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Home Page: https://immediate-mode-ui.github.io/Nuklear/doc/index.html
A single-header ANSI C immediate mode cross-platform GUI library
Home Page: https://immediate-mode-ui.github.io/Nuklear/doc/index.html
How can I get a horizontal scrollbar to appear for the text editor*?
It is a bit limiting to have to find the longest line, in order to be able to scroll across the full length...
*I am not sure if text editor is the correct name... Looking at the 'overview.c' code, the "text editor" seems to be generated by nk_edit_string
in the following lines:
nk_layout_row_static( ctx, 180, 278, 1 );
nk_edit_string(
ctx,
NK_EDIT_BOX,
box_buffer,
&box_len,
512,
nk_filter_default
);
The fonts should be gamma correct, but they aren't.
I tried adding it myself, but the data that was provided in nk_tt__rasterize_sorted_edges isn't in the correct space.
https://chilliant.blogspot.com/2012/08/srgb-approximations-for-hlsl.html
After applying the formulas, the font is too bold, which could be because the data given through that function was modified so gamma incorrect rendering looks good too.
So, I've encountered this problem specifically on the edit-box. It's in this code:
if (in && in->mouse.buttons[NK_BUTTON_LEFT].clicked && in->mouse.buttons[NK_BUTTON_LEFT].down) { edit->active = NK_INBOX(in->mouse.pos.x, in->mouse.pos.y, bounds.x, bounds.y, bounds.w, bounds.h); }
Left-mouse-button must be clicked and currently held down for an edit-box to be made active (show the caret).
However, if in a single event pump I push both the left-mouse-button down and left-mouse-button up, ctx->input->mouse.buttons[0].down is 0 and ctx->input->mouse.buttons[0].clicked is 2, and the edit-box is never made active.
Speaking specifically about Windows, is there some guarantee that each cycle of the event loop will only receive once mouse button event? The demos appear to work, but my code is a little more complicated, and yet I think it's only a matter of timing that the demos work, and if the events were delivered a little more batch-like, the demos would also fail.
What am I missing here?
Hi @Hejsil ,
Apparently, commit 14dd68e "Fix bug where width padding was applied twice" introduces a regression in the code. To visualise the bug introduced in this commit:
1 - build the demo glfw_opengl3 and run it;
2 - Go to overview -> Widgets -> Combo -> Fist
Note all the items text, Pistol, Fist, Shotgun are all squashed to the left, without any spacing and with the first capital letter disappearing halfway:
Ubuntu-Mate 18.04 - 64 bit.
I mean I need dynamic font stash to add font glyph dynamicly.
The demo seems baking all characters with font size info.Which I don't need.
Think I will use multiple font and different font size.
For some font I just need some of the character,lets's say
Chapter 1 with font size 96.
Other dialogues font with font 24.And so on.no need for all.
If you duplicate the same window but give it a different name; it should function independently of the other window. Instead, because labels are used in lookup, every value is changed simultaneously, this should at least take into account the parent of the item. It should also be possible to use multiple items in one window that are named the same.
I'm currently using nuklear and needed support for 9-slice textures for buttons, windows, etc. I have modified a local clone of nuklear to add the required features and am curious as to whether or not there is any interest in having these features pushed upstream. If so, I can make a PR.
Hello I'm wondering if it is possible to make the main window topmost and float on top of all other application windows?
The versions are very old, and in particular a number of bugs in TTF handling have been fixed in more recent versions.
There's a few broken links since moving to Immediate-Mode-UI. These include the build system which still tries to build the old repo.
Since nk_windows are created & found based on name, this means they can't be renamed, if I'm correct. Only if you know the old name and set the name hash and name through the window obtained from begin with PR #35.
Is there a function for renaming that I'm missing?
When windows are pixel-perfect aligned one next to the other, the hover status isn't updated properly.
Replace the window in the default demo with the following:
if (nk_begin(ctx, "Demo1", nk_rect(100, 100, 200, 200),
NK_WINDOW_MOVABLE|NK_WINDOW_CLOSABLE|NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
{
nk_layout_row_dynamic(ctx, 80, 1);
nk_button_label(ctx, "button");
}
nk_end(ctx);
if (nk_begin(ctx, "Demo2", nk_rect(300, 100, 200, 200),
NK_WINDOW_MOVABLE|NK_WINDOW_CLOSABLE|NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
{
nk_layout_row_dynamic(ctx, 80, 1);
nk_button_label(ctx, "button");
}
nk_end(ctx);
The left button doesn't react on hover.
When windows are spread apart by 1 or more pixels, hover works fine:
if (nk_begin(ctx, "Demo1", nk_rect(100, 100, 200, 200),
NK_WINDOW_MOVABLE|NK_WINDOW_TITLE))
{
nk_layout_row_dynamic(ctx, 80, 1);
nk_button_label(ctx, "button");
}
nk_end(ctx);
if (nk_begin(ctx, "Demo2", nk_rect(300 + 1, 100, 200, 200),
NK_WINDOW_MOVABLE|NK_WINDOW_TITLE))
{
nk_layout_row_dynamic(ctx, 80, 1);
nk_button_label(ctx, "button");
}
nk_end(ctx);
The hover isn't updated, because windows are detected as intersecting each other:
Lines 221 to 242 in adc52d7
NK_INTERSECT
is defined as:Lines 5405 to 5406 in adc52d7
#define NK_INTERSECT(x0, y0, w0, h0, x1, y1, w1, h1) \
(!(((x1 >= (x0 + w0)) || ((x1 + w1) <= x0) || (y1 >= (y0 + h0)) || (y1 + h1) <= y0)))
This way, it would match all the other checks based on NK_BETWEEN
which is also exclusive in the upper bound:
Lines 5402 to 5404 in adc52d7
Using 32bit size signed is limited to [−2,147,483,647, +2,147,483,647]
range.
It's not possible to have larger value than that in the current Nuklear.
Adding support for unsigned long long which is 64bit size will have [0, +18,446,744,073,709,551,615]
range and open up more possibility for apps using Nuklear.
The function could be called nk_property_ull(struct nk_context *ctx, const char *name, unsigned long long min, unsigned long long *val, unsigned long long max, unsigned long long step, float inc_per_pixel)
.
Adding this function would require:
enum nk_property_kind {
NK_PROPERTY_INT,
NK_PROPERTY_FLOAT,
NK_PROPERTY_DOUBLE,
+ NK_PROPERTY_ULL
};
union nk_property {
int i;
float f;
double d;
+ unsigned long long ull;
};
We have to think about not overflowing signed or wrap around unsigned values. INT30-C INT32-C.
line: 15769
/* ... */
layout->flags |= NK_WINDOW_HIDDEN;
layout->flags |= NK_WINDOW_CLOSED;
layout->flags &= ~NK_WINDOW_MINIMIZED; // new line
/* ... */
layout->flags |= NK_WINDOW_CLOSED;
nk_window_is_closed does not work for me, looking in the previous Issue I found that someone reported it but this was not implemented.
Tested and it works, please test and implement.
/*
#define NK_IMPLEMENTATION
#define NK_INCLUDE_DEFAULT_ALLOCATOR //prevents having to manage memory allows us of nk_init_default
#define NK_INCLUDE_FONT_BAKING//allows for use of custom fonts with high level API
#define NK_INCLUDE_DEFAULT_FONT//to allow loading default fon
#define NK_INCLUDE_STANDARD_IO//to allowloading custom fonts
#define _CRT_SECURE_NO_WARNINGS allows importing fonts without errors
*/
#include "Resource.h"
#include <windows.h>
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <tchar.h>
#include <string>
#include <stdio.h>
#include <iostream>
#include <nuklear.h>
int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPWSTR lpCmdLine,
_In_ int nCmdShow)
{
struct nk_context ctx;
nk_font_atlas atlas;
struct nk_font_config cfg = nk_font_config(0);
struct nk_font* font_14;
cfg.oversample_h = 3;
cfg.oversample_v = 2;
cfg.coord_type = NK_COORD_PIXEL;
const void* image;
void* image2;
int w, h;
nk_font_atlas_init_default(&atlas);
nk_font_atlas_begin(&atlas);
//font_14 = nk_font_atlas_add_default(&atlas, 14, &cfg);
font_14 = nk_font_atlas_add_from_file(&atlas, "Roboto-Light.ttf", 12, &cfg);
image = nk_font_atlas_bake(&atlas, &w, &h, NK_FONT_ATLAS_ALPHA8);
image2 = new char[w * h];
memcpy(image2, image, w * h);
nk_font_atlas_end(&atlas, nk_handle_id(30), NULL); //30 means nothing?
nk_init_default(&ctx, &font_14->handle);
if (nk_begin(&ctx, "Window 1", nk_rect(10, 10, 400, 600), NK_WINDOW_BORDER | NK_WINDOW_MOVABLE)) {
}
nk_end(&ctx);
}
The definitions commented at the start have been added within the pre-compiler settings
Am I mistaken in that the above is the minimum required code to create a window? Since it doesn't work :( Are there minimalized examples for simple things like this?
Building demo/sdl_opengl3 with MSYS2 causes:
$ make
rm -f bin/demo.exe
cc main.c -std=c99 -pedantic -O2 -o bin/demo.exe -lmingw32 -lSDL2main -lSDL2 -lopengl32 -lm -lGLU32 -lGLEW32
In file included from C:/msys64/mingw64/include/SDL2/SDL.h:32,
from main.c:14:
main.c:73:5: error: conflicting types for 'SDL_main'
73 | int main(void)
| ^~~~
In file included from C:/msys64/mingw64/include/SDL2/SDL.h:32,
from main.c:14:
C:/msys64/mingw64/include/SDL2/SDL_main.h:121:29: note: previous declaration of 'SDL_main' was here
121 | extern SDLMAIN_DECLSPEC int SDL_main(int argc, char *argv[]);
| ^~~~~~~~
make: *** [Makefile:25: demo.exe] Error 1
It can be fixed adding arg params:
Nuklear/demo/sdl_opengl3/main.c
Line 73 in e4d90b7
- int main(void)
+ int main(int argc, char * argv[])
I am trying out Nuklear on a raw frame buffer (boot loader environment - U-Boot).
I can see examples of how to create an nk_image and draw it for openGL, but I cannot figure out how it works with nuklear_rawfb.h
It seems to draw fonts but I am not sure how to make it draw images. Is there an example?
NK_TREE_NODE doesn't contain any children in my implementation of a tree view. So I would like it to be possible to disable the dropdown functionality for them. E.g. NK_HIDDEN.
if (nk_tree_push_id(ctx, NK_TREE_TAB, "application", NK_MINIMIZED, 0)) {
if (nk_tree_element_push_id(ctx, NK_TREE_NODE, "test", NK_HIDDEN, &dat.selected0, 0))
nk_tree_element_pop(ctx);
nk_tree_pop(ctx);
}
Currently not useful for me yet; but could potentially be an issue for other people or in the future.
If someone wants multiple fonts per text field or object, they'd have to set it per context as far as I've seen. Is there no better option? Like being able to specify parts of text that use different fonts?
Strict C++17 (all warnings as errors), doesn't allow if with a constexpr expression in there. That's what if constexpr
is for. This is an easy fix; only define the nk_memcpy & nk_memset implementations if they are used. I did it by adding a NK_DEF_MEMCPY
and NK_DEF_MEMSET
if the user didn't define theirs. And the check for if(sizeof(nk_draw_index)==2) should only happen ifndef NK_UINT_DRAW_INDEX.
Nielsbishere@d0c22eb
The branch above fixes it, but I don't know where those are located in the actual source (only the nuklear.h is modified).
Being able to have a version run using the native "Metal" API on macOS/iOS would be extremely helpful, as I'm migrating my tool from using the JUCE library, and I would greatly prefer to not rely on "glfw".
If someone has already done something along these lines, please inform me; Google didn't turn up anything useful.
Setting the button behavior to NK_BUTTON_REPEATER, doesn't do anything different from NK_BUTTON_DEFAULT.
I'm assuming it's supposed to repeat as long as the button is pressed?
It's useful to be able to rotate the coordinate space; for example, when drawing an analog clock.
I don't see any support for that in NK; did I miss it, or is it simply not there?
I'm looking to add a font in user code, after the font atlas has been created and baked.
Is there a way to accomplish that?
If I want to create a grid interface like excel, how should I do it ?
I can approximate it by using nk_group with NK_WINDOW_BORDER | NK_WINDOW_NO_SCROLLBAR flag but creating unique name for each group is a pain especially if the number of grid can change in runtime.
Run failed for master (bacdca7)
Repository: Immediate-Mode-UI/Nuklear
Workflow: C/C++ CI
Duration: 27.0 seconds
Finished: 2019-12-13 09:13:38 UTC
View results: https://github.com/Immediate-Mode-UI/Nuklear/commit/bacdca77720e9144b05393c722a0d2b62ced7fed/checks
Jobs:
Currently minimized windows can't be moved or unminimized or closed.
For me closed windows also stay behind, because I don't know if they have been closed from C++; is there a flag in nk_window I could check?
The previous wiki, even if sparse had screenshots and examples of how to use most things in nk, would be nice to have that moved over or one created for it to be expanded on. Visualizing was one of the hardest parts of using this toolkit, but after it's been smooth sailing.
There is no sample code...
My guess is that point->box checks are broken, but it can also obviously also be my code.
The following work fine: sliders, progress bars. Trying to use anything else however, won't work correctly. Other things such as radio, push buttons, sliders and checkboxes don't work. Sliders however do work sometimes, but barely.
https://imgur.com/a/VQYFFRs
The code can be found at on my repo but can only be built on Windows with CMake.
enum { EASY, NORMAL, HARD };
static int op = EASY, active[3]{ 1, 0, 1 }, selected{};
static float value = 0.6f;
static int i = 20;
static usz test{};
List<const c8*> names = {
"Cheese",
"Peanuts"
};
if (nk_begin(ctx, "Show", nk_rect(50, 50, 220, 300),
NK_WINDOW_BORDER|NK_WINDOW_SCALABLE|NK_WINDOW_MOVABLE|NK_WINDOW_CLOSABLE)) {
// fixed widget pixel width
nk_layout_row_static(ctx, 30, 80, 1);
if (nk_button_label(ctx, "Button")) {
oic::System::log()->debug("Hi");
}
// fixed widget window ratio width
nk_layout_row_dynamic(ctx, 30, 2);
if (nk_option_label(ctx, "Easy", op == EASY)) op = EASY;
if (nk_option_label(ctx, "Normal", op == NORMAL)) op = NORMAL;
if (nk_option_label(ctx, "Hard", op == HARD)) op = HARD;
nk_layout_row_dynamic(ctx, 30, 2);
nk_checkbox_label(ctx, "Yes?", active);
nk_checkbox_label(ctx, "No?", active + 1);
nk_checkbox_label(ctx, "Maybe?", active + 2);
nk_layout_row_dynamic(ctx, 30, 2);
nk_combobox(ctx, names.data(), int(names.size()), &selected, 30, nk_vec2(1, 1));
// custom widget pixel width
nk_layout_row_begin(ctx, NK_STATIC, 30, 2);
{
nk_layout_row_push(ctx, 50);
nk_label(ctx, "Volume:", NK_TEXT_LEFT);
nk_layout_row_push(ctx, 110);
nk_slider_float(ctx, 0, &value, 1.0f, 0.1f);
nk_progress(ctx, &test, 100, 1);
}
nk_layout_row_end(ctx);
}
nk_end(ctx);
if (!refresh && previous.data())
refresh = previous.size() != ctx->memory.needed || memcmp(previous.data(), ctx->memory.memory.ptr, previous.size());
//Convert to draw data
if (refresh) {
refresh = false;
static const struct nk_draw_vertex_layout_element vertLayout[] = {
{ NK_VERTEX_POSITION, NK_FORMAT_FLOAT, vertexLayout[0].offset },
{ NK_VERTEX_TEXCOORD, NK_FORMAT_FLOAT, vertexLayout[1].offset },
{ NK_VERTEX_COLOR, NK_FORMAT_R8G8B8A8, vertexLayout[2].offset },
{ NK_VERTEX_LAYOUT_END }
};
struct nk_convert_config cfg = {};
cfg.shape_AA = NK_ANTI_ALIASING_ON;
cfg.line_AA = NK_ANTI_ALIASING_ON;
cfg.vertex_layout = vertLayout;
cfg.vertex_size = vertexLayout.getStride();
cfg.vertex_alignment = 4 /* Detect? */;
cfg.circle_segment_count = 22;
cfg.curve_segment_count = 22;
cfg.arc_segment_count = 22;
cfg.global_alpha = 1.0f;
cfg.null = atlasTexture;
nk_buffer cmds, verts, idx;
nk_buffer_init(&cmds, &allocator, NK_BUFFER_DEFAULT_INITIAL_SIZE);
nk_buffer_init(&verts, &allocator, NK_BUFFER_DEFAULT_INITIAL_SIZE);
nk_buffer_init(&idx, &allocator, NK_BUFFER_DEFAULT_INITIAL_SIZE);
nk_convert(ctx, &cmds, &verts, &idx, &cfg);
vbo.release();
ibo.release();
primitiveBuffer.release();
auto vboStart = (u8 *)verts.memory.ptr;
auto iboStart = (u8 *)idx.memory.ptr;
vbo = {
g, NAME("NK VBO"),
GPUBuffer::Info(Buffer(vboStart, vboStart + verts.needed), GPUBufferType::VERTEX, GPUMemoryUsage::LOCAL)
};
ibo = {
g, NAME("NK IBO"),
GPUBuffer::Info(Buffer(iboStart, iboStart + idx.needed), GPUBufferType::INDEX, GPUMemoryUsage::LOCAL)
};
primitiveBuffer = {
g, NAME("Primitive buffer"),
PrimitiveBuffer::Info(
BufferLayout(vbo, vertexLayout),
BufferLayout(ibo, BufferAttributes(GPUFormat::R16u))
)
};
commands->clear();
commands->add(
BindPipeline(pipeline),
SetClearColor(Vec4f { 0, 0.5, 1, 1 }),
BeginFramebuffer(target),
SetViewportAndScissor(),
ClearFramebuffer(target),
BindPrimitiveBuffer(primitiveBuffer),
BindDescriptors(descriptors)
);
const nk_draw_command *cmd {};
nk_draw_index offset {};
nk_draw_foreach(cmd, ctx, &cmds) {
if (!cmd->elem_count) continue;
Texture t = Texture::Ptr(cmd->texture.ptr);
auto r = cmd->clip_rect;
commands->add(
r.w == 16384 ? SetScissor() : SetScissor({ u32(r.w), u32(r.h) }, { i32(r.x), i32(r.y) }),
DrawInstanced::indexed(cmd->elem_count, 1, offset)
);
offset += u16(cmd->elem_count);
}
commands->add(
EndFramebuffer()
);
nk_buffer_free(&cmds);
nk_buffer_free(&verts);
nk_buffer_free(&idx);
g.present(target, swapchain, commands);
u8 *prev = (u8*)ctx->memory.memory.ptr;
previous = Buffer(prev, prev + ctx->memory.needed);
} else
g.present(target, swapchain);
//Reset
nk_clear(ctx);
//Receive events
nk_input_begin(ctx);
//Could potentially use a callback system for efficiency TODO:
bool processedMouse{};
for(auto *dvc : vi->devices)
if (dvc->getType() == InputDevice::Type::KEYBOARD) {
//Only loop through nuklear keys
for (usz i = 0; i < NKey::count; ++i) {
//Get our key
String name = NKey::nameById(i);
usz keyId = Key::idByName(name);
if (keyId == Key::count) continue;
//Send to NK
auto state = dvc->getState(InputHandle(keyId));
if (state == InputDevice::PRESSED)
nk_input_key(ctx, nk_keys(NKey::values[i]), 1);
else if (state == InputDevice::RELEASED)
nk_input_key(ctx, nk_keys(NKey::values[i]), 0);
}
} else if(dvc->getType() == InputDevice::Type::MOUSE) {
if (processedMouse) continue;
f64 x = dvc->getCurrentAxis(MouseAxis::AXIS_X);
f64 y = dvc->getCurrentAxis(MouseAxis::AXIS_Y);
f64 px = dvc->getPreviousAxis(MouseAxis::AXIS_X);
f64 py = dvc->getPreviousAxis(MouseAxis::AXIS_Y);
if (px == x && py == y) continue;
//Only loop through nuklear keys
for (usz i = 0; i < NMouseButton::count; ++i) {
//Get our key
String name = NMouseButton::nameById(i);
usz keyId = MouseButton::idByName(name);
if (keyId == MouseButton::count) continue;
nk_input_button(ctx, nk_buttons(i), int(x), int(y), int(dvc->getCurrentState(ButtonHandle(keyId))));
}
nk_input_motion(ctx, int(x), int(y));
nk_input_scroll(ctx, nk_vec2(f32(dvc->getCurrentAxis(MouseAxis::AXIS_WHEEL)), 0));
processedMouse = true;
}
nk_input_end(ctx);
hi, im just testing out this framework. running on Mac OS 10.15, Xcode. Need plain English instructions in getting nuklear setup.
"symbol(s) not found for architecture x86_64". failed couple times in properly using the linker.
#include "nuklear.h"
#include <stdio.h>
enum {EASY, HARD};
static int op = EASY;
static float value = 0.6f;
static int i = 20;
struct nk_context ctx;
struct nk_user_font font;
void setup() {
nk_init_default(&ctx, &font);
if (nk_begin(&ctx, "Show", nk_rect(50, 50, 220, 220),
NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_CLOSABLE)) {
// fixed widget pixel width
nk_layout_row_static(&ctx, 30, 80, 1);
if (nk_button_label(&ctx, "button")) {
// event handling
}
// fixed widget window ratio width
nk_layout_row_dynamic(&ctx, 30, 2);
if (nk_option_label(&ctx, "easy", op == EASY)) op = EASY;
if (nk_option_label(&ctx, "hard", op == HARD)) op = HARD;
// custom widget pixel width
nk_layout_row_begin(&ctx, NK_STATIC, 30, 2);
{
nk_layout_row_push(&ctx, 50);
nk_label(&ctx, "Volume:", NK_TEXT_LEFT);
nk_layout_row_push(&ctx, 110);
nk_slider_float(&ctx, 0, &value, 1.0f, 0.1f);
}
nk_layout_row_end(&ctx);
}
nk_end(&ctx);
}
int main(int argc, const char * argv[]) {
setup();
}
Undefined symbols for architecture x86_64:
"_nk_begin", referenced from:
_setup in main.o
"_nk_button_label", referenced from:
_setup in main.o
"_nk_end", referenced from:
_setup in main.o
"_nk_init_default", referenced from:
_setup in main.o
"_nk_label", referenced from:
_setup in main.o
"_nk_layout_row_begin", referenced from:
_setup in main.o
"_nk_layout_row_dynamic", referenced from:
_setup in main.o
"_nk_layout_row_end", referenced from:
_setup in main.o
"_nk_layout_row_push", referenced from:
_setup in main.o
"_nk_layout_row_static", referenced from:
_setup in main.o
"_nk_option_label", referenced from:
_setup in main.o
"_nk_rect", referenced from:
_setup in main.o
"_nk_slider_float", referenced from:
_setup in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
The copy and paste feature of the X11 demo does not work. The code (found in nuklear_xlib.h) that accesses the X11 clipboard seems to have all come from one commit (#371). Since then, there have been no substantial changes to the respective lines of code.
Copy and paste in the gdi equivalent works (nuklear_gdi.h), so the problem seems specific to the xlib implementation.
Error 65543: Requested OpenGL version 4.5, got version 4.1
This is fixed in itsuhane's branch: vurtun/nuklear#861
I am trying to modify a function called icon_load() that currently is responsible for loading a .png image into memory, into a function that simply loads an image buffer that is created in heap memory.
Here is the original source code for it, defined in example/extended.c:
static struct nk_image
icon_load(const char *filename)
{
int x,y,n;
GLuint tex;
unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
if (!data) die("[SDL]: failed to load image: %s", filename);
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, x, y, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
glGenerateMipmap(GL_TEXTURE_2D);
stbi_image_free(data);
return nk_image_id((int)tex);
}
Now, here is what I did to change icon_load() so that it loads image buffers instead of .png files:
Instead of generating an image buffer from a .png file, I generated a 4 x 4 texel GL_RGBA texture on heap memory. I basically replaced stbi_load() (which returns a pointer to stbi_uc just a typedef for unsigned char)
by malloc() (which returns a void pointer but it is cast to unsigned char). I have also replaced stbi_image_free() by free()):
static struct nk_image
icon_load(const char *filename)
{
GLuint tex;
unsigned char *data = (unsigned char*)malloc(64 * sizeof(char));
static int messi = 1;
for (int i = 0; i < 64; i += 4)
{
data[i + 0] = 4 * i;
data[i + 1] = 0;
data[i + 2] = 0;
data[i + 3] = 0;
printf("data[%d] = %d\n", i, data[i]);
}
printf("Messi is %d\n", messi);
messi++;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 4, 4, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
glGenerateMipmap(GL_TEXTURE_2D);
free(data);
return nk_image_id((int)tex);
}
The output:
data[54] = 127
data[55] = 255
data[56] = 255Image created in memory triggers "if this triggers you forgot to add a font"
data[57] = 127
data[58] = 255
data[59] = 127
data[60] = 255
data[61] = 127
data[62] = 255
data[63] = 127
Messi is 32
Segmentation fault (core dumped)
Looking at the output I assume that malloc() was successful.
The fact that Messi is now 32, indicates that icon_load() was successfully called 31 times for each of the icons/images in lines 821 - 829 , before any rendering was actually done.
Using good old printf() debugging I realised the crash occurs inside function nk_begin_titled() (located inside function basic_demo()):
NK_ASSERT(ctx->style.font && ctx->style.font->width && "if this triggers you forgot to add a font");
How can this be fixed? How can I load images from memory buffer rather than a .png file?
PS: I have opened an issue on a now archived instance of nuklear, and I did get an answer from @revolucas, where he suggests the font has not been initialised. But it was, as NK_INCLUDE_DEFAULT_FONT is defined in the begining of the extended.c file and nk_style_set_font(ctx, &media->font_20->handle); is called just before nk_begin_titled().
Three additional APIs can make things better for the programmer (and the UX):
I've got a layout with labels on the left and edit controls on the right. Everything works nicely, but I want to be able to hit TAB (for instance) to move from one 'field' to the next.
What is the proper way to accomplish this?
When the window size is different that the screen resolution and the window is maximixed this demo (DX9) handle incorrectly the resolution, for example the mouse hover is too far from where it should be, meaning you need to move the mouse to the left several centimeters or to the right to move the scroll bar. To replicate this compile the demo adding ShowWindow(wnd, SW_MAXIMIZE); in the main function and be sure the window width and height is different that the current screen resolution.
My guessing is that the function nk_d3d9_get_projection_matrix () is wrong, so the projection matrix is calculated incorrectly. Actually that function calculate the matrix in a no standard way, at least not in the normal way of normal D3D9 applications. Or is coded in a John Carmack's style, meaning hacking style.
I can't test D3d11 but I tested the gdi demo and it work correctly.
Is there a way to clamp scalable nk windows between a minimum and maximum size?
Also, I found that if you close your main window, it clears the vbo to 0 (expected), but then it resets it?
twaik@ubuntu:~/Nuklear/demo/x11_rawfb$ make
rm -f bin/zahnrad
cc main.c -std=c89 -pedantic -O2 -Wunused -D_GNU_SOURCE -D_POSIX_C_SOURCE=200809L -o bin/zahnrad -lX11 -lXext -lm
In file included from main.c:49:0:
../../nuklear.h: In function ‘nk_font_bake’:
../../nuklear.h:12902:17: error: C++ style comments are not allowed in ISO C90
// Need to zero this, or it will carry over from a previous
^
../../nuklear.h:12902:17: error: (this will be reported only once per input file)
twaik@ubuntu:~/Nuklear/demo/x11_rawfb$ gcc --version
gcc (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
I notice that nuklear hasn't had any development on a D3D12 implementation/example and was wondering if this will be worked on in the near future or not?
ImGUI has been working on a D3D12 Rendering implementation since early 2018 and it is currently in a pretty good state and works well.
It would be nice to see Nuklear also be able to render with D3D12.
If I have a combo box in a pop-up window, it will crash when I click on the combo box. The assertion is in the line NK_ASSERT(!(panel->type & NK_PANEL_SET_POPUP)); in the function nk_nonblock_begin (line 16912).
Is this the desired behavior? what other components can't be used in a pop-up window ?
I'm using GLFW 3.3 with GL3 backend under MacOS v10.15.1.
In TextEditor, each Enter or Backspace key press will generate several key press events which makes the TextEditor nearly unusable.
I compiled nuklear with below defines:
NK_INCLUDE_FIXED_TYPES: 1
NK_INCLUDE_STANDARD_IO: 1
NK_INCLUDE_DEFAULT_ALLOCATOR: 1
NK_INCLUDE_VERTEX_BUFFER_OUTPUT: 1
NK_INCLUDE_FONT_BAKING: 1
NK_INCLUDE_DEFAULT_FONT: 1
NK_KEYSTATE_BASED_INPUT: 1
How to fix it?
Hi folks,
First time posting here, so first things first: thanks for this great project. I have been using it for a while and <3 it. But I ran into a small problem:
I am using a text edit filed (nk_edit_string) and am programmatically re-focusing it (nk_edit_focus). Works well, however the position of the cursor gets reset.
It would be great to have a flag for the nk_edit_string to make it remember its cursor position (I think there is none as of now). Sadly, my familiarity with nuklear's internals is very limited. I solved this by adding functions to get and set the cursor position (alexandervanrenen@c74da8a).
My question would be if this feature is of general interest: Is there a good way to already accomplish this? Would it be possible to add such a flag or use functions to set the cursor position?
Thanks,
Alex
Anyone here using https://github.com/zauonlok/renderer ? Do you think such backend would make sense for Nuklear?
Hi. There is a library called Nuklear Cross which can help us to hide hardware/software differences from developer and just let him/her write platform independent application. Can this be integrated to Nuklear?
If yes you can get rid of demo folder replacing it with single demo file. Selecting target platform can be implemented as providing single -D to the compiler or including header file.
Hi, would it be possible to have a glut demo with nuklear?
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