article is divided by the font size stored in the database, and when f is not 1.0, the note png picture is zoomed according to the font size change coefficient and then displayed so as to achieve the purposes of coordinating with the font size and enabling the note png picture to be consistent with the font size; charsRectBuf [ index ]. left represents the abscissa value of the upper left-hand coordinate of the index-th character displayed in ArticleView in charsRectBuf, and charsRectBuf [ index ]. top: and a vertical coordinate value representing the upper left-hand coordinate of the index-th character displayed in ArticleView.
2. The method of claim 1, wherein before saving the note, the NoteView performs a two-way optimization procedure: 1) merge small note display areas: traversing all note display areas, comparing every two note display areas to see whether overlap exists, judging whether to merge the two note display areas if the overlap exists, wherein the merging condition is that the area of the note display area obtained after merging is smaller than the sum of the areas of the two note display areas before merging, merging the display areas of the two notes to obtain a note area if the merging is judged to be needed, and discarding the original display areas of the two notes; 2) Splitting the large note display area: dividing the note display area with the area exceeding the set threshold into a plurality of note display areas according to the set threshold, and discarding the original large note display area.
3. The method of claim 1, wherein each of the png notes displayed in a display area results in a display area, and if the png notes displayed in a new location exceed the NoteView canvas due to the change in the article display area or font size, the png notes are divided into png notes for display, the original png notes displayed in the display area are divided into new display areas, and the original display areas are discarded; and then writing the new note display areas into a database for storage, and synchronously deleting the old note data items before the division.
4. The method of claim 1, wherein when browsing notes, when the user modifies the original note, the modified note is saved according to the process of saving the note to the database because the note display area is already in front; after the original note display area loaded from the database is covered, the new note data item needs to delete the corresponding original note data item in the database before being stored in the database.
5. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method of any one of claims 1 to 4.
6. An electronic device comprising a processor and a memory, the memory for storing a computer program; the processor is adapted to carry out the method of any one of claims 1 to 4 when executing the computer program.
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