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Автор темы
- #1
Нужно добавить Color Picker.
Что-бы менялся цвет меню.
Вот его код:
Что-бы менялся цвет меню.
Вот его код:
Код:
void ImDrawList::AddTriangleFilledMultiColor(const ImVec2& a, const ImVec2& b, const ImVec2& c, ImU32 col_a, ImU32 col_b, ImU32 col_c)
{
if (((col_a | col_b | col_c) >> 24) == 0)
return;
const ImVec2 uv = GImGui->FontTexUvWhitePixel;
PrimReserve(3, 3);
PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx + 1)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx + 2));
PrimWriteVtx(a, uv, col_a);
PrimWriteVtx(b, uv, col_b);
PrimWriteVtx(c, uv, col_c);
}
bool ColorPicker(const char* label, ImColor* color)
{
static const float HUE_PICKER_WIDTH = 20.0f;
static const float CROSSHAIR_SIZE = 7.0f;
static const ImVec2 SV_PICKER_SIZE = ImVec2(200, 200);
bool value_changed = false;
ImDrawList* draw_list = ImGui::GetWindowDrawList();
ImVec2 picker_pos = ImGui::GetCursorScreenPos();
ImColor colors[] = {ImColor(255, 0, 0),
ImColor(255, 255, 0),
ImColor(0, 255, 0),
ImColor(0, 255, 255),
ImColor(0, 0, 255),
ImColor(255, 0, 255),
ImColor(255, 0, 0)};
for (int i = 0; i < 6; ++i)
{
draw_list->AddRectFilledMultiColor(
ImVec2(picker_pos.x + SV_PICKER_SIZE.x + 10, picker_pos.y + i * (SV_PICKER_SIZE.y / 6)),
ImVec2(picker_pos.x + SV_PICKER_SIZE.x + 10 + HUE_PICKER_WIDTH,
picker_pos.y + (i + 1) * (SV_PICKER_SIZE.y / 6)),
colors[i],
colors[i],
colors[i + 1],
colors[i + 1]);
}
float hue, saturation, value;
ImGui::ColorConvertRGBtoHSV(
color->Value.x, color->Value.y, color->Value.z, hue, saturation, value);
auto hue_color = ImColor::HSV(hue, 1, 1);
draw_list->AddLine(
ImVec2(picker_pos.x + SV_PICKER_SIZE.x + 8, picker_pos.y + hue * SV_PICKER_SIZE.y),
ImVec2(picker_pos.x + SV_PICKER_SIZE.x + 12 + HUE_PICKER_WIDTH,
picker_pos.y + hue * SV_PICKER_SIZE.y),
ImColor(255, 255, 255));
draw_list->AddTriangleFilledMultiColor(picker_pos,
ImVec2(picker_pos.x + SV_PICKER_SIZE.x, picker_pos.y + SV_PICKER_SIZE.y),
ImVec2(picker_pos.x, picker_pos.y + SV_PICKER_SIZE.y),
ImColor(0, 0, 0),
hue_color,
ImColor(255, 255, 255));
float x = saturation * value;
ImVec2 p(picker_pos.x + x * SV_PICKER_SIZE.x, picker_pos.y + value * SV_PICKER_SIZE.y);
draw_list->AddLine(ImVec2(p.x - CROSSHAIR_SIZE, p.y), ImVec2(p.x - 2, p.y), ImColor(255, 255, 255));
draw_list->AddLine(ImVec2(p.x + CROSSHAIR_SIZE, p.y), ImVec2(p.x + 2, p.y), ImColor(255, 255, 255));
draw_list->AddLine(ImVec2(p.x, p.y + CROSSHAIR_SIZE), ImVec2(p.x, p.y + 2), ImColor(255, 255, 255));
draw_list->AddLine(ImVec2(p.x, p.y - CROSSHAIR_SIZE), ImVec2(p.x, p.y - 2), ImColor(255, 255, 255));
ImGui::InvisibleButton("saturation_value_selector", SV_PICKER_SIZE);
if (ImGui::IsItemHovered())
{
ImVec2 mouse_pos_in_canvas = ImVec2(
ImGui::GetIO().MousePos.x - picker_pos.x, ImGui::GetIO().MousePos.y - picker_pos.y);
if (ImGui::GetIO().MouseDown[0])
{
mouse_pos_in_canvas.x =
ImMin(mouse_pos_in_canvas.x, mouse_pos_in_canvas.y);
value = mouse_pos_in_canvas.y / SV_PICKER_SIZE.y;
saturation = value == 0 ? 0 : (mouse_pos_in_canvas.x / SV_PICKER_SIZE.x) / value;
value_changed = true;
}
}
ImGui::SetCursorScreenPos(ImVec2(picker_pos.x + SV_PICKER_SIZE.x + 10, picker_pos.y));
ImGui::InvisibleButton("hue_selector", ImVec2(HUE_PICKER_WIDTH, SV_PICKER_SIZE.y));
if (ImGui::IsItemHovered())
{
if (ImGui::GetIO().MouseDown[0])
{
hue = ((ImGui::GetIO().MousePos.y - picker_pos.y) / SV_PICKER_SIZE.y);
value_changed = true;
}
}
*color = ImColor::HSV(hue, saturation, value);
return value_changed | ImGui::ColorEdit3(label, &color->Value.x);
}
