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cropping ui partly done (upper left cropper works)

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Green Sky 2023-10-05 14:23:39 +02:00
parent c98dd8a584
commit bb824a9fb7
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2 changed files with 125 additions and 12 deletions
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127
src/send_image_popup.cpp
View File

@ -33,6 +33,8 @@ void SendImagePopup::reset(void) {
_tu.destroy(tex_id);
}
preview_image = {};
cropping = false;
}
bool SendImagePopup::load(void) {
@ -269,18 +271,127 @@ void SendImagePopup::render(void) {
height = max_height;
}
// save curser pos
// TODO: propergate type
ImGui::Image(
preview_image.getID<void*>(),
ImVec2{static_cast<float>(width), static_cast<float>(height)}
);
// TODO: propergate texture id type
// TODO: crop input here
// save curser pos
const auto pre_img_curser_screen = ImGui::GetCursorScreenPos();
const auto pre_img_curser = ImGui::GetCursorPos();
if (cropping) { // if cropping
// display full image
ImGui::Image(
preview_image.getID<void*>(),
ImVec2{static_cast<float>(width), static_cast<float>(height)}
);
const auto post_img_curser = ImGui::GetCursorPos();
ImGui::PushStyleColor(ImGuiCol_Button, ImVec4{0.5f, 0.5f, 0.5f, 0.2f});
ImGui::PushStyleColor(ImGuiCol_ButtonActive, ImVec4{0.5f, 0.5f, 0.5f, 0.4f});
static Rect crop_before_drag = crop_rect;
auto ul_clipper_pos = ImVec2{float(crop_rect.x)/original_image.width, float(crop_rect.y)/original_image.height};
{ // crop upper left clipper
ImGui::SetCursorPos({
pre_img_curser.x + ul_clipper_pos.x * width,
pre_img_curser.y + ul_clipper_pos.y * height
});
static bool dragging_last_frame = false;
ImGui::Button("##ul_clipper", {TEXT_BASE_HEIGHT, TEXT_BASE_HEIGHT});
if (ImGui::IsMouseDragging(ImGuiMouseButton_Left)) {
if (dragging_last_frame) {
auto drag_total = ImGui::GetMouseDragDelta();
drag_total.x = (drag_total.x / width) * original_image.width;
drag_total.y = (drag_total.y / height) * original_image.height;
crop_rect.x = std::max<float>(crop_before_drag.x + drag_total.x, 0.01f);
crop_rect.y = std::max<float>(crop_before_drag.y + drag_total.y, 0.01f);
crop_rect.x = std::min<int32_t>(crop_rect.x, original_image.width-2);
crop_rect.y = std::min<int32_t>(crop_rect.y, original_image.height-2);
crop_rect.w = crop_before_drag.w - (crop_rect.x - crop_before_drag.x);
crop_rect.h = crop_before_drag.h - (crop_rect.y - crop_before_drag.y);
} else {
if (ImGui::IsItemActive()) {
dragging_last_frame = true;
// drag started on button, start drag
std::cout << "drag started\n";
} else {
std::cout << "drag but now ours\n";
}
}
} else if (dragging_last_frame) { // was dragging
std::cout << "drag ended\n";
dragging_last_frame = false;
crop_rect = sanitizeCrop(crop_rect, original_image.width, original_image.height);
crop_before_drag = crop_rect;
}
}
// crop lower right clipper
auto lr_clipper_pos = ImVec2{float(crop_rect.x+crop_rect.w)/original_image.width, float(crop_rect.y+crop_rect.h)/original_image.height};
{ // 4 lines delimiting the crop result
// x vertical
ImGui::GetWindowDrawList()->AddLine(
{pre_img_curser_screen.x + ul_clipper_pos.x * width, pre_img_curser_screen.y},
{pre_img_curser_screen.x + ul_clipper_pos.x * width, pre_img_curser_screen.y + height},
0xffffffff,
1.f
);
// y horizontal
ImGui::GetWindowDrawList()->AddLine(
{pre_img_curser_screen.x, pre_img_curser_screen.y + ul_clipper_pos.y * height},
{pre_img_curser_screen.x + width, pre_img_curser_screen.y + ul_clipper_pos.y * height},
0xffffffff,
1.f
);
// w vertical
// h horizontal
}
// cancel/ok buttons in the img center?
ImGui::PopStyleColor(2);
ImGui::SetCursorPos(post_img_curser);
crop_rect = sanitizeCrop(crop_rect, original_image.width, original_image.height);
} else {
crop_rect = sanitizeCrop(crop_rect, original_image.width, original_image.height);
// display cropped area
ImGui::Image(
preview_image.getID<void*>(),
ImVec2{static_cast<float>(width), static_cast<float>(height)},
ImVec2{float(crop_rect.x)/original_image.width, float(crop_rect.y)/original_image.height},
ImVec2{float(crop_rect.x+crop_rect.w)/original_image.width, float(crop_rect.y+crop_rect.h)/original_image.height}
);
const auto post_img_curser = ImGui::GetCursorPos();
ImGui::SetCursorPos(pre_img_curser);
// TODO: fancy cropping toggle
ImGui::PushStyleColor(ImGuiCol_Button, ImVec4{0.5f, 0.5f, 0.5f, 0.2f});
if (ImGui::Button("crop", {TEXT_BASE_WIDTH*8, TEXT_BASE_HEIGHT*2})) {
cropping = true;
}
ImGui::PopStyleColor();
ImGui::SetCursorPos(post_img_curser);
}
}
crop_rect = sanitizeCrop(crop_rect, original_image.width, original_image.height);
const bool cropped = crop_rect.x != 0 || crop_rect.y != 0 || crop_rect.w != original_image.width || crop_rect.h != original_image.height;
ImGui::Text("crop: x:%d y:%d w:%d h:%d", crop_rect.x, crop_rect.y, crop_rect.w, crop_rect.h);
bool recalc_size = false;
if (cropped) {

10
src/send_image_popup.hpp
View File

@ -22,14 +22,16 @@ struct SendImagePopup {
ImageLoaderI::ImageResult original_image;
struct Rect {
uint32_t x {0};
uint32_t y {0};
int32_t x {0};
int32_t y {0};
uint32_t w {0};
uint32_t h {0};
int32_t w {0};
int32_t h {0};
};
Rect crop_rect;
bool cropping {false};
// texture to render (orig img)
TextureEntry preview_image;