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SDL example: tweaks and fixes.

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This commit is contained in:
ocornut 2015-07-08 09:46:55 -06:00
parent 046dbf502c
commit b3ae2976c5
3 changed files with 19 additions and 32 deletions
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37
examples/opengl_sdl_example/imgui_impl_sdl.cpp
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@ -1,4 +1,3 @@
#ifdef _MSC_VER
#include <Windows.h>
#include <gl/GL.h>
@ -25,9 +24,6 @@ static GLuint g_FontTexture = 0;
// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
static void ImGui_ImplSdl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count)
{
if (cmd_lists_count == 0)
return;
// We are using the OpenGL fixed pipeline to make the example code simpler to read!
// A probable faster way to render would be to collate all vertices from all cmd_lists into a single vertex buffer.
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, vertex/texcoord/color pointers.
@ -208,7 +204,7 @@ bool ImGui_ImplSdl_NewFrame(SDL_Window *window)
ImGuiIO& io = ImGui::GetIO();
bool done(false);
bool done = false;
SDL_Event event;
while (SDL_PollEvent(&event))
{
@ -218,14 +214,15 @@ bool ImGui_ImplSdl_NewFrame(SDL_Window *window)
done = true;
break;
case SDL_MOUSEWHEEL:
if (event.wheel.y>0 )
{
if (event.wheel.y > 0)
g_MouseWheel = 1;
}
if (event.wheel.y<0 )
{
if (event.wheel.y < 0)
g_MouseWheel = -1;
}
break;
case SDL_MOUSEBUTTONDOWN:
if (event.button.button == SDL_BUTTON_LEFT) g_MousePressed[0] = true;
if (event.button.button == SDL_BUTTON_RIGHT) g_MousePressed[1] = true;
if (event.button.button == SDL_BUTTON_MIDDLE) g_MousePressed[2] = true;
break;
case SDL_TEXTINPUT:
ImGui_ImplSdl_CharCallback(event.text.text[0]);
@ -258,27 +255,21 @@ bool ImGui_ImplSdl_NewFrame(SDL_Window *window)
// Setup inputs
// (we already got mouse wheel, keyboard keys & characters from glfw callbacks polled in glfwPollEvents())
Uint32 windowFlags = SDL_GetWindowFlags(window);
if (windowFlags&SDL_WINDOW_MOUSE_FOCUS)
{
if (SDL_GetWindowFlags(window) & SDL_WINDOW_MOUSE_FOCUS)
io.MousePos = ImVec2((float)mx, (float)my); // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
}
else
{
io.MousePos = ImVec2(-1,-1);
}
for (int i = 0; i < 3; i++)
{
io.MouseDown[i] = g_MousePressed[i] || (mouseMask&(1<<i)) != 0; // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
g_MousePressed[i] = false;
}
io.MouseDown[0] = g_MousePressed[0] || (mouseMask & SDL_BUTTON(SDL_BUTTON_LEFT)) != 0; // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
io.MouseDown[1] = g_MousePressed[1] || (mouseMask & SDL_BUTTON(SDL_BUTTON_RIGHT)) != 0;
io.MouseDown[2] = g_MousePressed[2] || (mouseMask & SDL_BUTTON(SDL_BUTTON_MIDDLE)) != 0;
g_MousePressed[0] = g_MousePressed[1] = g_MousePressed[2] = false;
io.MouseWheel = g_MouseWheel;
g_MouseWheel = 0.0f;
// Hide/show hardware mouse cursor
SDL_ShowCursor( io.MouseDrawCursor ? 0 : 1);
SDL_ShowCursor(io.MouseDrawCursor ? 0 : 1);
// Start the frame
ImGui::NewFrame();

1
examples/opengl_sdl_example/imgui_impl_sdl.h
View File

@ -1,4 +1,3 @@
struct SDL_Window;
bool ImGui_ImplSdl_Init(SDL_Window *window);

13
examples/opengl_sdl_example/main.cpp
View File

@ -1,4 +1,4 @@
// ImGui - standalone example application for Glfw + OpenGL 2, using fixed pipeline
// ImGui - standalone example application for SDL2
#include <imgui.h>
#include "imgui_impl_sdl.h"
@ -12,10 +12,10 @@
#ifdef MACOSX
#include <OpenGL/gl.h>
#endif
#include <SDL.h>
#include <SDL_OpenGL.h>
int SDL_main(int /*argc*/, char* /*argv*/[])
{
@ -27,16 +27,13 @@ int SDL_main(int /*argc*/, char* /*argv*/[])
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
int width(1024), height(576);
// SDL window
SDL_DisplayMode current;
SDL_GetCurrentDisplayMode(0, &current);
SDL_Window *window = SDL_CreateWindow( "ImGui OpenGL2/SDL2 example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, width, height, SDL_WINDOW_OPENGL|SDL_WINDOW_RESIZABLE );
SDL_Window *window = SDL_CreateWindow("ImGui SDL2+OpenGL example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, SDL_WINDOW_OPENGL|SDL_WINDOW_RESIZABLE);
// Create an OpenGL context associated with the window.
SDL_GLContext glcontext = SDL_GL_CreateContext(window);
@ -55,9 +52,9 @@ int SDL_main(int /*argc*/, char* /*argv*/[])
bool show_another_window = false;
ImVec4 clear_color = ImColor(114, 144, 154);
bool done(false);
// Main loop
while(!done)
bool done = false;
while (!done)
{
done = ImGui_ImplSdl_NewFrame(window);