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10 10  (% _mstvisible="1" %)
11 11  (% _msthash="315238" _msttexthash="18964465" _mstvisible="3" %)**Table of Contents:**
12 12  
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102 102  * Smart Cities
103 103  * Smart Factory
104 104  
105 -= 2.  Getting Started with Hello World =
104 += 2.  Getting Started with 'Hello World' =
106 106  
107 107  == 2.1  About this demo ==
108 108  
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140 140  === 2.2.2 Install SquareLine Studio ===
141 141  
142 142  
143 -Download and install the latest version of [[SquareLine Studio>>https://squareline.io/downloads#lastRelease]] on your computer. It supports Windows, Linux, and Mac OS. The software version we are using here is 1.4.2.
142 +Download and install the latest version of [[SquareLine Studio>>https://squareline.io/downloads#lastRelease]] on your computer. It supports Windows, Linux, and Mac OS. The software version we are using here is 1.5.0. See the image below.
144 144  
145 -[[image:squareline.io_downloads.png]]
144 +[[image:squareline.io_downloads.png||height="888" width="1294"]]
146 146  
147 147  
148 148  After installation, you can use SquareLine Studio with a **PERSONAL license plan**. Click **LOG IN** and create a free account using your email address. Then activate your PERSONAL license plan for free. You don’t need to provide any credit card information. However, the PERSONAL license plan has the following limitations:
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153 153  * Max. 2 themes
154 154  * Max. 1 component
155 155  
156 -
157 157  == 2.3 Simple usage of SquareLine Studio and exporting UI code ==
158 158  
159 159  
160 -After launching and logging into the software, create a new project as shown in Image 2.
158 +Start the SquareLine Studio. The **launcher screen** appears as shown in the below image. You can create a new project by clicking **Create** in the top menu. Then select the **Desktop** tab. Select the development platform, **Eclipse with  SDL for development on PC**.
161 161  
162 -* Select the major **LVGL** version as **8.3**.
163 -* Select the **Desktop** tab.
164 -* Select  **Eclipse with  SDL for  development on PC**:
165 -* In the **PROJECT SETTINGS**, select **LVGL version** **8.3.11**
166 -* Select the **CREATE **button.
160 +* In the **PROJECT SETTINGS**, select **LVGL version **as **8.3.11** and **Resolution** as **800** x **480**.
161 +* Select the **CREATE **button to create the new project with the selected settings.
167 167  
163 +[[image:squareline-studio-launcher-screen.png||height="752" width="1415"]]
168 168  
169 -[[image:image-20240928103357-2.png||height="680" width="708"]]
170 170  
171 - Image 2: Creating a new SquareLine project
166 +Next, you need to configure some additional settings for this project. To do so, select** File  -> Project Settings** as shown in the image below.
172 172  
173 -
174 -Next, you need to configure some settings for this project. By clicking in the specified order shown in Image 3, you will be directed to the page displayed in Image 4.
175 -
176 -* Select File  -> Project Settings
177 -
178 178  [[image:1727229582471-566.png]]
179 179  
180 - Image 3 accessing project settings
181 181  
171 +In the **PROJECT SETTINGS** dialog box, configure/modify the project settings as shown in the image below.
182 182  
183 -In the PROJECT SETTINGS dialog box, configure/modify the project settings:
184 -
185 185  * **UI Files Export Root**: Select a folder on your computer to store the UI files.
186 186  * **LVGL Include Path**: Set this to **lvgl.h**
187 -* **Click on the APPLY CHANGES button.**
175 +* Click on the **APPLY CHANGES** button.
188 188  
189 189  [[image:image-20240928105309-4.png||height="526" width="556"]]
190 190  
191 - Image 4 Configure/modify project settings
192 192  
180 +Now you can start building the user interface. Follow the steps below:
193 193  
194 -Now you can start building the UI. Follow the steps below:
195 195  
183 +=== **Add widgets** ===
196 196  
197 -**~1. add widget**
198 198  
199 -To add a widget, you should click a widget you want to add at the area entitled “Widgets”. In image , demonstrate a add process of label, button, and image 5.
186 +To add a widget, navigate to the **Widgets** panel, and then click on the widget you want to add to the screen. You can reposition the widgets in the screen area by clicking and dragging them. Now add a **Label**, **Button**, and **Image** as shown in the image below. The added widgets are also displayed in the **Hierarchy **panel.
200 200  
201 201  [[image:image-20240928111412-6.png||height="526" width="864"]]
202 202  
203 - image 5 add widgets
204 204  
205 -**2. modify widget**
191 +Then click the **Screen **widget to add the second screen. After adding the second screen, it will appear in the Screens panel as **Screen2**.
206 206  
207 -The area for modifying widgets is called "Inspector". There are four parts in the "Inspector" tab. We use three of them more frequently, excluding "COMPONENT". The second part is aimed at adjusting the layout, size, position, alignment, flags, and states, etc. of widgets. The name of the second part indicates the type of widget it is representing, and in image 6, it is "BUTTON".
193 +[[image:Screenshot 2024-12-24 140459.png||height="278" width="290"]]
208 208  
195 +=== **Modify widget properties** ===
196 +
197 +
198 +The area for modifying widgets is called the **Inspector** panel. The Inspector panel consists of four sections: **COMPONENT**, **<WIDGET>**, **STYLE SETTINGS**, and **EVENTS**, as shown in the image below. The second section allows you to adjust a widget's layout, size, position, alignment, flags, states, and more. When you select a widget on the screen, the name of this section changes to match the name of the selected widget.
199 +
209 209  [[image:1727485118799-984.png]]
210 210  
211 - image 6 the button widget's "Inspector" tab
212 212  
213 -Second part: "Layout" means a auto position-management for widgets contained in the parent widget. "Transform" includes size, position and align modification.
203 +==== **Changing the Button properties** ====
214 214  
205 +
206 +Click the **Button **you have added to the screen. Under the **Layout** you can change the button's position and size. Use the following settings:
207 +
208 +* **Flex Flow**: No Layout
209 +* **Transform**:
210 +** **X**: 331 px
211 +** **Y**: 203 px
212 +** **Width**: 100 px
213 +** **Height**: 50 px
214 +** **Align**: CENTER
215 +
215 215  [[image:1727485251053-655.png]]
216 216  
217 -image 7 the button widget's "BUTTON" tab
218 218  
219 -Third part: It is an area of style setting.
219 +Next, add a click event to the button. When the button is clicked, an event should trigger to change the current screen (Screen1) to a new screen (Screen2) with a fade effect and the transition from Screen1 to Screen2 should take 500ms.
220 220  
221 -Fourth part: It is an area for adding events. In image 8, it is adding a click event to a button. If the button is clicked after the click event is added as shown in image 8, the current screen will fade into another specified screen, and the switching process will last 500ms.
221 +* Click **ADD EVENT** button. A new section will appear to configure this event.
222 222  
223 +[[image:Screenshot 2024-12-24 134937.png||height="80" width="290"]]
224 +
225 +* Select **CLICKED** from the dropdown under **Trigger**. Choose **CHANGE SCREEN** under **Action**, then click the **ADD** button. A new section will appear to configure the action.
226 +
227 +[[image:Screenshot 2024-12-24 134818.png||height="222" width="290"]]
228 +
229 +* Select **Screen2** under **Screen to**. Select **FADE ON** from **Fade mode**. The default value **500** means the transition takes 500 milliseconds to appear the Screen2.
230 +* Finally, click the **ADD** button.
231 +
223 223  [[image:1727485480434-713.png||height="395" width="290"]]
224 224  
225 - image 8 add event for button
234 + Image 8: Add an event for the button
226 226  
227 -**3. change label widget content**
228 228  
229 -Modify the content in text as shown in image 9, the text content of label widget will be changed accordingly.
237 +==== **Changing the label properties** ====
230 230  
239 +
240 +Click the Label you have added to the screen. Under the **Label** section, type "**Click for Detail**" in the **Text** textbox.
241 +
231 231  [[image:image-20240928090825-1.png||height="327" width="391"]]
232 232  
233 - image 9 modify text content of label widget
234 234  
235 -**4. Add image into project**
245 +Once you enter the text, it will immediately appear on the label.
236 236  
237 -To use the image widget, you should first add an image to your project. The image format must be PNG, and its resolution should not exceed 800x480 pixels. There are two ways to add an image file. One way is to move your image into the folder "…/squareline project/assets/", as shown in image 10. The other way is to click the "ADD FILE INTO ASSETS" button, then select an image from your computer to import. After adding, you can see the image in the "assets" area in SquareLine Studio, as demonstrated in image 11.
238 238  
248 +==== **Changing image properties** ====
249 +
250 +
251 +To use the **Image **widget, you should first add an image to your project. The image format must be PNG, and its resolution should not exceed 800x480 pixels. There are two ways to add an image file.
252 +
253 +One way is to move your image into the folder "…/squareline project/assets/", as shown in the image below.
254 +
239 239  [[image:image-20240928113424-9.png||height="355" width="505"]]
240 240  
241 - image 10 add image file into SquareLine Studio project
242 242  
258 +The other way is to click the "**ADD FILE INTO ASSETS**" button, then select an image from your computer to import. After adding, you can see the image in the "**assets**" panel in SquareLine Studio, as shown in the image below.
259 +
243 243  [[image:image-20240928114139-10.png||height="559" width="810"]]
244 244  
245 - image 11 use image widget in SquareLine Studio
246 246  
247 -**5. The relationship between widgets**
263 +==== **The relationship between widgets** ====
248 248  
249 -There are two common relationships between widgets: one is parallel, the other is parent-child. The parallel relationship means that widgets' relative position is based on a collective object of reference. In parent-child relationship, the parts of the child object that are outside the boundaries of the parent object are not visible by default. Therefore, we need to adjust the position of the child object so that it falls within the range of the parent object, allowing it to be seen as illustrated in image 13.
250 250  
266 +Widgets commonly have two types of relationships: **parallel** and **parent-child**.
267 +
268 +* In a **parallel relationship**, widgets' positions are determined relative to a shared reference object.
269 +* In a **parent-child relationship**, any part of the child object outside the parent's boundaries is hidden by default. To make the child object fully visible, you must adjust its position to fit within the parent's range.
270 +
251 251  [[image:1727486567182-334.png||height="318" width="278"]]
252 252  
253 -image 12 move label1 to make label1 widget be a child of button1 widget(1)
254 254  
274 +Move the label, **Label1** to make it a child of **Button1** as shown in the image below.
275 +
255 255  [[image:image-20240928112001-8.png||height="431" width="796"]]
256 256  
257 - image 13 move label1 to make label1 widget be a child of button1 widget(2)
258 258  
259 -**6. Preview the final effect**
279 +Then set the **X** and **Y** position of the label to **0** as shown in the image below. The label will appear on the button. If you move the button on the screen, the label will move along with it as part of the button.
260 260  
261 -An advantage of this kind of software is that you can edit the UI with quick previews. In other words, it provides a way of combining graphical programming with simulation immediately.
281 +[[image:Screenshot 2024-12-24 144005.png||height="360" width="290"]]
262 262  
283 +
284 +==== **Preview the screen** ====
285 +
286 +
287 +You can test the result by clicking on the **PLAY** button as shown in the image below. The screen will change into play mode.
288 +
263 263  [[image:1727487368023-281.png]]
264 264  
265 - image 14 click on the triangle icon to start or end the simulation
266 266  
267 -For more detailed usage, please visit the official link: [[SquareLine Studio 1.4.2 Documentation ~| SquareLine Studio>>url:https://docs.squareline.io/docs/squareline/]].
292 +For more information, please visit the official link: [[SquareLine Studio 1.4.2 Documentation ~| SquareLine Studio>>url:https://docs.squareline.io/docs/squareline/]].
268 268  
269 269  
270 270  == 2.4 Integrate UI Code to ESP-IDF Project ==
271 271  
272 272  
273 -To achieve the integrating, we first need to export the UI code, then make some modifications, and finally relocate the UI code to a specific position within the project.
298 +To integrate, first export the UI code, then make some modifications, and finally relocate the UI code to a specific position within the project.
274 274  
275 275  [[image:1727229798126-306.png]]
276 276  
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290 290  
291 291   image 18 modify CMakeLists.txt
292 292  
318 +
293 293  The last step of integrating is adding two lines of code in main.c file.
294 294  
295 295  [[image:1727229926561-300.png]]
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328 328  
329 329  = 4. Example Project 2: LoRaWAN RS485 Alarm =
330 330  
331 -= 5.  The way to add a new panel to project =
357 += 5. The way to add a new panel to project =
332 332  
359 +
333 333  **~1. Design a panel in SquareLine Studio, using image 5.1 below as a reference.**
334 334  
335 335  [[image:image-20241121113445-1.png||height="584" width="934"]]
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336 336  
337 337   image 5.1 a panel about water_leak
338 338  
366 +
339 339  **2. Export the ui file.** You need  to adjust the export path first, then click "Export->Export UI Files". This step had been introduced before. Then you can get the ui files as shown in image 5.2.
340 340  
341 341  [[image:image-20241121141120-4.png||height="383" width="795"]]
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342 342  
343 343   image 5.2 ui files exported
344 344  
373 +
345 345  **3. Delete or rename some file.** Here are the steps:
346 346  
347 347   Step1 Delete the 'components' directory.
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476 476  
477 477   image 5.26 ui_water_leak_events_.c after modification
478 478  
508 +
479 479  **12. Modify ui_water_leak_style.c file.**
480 480  
481 481  Step1. '#include "../ui.h"'~-~->#include '"../ui_water_leak.h"'
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492 492  
493 493   image 5.28 ui_water_leak_style.c (1) after modification
494 494  
525 +
495 495  Step2. modify 'void ui_ScreenMain_screen_init(void)'~-~->'panel_with_type create_water_leak(uint8_t index)'
496 496  
497 497   delete code as shown in image 5.29
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500 500  
501 501   image 5.29 ui_water_leak_style.c (2)
502 502  
534 +
503 503  Step3. The image 5.30, 5.31 show the change.
504 504  
505 505  [[image:image-20241122152026-45.png||height="277" width="828"]]
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510 510  
511 511   image 5.31 ui_water_leak_style.c (3) after modification
512 512  
545 +
513 513  Step4. Copy partly the code in ui_water_leak.c, paste at extra_lib/sort.h(The process is shown in image 5.32, 5.33).
514 514  
515 515  [[image:image-20241122153958-47.png]]
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520 520  
521 521   image 5.33 ui_water_leak_style.c (4)
522 522  
556 +
523 523  Step5. Delete event function in code which was just pasted in extra_lib/sort.h(The process is shown in image 5.34).
524 524  
525 525  [[image:image-20241122155650-50.png||height="922" width="513"]]
... ... @@ -526,6 +526,7 @@
526 526  
527 527   image 5.34 ui_water_leak_style.c (5)
528 528  
563 +
529 529  Step6. Add some lines of code in extra_lib/sort.h as shown in image 5.35.
530 530  
531 531  [[image:image-20241122161934-51.png]]
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532 532  
533 533   image 5.35
534 534  
570 +
535 535  Step7. Add a line of code in extra_lib/sort.h as shown in image 5.36.
536 536  
537 537  [[image:image-20241122162852-53.png||height="330" width="529"]]
... ... @@ -538,6 +538,7 @@
538 538  
539 539   image 5.37
540 540  
577 +
541 541  Step8. Add some code in ui_water_leak_style.c as shown in image 5.38 from line534 to line 576 in detail.
542 542  
543 543  panel_with_type union_sensor;
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556 556  
557 557   image 5.38
558 558  
596 +
559 559  **13. Modify sort.c file.**
560 560  
561 561  Add a line of code ~-~-'#include "ui_water_leak.h"' as shown in image 5.39 line 16.
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