我试图使OF窗口按比例调整大小，以保持窗口的width和height之间的比率相同。
例如，如果您创建一个具有400x300尺寸的窗口，并且将宽度拉伸(stretch)到800，那么即使您仅水平拉伸(stretch)该窗口，其高度也将自动拉伸(stretch)到600。
无论如何，为了实现此功能，我需要在ofSetWindowShape()侦听器中使用windowResized()。
我可以很快在MacOS X上对此进行原型(prototype)制作，并且效果很好。
这是代码:
App.h的
enum ScaleDir { //window scaling directions
SCALE_DIR_HORIZONTAL,
SCALE_DIR_VERTICAL,
};
ScaleDir scaleDir;
int windowWidth, windowHeight; //original window dimensions
float widthScaled, heightScaled; //scaled window dimensions
float windowScale; //scale amount (1.0 = original)
bool bScaleDirFixed; //is direction fixed?
App.cpp的
//--------------------------------------------------------------
void ofApp::setup(){
windowWidth = ofGetWidth();
windowHeight = ofGetHeight();
windowScale = 1.0f;
widthScaled = windowWidth * windowScale;
heightScaled = windowHeight * windowScale;
}
//--------------------------------------------------------------
void ofApp::update(){
if (bScaleDirFixed) {
bScaleDirFixed = false;
}
}
//--------------------------------------------------------------
void ofApp::draw(){
ofSetColor(255, 0, 0);
ofSetCircleResolution(50);
ofDrawEllipse(widthScaled/2, heightScaled/2, widthScaled, heightScaled); //the ellipse will be scaled as the window gets resized.
}
//--------------------------------------------------------------
void ofApp::windowResized(int w, int h){
if (!bScaleDirFixed) {
int gapW = abs(widthScaled - w);
int gapH = abs(heightScaled - h);
if (gapW > gapH)
scaleDir = SCALE_DIR_HORIZONTAL;
else
scaleDir = SCALE_DIR_VERTICAL;
bScaleDirFixed = true;
}
float ratio;
if (scaleDir == SCALE_DIR_HORIZONTAL) {
ratio = static_cast<float>(windowHeight) / static_cast<float>(windowWidth);
h = w * ratio;
windowScale = static_cast<float>(w) / static_cast<float>(windowWidth);
}
else if (scaleDir == SCALE_DIR_VERTICAL) {
ratio = static_cast<float>(windowWidth) / static_cast<float>(windowHeight);
w = h * ratio;
windowScale = static_cast<float>(h) / static_cast<float>(windowHeight);
}
widthScaled = windowWidth * windowScale;
heightScaled = windowHeight * windowScale;
ofSetWindowShape(widthScaled, heightScaled);
}
但是，如果我在Ubuntu上运行相同的代码，则在调整窗口大小后，该应用程序将冻结。似乎
ofSetWindowShape()调用windowResized()侦听器，因此进入了无限循环。如何更改代码，使其也可以在Ubuntu上正常工作？
任何建议或指导将不胜感激!
附注:如果Linux用户可以确认应用冻结，我也将不胜感激。
最佳答案
你试过了吗:
ofSetupOpenGL(widthScaled, heightScaled, OF_WINDOW);
显然，应该仅在App::Setup()期间调用ofSetWindowShape()...
see OF tutorials here