Lvgl scale thanks Description I am trying to implement round scale with needle-line (aka Speedometer) inside C++ class and function that run animation of moving needle to some value. LVGL Forum Lvgl chart scale is inside. xiongyu June 17, 2019, 8:02am 2. LV_PART_TICKS The tick lines a labels using the line and text style properties. obj – pointer to an object . v9. To rotate the image use lv_img_set_angle(img, angle). I think it’d be reasonable to add a dedicated algorithm which scale 8 bit fonts in 0. - lvgl/lvgl In the image above the VL/red, VR/blue and HB/green scales are at exactly the correct position. Uses the typical background properties. change the text of the major-tick labels about to be rendered -- div by 1000 so "5" = "5000 RPM", and; to change the color of the LittlevGL version: v7. The available colors for my display are 00(black), 01(dark gray), 10(light gray), 11(white). In the advanced format, You signed in with another tab or window. However when I want to know the size of the scale, it shows the width = 0 and the height = 0. 40 However, this only supports linear scale. Since LVGL only handles integer values on the meter scale, but the sensor’s value is a float, we use the same approach as in the examples Description Is it possible to change the font that a meter major scale tick? I’d like to make them a little smaller so they fit better when setting the size to 175x175. LVGL is the most popular free and open source embedded graphics library targeting any MCU, You can rotate or scale any widget drawn by LVGL. Value, range and orientation; Modes; Knob-only Parameters:. angle – rotation in degree with 0. However I now need to use this same GUI on a 7" display with a resolution of 1024x600. A round scale with multiple needles, resembling a clock; A round scale with multiple needles, resembling a clock; A round scale with multiple needles, resembling a clock; A round scale with multiple needles, resembling a clock; Slider. FloatingDust August 13, 2024, 3:28am 1. Thermometer¶. They are useful for semantic purposes and have slightly different default settings. Get the LVGL Arduino library; Set up drivers; Configure LVGL; Initialize and run LVGL; Use the examples and demos; Debugging and logging Expected behavior. LVGL version v9. How LVGL can display debug information in case of trouble. draw Yes; transform Embedded graphics library to create beautiful UIs for any MCU, MPU and display type. I also want to know if there is a dynamic way to change the size of the picture. The Arc consists of a background and a foreground arc. lv_scale_section_t * lv_scale_add_section (lv_obj_t * obj) scale. The item in the middle is the selected item and normally stands out from the other items due to different styles applied to it. It it should work the best with some TTF libraries, like FreeType and TinyTTF. buf_size_in_bytes size of buffer(s) in bytes. 9% of it’s normal size. lv_scale_mode_t; @22; lv_scale_create() lv_scale_set_mode() lv_scale_set_total_tick_count() lv_scale_set_major_tick_every() lv_scale_set_label_show Hi there, I need to set the gap for the labels on a round lv_scale object. LV_PART_MAIN The background of the Meter. Therefore, I want to use it through LV_EVENT_DRAW_TASK_ADDED. - lvgl/lvgl A round scale with multiple needles, resembling a clock; Customizing scale major tick label color with LV_EVENT_DRAW_TASK_ADDED event; A round scale with labels rotated and translated; A horizontal scale with labels rotated and translated; API; Slider (lv_slider) Overview; Parts and Styles; Usage. Trying to use lv_meter and struggling to understand the API calls/variables. - lvgl/lvgl Scale Widgets show linear or circular scales with configurable ranges, tick counts, placement, labeling, and sub-sections (scale_sections) with custom styling. In other words, I need a Embedded graphics library to create beautiful UIs for any MCU, MPU and display type. When lv_meter went away in LVGL v9. selector – OR-ed value of parts and state to which the style should be added. LV_PART_TICK The tick lines a labels using the line and text style properties. Default 0; Inherited No; Layout Yes; Ext. That means that lv_micropython provides LVGL API for any LVGL version, and generally does not require code changes as LVGL evolves. ino example there is a my_print method, which sends this debug information to the serial interface. Memory Management Hello The lv_meter examples animates the indicator value automatically (with some anim functions). What have you tried so far? I’ve tried lv_obj_set_size/width. I was hoping zoom option might do the trick. Description What MCU I’m using LVGL 9. I can have success with the mode set to VERTCIAL MODE and can create multiple sections with different styles including line width, color, etc. But if I take the same code I suggest you to create a second window which will always work as “lens” and will track you mouse cursor on 1st window. Angle has 0. You will still need to calculate by how many % you want to scale it based on your display though. Go to lvgl and copy lv_conf_template. Even nested transformations are supported on the children. There are a number of built-in Paths that can Description I’m relatively new to EEZ Studio and lvgl but have a working development system and can built operational UI’s and very pleased to have found both products! I’m trying to get a working scale and line needle defined in EEZ Studio to operate as a simple meter. It's still not clear how to pass the frame_index, target_width and target_height but I'm sure we can figure it out. What have I missed? Why is the display driver called only once? Only the upper part of the display is refreshed. 2 What do you want to achieve? My screen size is 480x640, and I have an image with a size of 480x640 and a format of JPEG stored in FATFS. My problem is that the main tick labels now also show 100 - Description I have an image displayed on my screen and I would like to zoom in. LV_DISPLAY_RENDER_MODE_PARTIAL Use the buffer(s) to render to the display using buffers smaller than the size of the display. There should be a way to set the size of the image via its original width, and the scaling should not affect it. Description I have developed a GUI for a 7" touchscreen display with a resolution of 800x480. What can be the problem? My display driver is not called. In v8, the function for the major ticks had a Embedded graphics library to create beautiful UIs for any MCU, MPU and display type. Since line object don't keep a local copy of the points array, the points coordinates are shared with all We can have a flag in lv_image_dsc_t for vector, and if it's set, we need to open and cache the image with a different size, instead of scaling it. But I am confused about With lv_meter there is the ability to create multiple meters which is the idea of what is wanted except without the taper. pad_inner is used to set space between the scale lines and the scale labels. lv_obj_set_style_transform_scale_x() lv_obj_set_style_transform_scale_y() lv_obj_set_style_transform_rotation() lv_obj_set_style_transform_pivot_x() A round scale with multiple needles, resembling a clock; Customizing scale major tick label color with LV_EVENT_DRAW_TASK_ADDED event; A round scale with labels rotated and translated; A horizontal scale with labels rotated and translated; API; Slider (lv_slider) Overview; Parts and Styles; Usage. Replaces a style of an object, preserving the order of the style stack (local styles and Configure LVGL LVGL has its own configuration file called lv_conf. It draws a background using the typical background style properties and "minor" scale lines using the line and scale style properties. S> I never tried this solution ESP32 What LVGL version are you using? 8. The Gauge's main part is called LV_GAUGE_PART_MAIN. The touch gestures are Move object around the centre of the parent object (e. What have Now i want to scale a bmp image with littlevgl , do you have any suggest for me？Thanks. 2 on ESP32 (FreeRTOS/Arduino). Whenever a new value comes from the sensor, we update the needle indicator as well as the text in the label. What LVGL version are you using? Version 8 What do you want to achieve? A simple method of scaling up the GUI to fit the new screen. Get started. VG-Lite for SVG rendering. scale_end_border_width ( lv_style_int_t): Width of a border drawn on the outer side of the scale in the end region. kisvegabor September 25, 2019, 6:17am 2. Instead it uses “scale” widget. Another intriguing feature that LVGL could potentially incorporate is the automatic calculation of three optimal built-in fonts. When i am passing class object pointer to callback function, that invokes lv_scale_set_line_needle_value, my data corrupts and lv_scale_set_line_needle_value retruns obj_set_style_transform_pivot_x and obj_set_style_transform_pivot_y are only going to work with obj_set_style_transform_angle. You can find the required instructions are on the converter’s site. 2 inch e-ink). Similar to Scale Example 2 in the widget examples. 281 for 10% enlargement. Use of buffers at least 1/10 display size is recommended. In v8, the function for the major ticks had a parameter label_gap: lv_meter_set_scale_ Barcode . obj – pointer to an image object . STM32F407、keil5. The concept in nutshell is the following: A style is an lv_style_t variable which can hold properties, for example border width, text color and so on. The chart has some similar logic. What happened? lv_scale_set_line_needle_value() works only if there is only 1 scale object. 5 2 Fonts have a format property. You signed out in another tab or window. It has 2 categories: Legacy simple format and Advanced format. In the most simple case, the font is stored in a simple array of bitmaps. And the image is displayed normally. 0~100. Use lv_barcode_create() to create a barcode object, and use lv_barcode_update() to generate a barcode. 1 Like. 0 in favor of lv_scale, some important drawing events went away, and in previous firmware projects, I made heavy use of those events in a Description I have tried to create a scale widget on LVGL9 by lv_example_scale_1() as the following code. I’ve tried to apply them on glyphs but it gave quite bad quality for letters. Usage . Styles can be assigned to Widgets to change their appearance. Value, range and orientation; Modes; Knob-only LVGL Basics LVGL (Light and Versatile Graphics Library) is a free and open-source graphics library providing everything you need to create an embedded GUI with easy-to-use graphical elements, beautiful visual effects, and a low memory footprint. A Path is a function which calculates the next value to set based on the current state of the Animation. Enable LV_USE_BARCODE in lv_conf. How does it do this? Overview of LVGL's Data Flow Overview of LVGL Data Flow You signed in with another tab or window. Scale Widgets show linear or circular scales with configurable ranges, tick counts, placement, labeling, and sub-sections (Sections) with custom styling. Now, I’m planning to use LVGL v9. 2 with Arduino Giga Shield. Roller allows the end user to select an item from a list by scrolling it. 0 in favor of lv_scale, some important drawing events went away, and in previous firmware projects, I made heavy use of those events in a tachometer (rev counter in British), for example to:. Embedded graphics library to create beautiful UIs for any MCU, MPU and display type. Goal is simple bar with different colors for different sections of the bar. In this case ThorVG needs to While porting an application from windows to linux, I came across scaling of images, using stretchBlt function, in various factors. You can control the Path (curve) of an Animation. Important Notes This section describes special cases in which LVGL's behavior might be Roller (lv_roller) Overview . 0. See blue line in the I have tried to create a scale widget on LVGL9 by lv_example_scale_1() as the following code. Implementing the spinboxes wasn’t a problem, but styling them is kinda confusing me. What LVGL version are you using? 8. You switched accounts on another tab or window. The value 256 (or LV_SCALE_NONE) means normal size, 128 half size, 512 double size, and so on. 1 degree precision, LVGL doesn't start, randomly crashes or nothing is drawn on the display. 3. Parts and Styles¶. It describes how the glyph draw data is stored. See the documentation: Image (lv_image) — LVGL Parameters:. In the LVGL_Arduino. when using the normal needle style indicator needle the needle is the same width from start to stop but there is no way to set the start radius only the end radius and it always starts in the center. around the circumference of a scale) Default 0; Inherited No; Layout Yes; Ext. Sorry about the name but I was working in the existing names. And the calculation is only plastic, because the calculation is floating point, the larger the value, the greater the deviation. scale_end_line_width ( lv_style_int_t): Width of a scale lines in the end Is there any way to scale these up so they are 5x to 10x bigger? Thanks in advance Alex. - lvgl/lvgl The audio data input samples are converted to a logarithmic scale and the goal is to display these values on LCD in the form of a meter. This is like the linemeter except it is linear, not curved. With a bar and label it makes Problem to solve. Styles are used to set the appearance of Widgets. screen_meter_1, 0, count); does not work Thank you Embedded graphics library to create beautiful UIs for any MCU, MPU and display type. draw No; transform_scale_x Zoom Widget horizontally. The scale widget is divided in the following three parts: LV_PART_MAIN Main line. The output format of lvgl online conversion is RGB565. I’m using LV_STDLIB_CLIB because I saw a recommendation for this with ESP32, but it seems that it precludes use of lv_mem_monitor(). 0 to 20. LVGL demo project for ESP32; Using LVGL in your ESP-IDF project; Using lvgl_esp32_drivers in ESP-IDF project; Renesas. 1 degree resolution (0. #include “lvgl/lvgl. This works so far. h into the Arduino Libraries directory next to Scale down all opacity values of the object by this factor. Some guys said that changing the r_mod of struct lv_meter_scale_t could achieve this. 0, float or double type can meter support these data types or custom major tick labels to adjust the display requirement. h as lv_conf. Is there a way, can you use floating point . The program compiles, loads, and runs. But I would like to keep the same dimensions as before the zoom and cover the same part of the screen but with a zoomed in fragment of my image. The only difference is that instead of one source image, you set an array of multiple source images that supply "frames" in an animation. When LVGL is installed, follow these configuration steps: Go to the directory of the installed Arduino libraries. LV_PART_ITEMS Scale allows you to have a linear scale with ranges and sections with custom styling. It also uses the text properties to set the style of the scale labels. x, y can be set with value of LV_PCT, lv_image_get_pivot will return the true pixel coordinate of pivot in this case. . 39 What do you want to achieve? lvgl chart scale is inside What have you tried so far? Tick marks and labels. 4V becomes 124. 0 I want to scale the image, and the test found something wrong. So I made the following mod Inside the border LVGL keeps a "padding margin" when placing a Widget's children. The Arc's size and position will respect the padding style properties. LV_PART_MAIN Draws a background using the typical background style properties and an arc using the Arc style properties. embeddedt June scale_border_width ( lv_style_int_t): Width of a border drawn on the outer side of the scale in the normal region. Parts and Styles . h LVGL doesn't start, randomly crashes or nothing is drawn on the display. . width and height of the scale? Thank you. 0 which doesn’t have meter widget anymore. My project runs out of memory within a few minutes. This way, if auto-scaling is enabled, LVGL could dynamically adjust these fonts accordingly. For some reason I can’t find your reply here but I received an email version of your reply also. To enable this feature you have to edit the lv_conf. Styles in lvgl are heavily inspired by CSS. Hoping someone can explain: lv_meter_set_scale_range(meter, scale, min, max, angle_range, rotation) what is the rotation; what does it relate to (i. 2. See blue line in the Scale allows you to have a linear scale with ranges and sections with custom styling. The simplest case is linear, meaning the current value between start and end is changed at the same rate (i. E. A thermometer with a precise gauge also made from a meter widget and a numeric display using label:. What LVGL version are you using? 9. What have you tried so far? I have changed Hi everyone, I am new at lvgl. Lvgl now has functions to transform (scale and/or rotate) images. buf2 a second optional buffer (see below). reference point)? lv_meter_set_scale_major_ticks(meter, scale, nth_major, tick_width, tick_length, tick_color, You also need to use LVGL's file system module and register a driver with some functions for the basic file operation. How to receive the Hi there, I need to set the gap for the labels on a round lv_scale object. g. The outline is drawn outside the bounding box. The animation image is similar to the normal 'Image' Widget. MX RT1176 What LVGL version are you using? 8. 1 What do you want to achieve? I’d like to draw a custom pointer (needle) to my lv_indicator (linear). I agree, doing: uint32_t total_tick_num = chart->point_cnt - 1; works better than my solution as you Looks like the translator is not very accurate , I mean, I need to draw a watch dial for smart watches, similar to figure 1, but there is no corresponding widget can achieve directly, so I refer to guage. The most simple way is to use the Online converter. 2 What I have achieved so far? screen configured, objects created including containers, chart, scales, buttons Positioning & drawing the left & right vertical scales, in correct position and updating Positioning & drawing the bottom horizontal scale, in correct position and Parts and Styles¶. Only a value of 256 works, leaving the image unscaled. 3600: clock wise) . Since lv_meter_set_indicator_end_value does not accept decimal values, my idea is to set the range to 100 - 150, so a voltage of 12. Simple Slider; Slider with custom style; Slider with extended drawer; Slider with opposite direction; Span ESP32-S#-LCD-EV-BOARD2 (800x480) What LVGL version are you using? v9. c and modify, effect is probably as shown in figure 2, if there is a watch dial widget (like guage widget) can call a function directly, will be very convenient. lv_scale. What MCU/Processor/Board and compiler are you using? BLE MCU(ARM) What do you experience? After many tests, I found Embedded graphics library to create beautiful UIs for any MCU, MPU and display type. scale_end_line_width (lv_style_int_t): Width of a scale lines in the end region. - lvgl/lvgl cc @C47D @liamHowatt @kisvegabor Introduce the problem Currently, lv_scale_set_text_src is not very flexible, it can only use a fixed string array. Buttons have no new features compared to the Base Widget. I have wrote a set_px_cb function to update the buffer according to my display (waveshare 4. As soon as you update a line, it changes all lines of all scale object. 1 What do you want to achieve? Make the font smaller for the major tick numbers What have as above, my data range from 0. In C it seems to be possible to just call lv_textarea_set_cursor_hidden, but in micropython only the buf1 a buffer to which LVGL can render pixels. even LED matrices. I’ve read through the docs and I can’t see how to do it. 2 What do you want to achieve? Chart widget: Displaying temperature values with 1 decimal place on the y axis for example 20. This is too small for LVGL to display hence the reason why the button ends up not being able to be seen. I want to display it in an lv_img component of size 240x320. Fractional scale works as well. LV_PART_INDICATOR The needle line or image using the line and img style properties, as well as the background properties to draw a square (or circle) on the pivot of the needles. with fixed steps) over the duration of the Animation. LVGL C API Coding Conventions For a summary of coding conventions to follow see the Coding style. bool lv_obj_replace_style (lv_obj_t * obj, const lv_style_t * old_style, const lv_style_t * new_style, lv_style_selector_t selector) . Value 0, LV_OPA_0 or LV_OPA_TRANSP means fully transparent, 256, LV_OPA_100 or LV_OPA_COVER means fully covering, other values or LV_OPA_10, LV_OPA_20, etc indicate semi-transparency. Creating new project with LVGL; HW acceleration for Renesas RA6M3 platforms; Arduino. Uses code128 by fhunleth. LV_PART_INDICATOR Draws another Animation Image (lv_animimg) Overview . 9 What have you tried so far? tried to multiply by 10 and add values, but how to scale the values Code to reproduce Screenshot and/or video Parts and Styles¶. I am a litte bit confused about drive my 4 gray scale display(2 bits for each color). Button (lv_button) Overview . A more complex question is whether we shall use e. Default value: 0. Hi all Not sure if I am in teh right forum I want to create a voltmeter with a range of 10 - 15 volts. P. - lvgl/lvgl LVGL version. Hi Alex, I need to generate a new font. First of all I would like to easily hide the cursors and only show it upon interacting with the widget. The Scale Widget has the following three parts: LV_PART_MAIN Main line — the blue line in example image. xPosOnScale = lv_scale_get_tick_position(object, tickVal); or so Description How to change the label text size？ What do you want to achieve? The label text default size is 16x16 in my device. But resets every time the lv_scale_set_line_needle_value is run. Then for some period just take a snapshots from some area around cursor position of the 1st screen and “zoom” it using LVGL features - link. render_mode is one of the following:. What MCU/Processor/Board and compiler are you using? Simlator What LVGL version are you using? 8. - lvgl/lvgl Then use the lv_image_set_scale() function to set the image scaling parameters, the image scaling is normal. Coupled with a bar it serves as a labeled axis. Set the rotation center of the image. h file and enable logging in the section log settings: When building lv_micropython, the public LVGL C API is scanned and MicroPython API is auto-generated. I want to change the font size to 32x32. 3 version with c language. As shown in the following figure: Description What MCU/Processor/Board and compiler are you using? NXP I. In other words, if I set my image size to 20x20 and then zoom it, the "slice" of the image visible should be the Starting with a simple "lv_scale" based on the LVGL 9 example: Then putting an "lv_arc" [scaled LV_PCT(100) in both axis] as a child of "lv_scale": OK, looks like we need to find a way to size the "lv_scale" drawn meter down, so the "lv_arc" is outside the ticks (as per the reference screenshot from LVGL 8). I use lvgl 8. style – pointer to a style to add . I’ve also set #define LV_USE_OS LV_OS_FREERTOS My code reports lots of free heap space when the errors start: Free Arc (lv_arc) Overview . x Description I want to set the distance between meter scale and the border of the meter. The root cause is that the line points are defined as static lv_point_precise_t needle_line_points[2];. Reload to refresh your session. h. Call lv_barcode_set_scale() to adjust scaling, call lv_barcode_set_dark_color() and lv_barcode_set_light_color() adjust color, call Hello, You probably could have just used lv_image_set_scale_x and lv_image_set_scale_y depending on the size of your display. The image will be rotated around this point. Gray-scale displays. When using the add_arc function it allows you to Hi guys, I’m trying to design a config page featuring multiple spinboxes. What MCU/Processor/Board and compiler are you using? MCU = Parts and Styles¶. The foreground (indicator) can be touch-adjusted. What I am trying to do is shrink the area of the chart, as indicated by the white Embedded graphics library to create beautiful UIs for any MCU, MPU and display type. e. Hello everyone, I want to ask why we can’t add straight line scale, for example, let us choose the circle, or the straight line scale, because now we really want the straight line scale, but only through painting. - lvgl/lvgl LVGL (Light and Versatile Graphics Library) is a free and open-source graphics library providing everything you need to create an embedded GUI with easy-to-use graphical elements, beautiful visual effects and a low memory footprint. There is no phenomenon that the image disappears when the scaling parameters are modified. Style Details . It's similar to a class in CSS. Hi @pete-pjb,. Barcode generation with LVGL. How can I get the position - in this case the x-Position of a tick for a specific value ? e. I tried using “meter” widget in LVGL v8. The display should show one decimal place. Animation Path . Description What MCU/Processor/Board and compiler are you using? ESP32 on a WT32 SC01 board What LVGL version are you using? Version 9 What do you want to achieve? Scale widget that I can get the needle to move based on an int variable. The concept in a nutshell is that a style is an lv_style_t variable which can hold properties like border width, font, text color and so on. Might also be able to use lv_image_set_scale for fractional scaling. But how can I set the position/value of the indicator/needle manually? lv_meter_set_indicator_value(ui. But as mentioned above, Yes, you can scale the images in the latest version of LVGL but note that it's a quite performance hungry operation. by setting obj_set_style_transform_zoom to 10 you are making the button 3. Here is Embedded graphics library to create beautiful UIs for any MCU, MPU and display type. What MCU/Processor/Board and compiler are you using? I’m using Attempting to create a simple scale using ver 9. void lv_image_set_pivot (lv_obj_t * obj, int32_t x, int32_t y) . When I zoom in, the image scales up but it changes the dimensions of the image, so a bigger part of the screen is covered by the image. 0 What happened? When an image created from the online image converter (LVGL v9, RGB565) is scaled using lv_image_set_scale(), the rendered image is unrecognizable. xdiypbsfejktjolnsjmwmofktqxoocsfpcixykqurrgjvvlhlcvoc